navien tankless water heater pressure relief valve

Designed for use with NPE-2 series units when installing your unit outside. Then, shut the water off so you can replace the valve safely. Tankless Water Heater Service Valve, Pipe Size 3/4 in, Body Material Brass, Pressure Range 398 to 500 psi, Temp. All were inspected and installed in accordance with the manufacturers instructions. I cannot figure out why. The add-on rack is designed to Well I installed quite a few 100% Electric Tankless Water Heaters and never once put one on it. NaviCirc Valve Kit includes the NaviCirc Valve (PFFW-SXX-001) and two 1/2" x 3/8" flexible hoses and adapters. Navien Valves. Heres the science behind an expansion tank. If its still between 40-80 PSI, the pressure isnt the problem here. Recalled model numbers are CR-180 (A), CR-210 (A), CR-240 (A), CC-180 (A), CC-210 (A) and CC-240 (A) manufactured in 2008. If it's down the drain you will never know you have an issue. During the start-up, the unit just cranks that gas valve open and starts sparking. It will eat them. If there is an excess of pressure in the heater and a lack of air in the expansion tank, the water will be forced back into the expansion tank instead of the main water supply line. Place the filter assembly back into the water heater and secure it with the screw. Only 7 left in stock - order soon. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. Includes gateway, power supply, connectors and set up instructions. Lead-Free isolation valve kit with relief valve 3 valve set: Cold, Hot, Recirculation Return. CTVNews 3 Mar 12 NCB-H series parts kit designed to help service in the field. The recalled water heaters and combination boilers were manufactured between July 9, 2018 through October 14, 2018. Read Also: Lg Dual Inverter Ac Manual. UPS, FedEx and USPS have modified their service guarantee. We might be able to do something about it. Hi, my 7 yr old Navien tankless water heater has been intermittently spraying water from pressure relief valve every day or so. Just grab a new one from your local hardware store for a few bucks to make your heater new again. Quote from Youtube video: Answer. Protect your water supply and your water heating equipment with eco-friendly water treatment solutions. Natural Gas Tankless water heater condensate volume. This is for safety reasons. If any particular ad is your REASON for blocking ads, please let us know. The 9007607005 Neutralizer assembly neutralizes the condensate (acidic water) that forms in the secondary heat exchanger of the water heater. 99. The pressure relief safety or p/t valve can open due to abnormal conditions such as too hot, or too much pressure, or just bad. This purpose of the relief valve is to discharge water in two cases: When either of these takes place, the relief valve is activated, and the excess hot water flows out the relief valve. expand the base rack system allowing up to 16 units back Replacing a T&P valve usually doesnt take much effort, but if you dont, the valve can potentially get choked and cause an explosion. Please try again later. Loose metal enclosure cover. You will loseand discover that the pig likes it.. Find Navien accessories and parts kits for venting & termination, plumbing, Wi-Fi control & field service for tankless water heaters, boilers & combi-boilers. The drain lines in my house are copper and then they become cast iron at some point (who knows what is original from the 70's and what has been remodeled before I bought it). Required for NPN-U outdoor installations. The water heater pressure is already installed when you receive your water heater (or buy a home that has one already). designed, with pipe support brackets, for infield The tankless water heater should have been installed only by a qualified, Tagaki approved installer so it should be proper. The Navien NPE-A is a powerful tankless water heater that delivers hot water on demand. Step 3: Drain about 10 gallons from the water heater. Here is a handy guide for dealing with Navien tankless water heater problems that. What are the most common installation mistakes with water heater replacement? Without a neutralizer, condensate has the potential to corrode a buildings foundation, floors, and drainage system. Instead I would then think you need a thermal expansion tank, despite supposedly not needing one. for ateam inspection by two FL-licensed contractors and inspectors. FREE delivery Thu, Mar 9. All Rights Reserved. Buffer Tanks Works with NPN-U and NPN-E units. A water heater pressure relief valve, also referred to as a T&P valve, pressure relief valve, or water heater temperature valve is a safety feature that you can find on any water heater. 30012581A NAVIEN 3/4 EASY VALVE KIT NAVIEN 3/4 EASY VALVE KIT 30012581A Item #: 30012581A Manufacturer: NAVIEN Manufacturers Product Number: 30012581A NAV30012581A. The manufacturer said to check my water pressure. Products with electrical plugs are designed for use in the US. However, being tankless does not mean they will not leak. The liquid comes out through this auxiliary route, relieving the heat and pressure within the water tank. When the Navien Water Heater / Heating Boiler is at maximum burn, check the inlet gas pressure reading on the manometer, it should read between 3.75"and 10.5"WC for Natural Gas / 10.5". It serves as a filtration device for the acidic condensate created during the combustion process in gas-fired, high-efficiency appliances. If the pressure is less than 80 PSI, its all well and good. Designed to neutralize the condensate of up to: Add-on. We are sorry. But this is not always the case. Because this everyday appliance is a closed system, thermal expansion occurs in water heaters. What does it mean when a water heater Temperature/Pressure Relief (TPR) discharge pipe is "trapped"? Up here a high velocity heating system is forced air and heat exchangers, smaller ducts carry the same amount of air at higher pressure. When water temperature exceeds the limit, awater heatertypically releases a lot of hot water to lower the temperature. Is it alright to have a shut-off valve on both the hot and cold water pipes at a water heater? Quote from Youtube video: Now you're ready to install the new T&P valve use teflon tape to seal the threads count out at least six wraps of tape. We are in Florida and provide plenty of information about hurricanes and sinkholes, for example, but nothing on basements and ice dams. The manual for. Hi, my 7 yr old Navien tankless water heater has been intermittently spraying water from pressure relief valve every day or so. This specific state that the water heater is in is called the blowdown. Usually, the blowdown is defined by professionals (and is used in the design or set up of the valve) as a specific pressure percentage. Is a catch pan and drain piping required for a replacement water heater? LOL, Powered by Discourse, best viewed with JavaScript enabled, Tankless water heater and pressure relief valve. Where are gas water heaters not allowed to be installed? Yes I have a PH-meter. 3. Position. Is a PhD visitor considered as a visiting scholar? Includes gateway, power supply, connectors and set up instructions. If the problem is neither with your water temperature or pressure, then you might have a faulty relief valve. Converts proprietary equipment data to LonWork protocol. Pressure relief valves. Hereshow it works. Product Features3/4 inch IPS isolation tankless water heater service valve kit includes hot and cold isolation valves(600 WOG) and pressure relief valve (150 psi/200K BTU). Usually, you can find it upon the cold water feed, which is on top of the water tank, on the right side where the inlet is. Unprotected NM-cable connected to water heater. Making an unusual clicking sound as heard in linked video. Ideally you would be able to pipe it somewhere where there isn't any metal piping but if that's not an option you can use a condensate pump to, pump outside if you're in a climate where you don't experience freezing temperatures. Ready-Link Rack (V3) Base. $4444 $52.52. Replace the old valve and discharge tube with new ones. Designed to sense supply, return or tank temperature of your hydronic heating system. AMPP Certified Professional Licence #71794. Why is there water in my water heater drain pan? Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater. Everything is good, I installed the proper intake an exhaust with 3in schedule 40 PVC pipes as recommended, I plumbed 3/4in copper pipes for cold and hot water, a 3/4in gas line. Condensate neutralizers are crucial for treating acidic condensate from high-efficiency heating appliances. Visit ourWATER HEATERSpage for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles. It connects to the condensate drain port of the water heater by using connectors included with the neutralizer kit. and NHB (NHB -110 & NHB-150 models) series units produced on or after September 15, 2016. Recovering from a blunder I made while emailing a professor, How do you get out of a corner when plotting yourself into a corner. What can go wrong? Your water heater is leaking? Full content visible, double tap to read brief content. Built-in WI-FI capability allows connection without accessing facilitys LAN network. In the rare event that it pops you are supposed to see the water on the floor and thus be alerted to the issue. Another reason the valve could be leaking is that there is sediment or dirt trapped inside the relief port. Wall flange designed to work on 2 intake and How can I tell if a water heater is HUD-approved for mobile/manufactured homes? Water continuously flow from the pressure valve tube when there is no water running anywhere in the house. How do you drain the condensate in a tankless water heater? The leak can only be stopped when I close the cold water inlet. Right Paul. Whenyour water heaterpressure relief valve isnt functioning properly, its usually for one of to two reasons. This add-on accessory will enable customers with smartphones and tablets to control temperatures remotely, access usage data and receive diagnostic notifications on all Navien products (NPE-2, NPN-U, NPN-E, NCB-H, NFC-H, NFB-H and NHB). Designed for NPE-A and NPE-A2 series. If your water temperature is 210 F or higher, then its likely that your relief valve is discharging water due to the water overheating. Now, pull the metal lever of the valve slightly, so that a small amount of the watera quarter cup or sodischarges into the bucket. Tankless water heaters have evolved dramatically over the years. assembly and approved for indoor installations. Using a water pressure gauge is a simple method of determining whether excessive pressure is causing the relief valve to discharge water. Can I leave a gas water heater in place when remodeling a garage into a family room or bedroom? Ensure that the maximum BTU/H rating on the . We are so confident in our Fireside condensate neutralizers that we offer a 10-year warranty on our units, which is the best in the industry. This morning I went down to the boiler room and saw a paddle on the floor. 1. Navien NPE 240A tankless water heater is compatible with standard -inch gas lines up to 24 feet. If the pressure-relief valve is unable to open, the pressure can continue to build inside of the tank past that 100 PSI ceiling. If your T&P relief valve is leaking, it means there is something wrong with it. What is the difference between a manufactured/mobile home water heater and a regular water heater? This condensing water heater has a BTU rating of 19,900199,900 per hour. Page 34 Code in Canada and in accordance with all applicable local building codes. Allows for easy and quick servicing of DHW systems. Make sure your condensate doesn't come into contact with metals. Thanks. Are you tired of having to wait for hot water to reach your faucet every time you turn the water on? or do all tankless need them? Enjoy an endless supply of hot water with the SENSEI RU160iN Super High Efficiency Plus condensing tankless water heater from Rinnai. Then, take a bucket and put it under the discharge tube. Lowest price in 30 days. Why do water heaters have a sacrificial anode? Fan motor or motor mount comes loose. Contact your local Tagaki authorized installer for more information. Heres an excerpt from their manual: The Takagi gas-fired tankless water heater manual specifies a pressure relief valve on the hot water outlet. Lead free isolation valves. Quote from the video: Installation of Liquid Propane Gas line to new Takagi Tankless Water Heater, Correcting Navien Tankless Hot Water Heater Installation. Thanks. Highly recommended for protecting hydronic heating systems by capturing magnetite and iron oxides. The unit is installed in the center of the house upstairs in an utility room. There isnt a single solution for excessive water pressure. Reinsert the filter into the plastic assembly. When was a gas water heater first required to be elevated 18 inches above a garage floor? Is it alright to have a shut-off valve on both the hot and cold water pipes at a water heater? It looks like WhatsApp is not installed on your phone. Error posting question. This innovative accessory will make cascading up to 16 units in 2 banks of 8 easy for emergency same day replacements. Base rack allows installation for up to 2 units back to back. Part Number: (GXXX001931) 75 PSI . Its like wrestling a greased pig. Works with NFC, NFC-H, NHB, NFB, NFB-H and NFB-C series boilers. Can infrared thermal imaging find mold behind a wall? What does it mean when a gas appliance (water heater, furnace, or range) has been "red tagged"? A structural engineer we used to work with in the Florida Keys, Paul Mitchell, suggested to us after a struggle with a county inspector at our jobsite that Never argue with an inspector. Wait for it to cool completely. Normal water pressure falls between 40-80 PSI with no other taps running. Sometimes, theres a third reason why water discharges from the relief valve, and that is that if your relief valve is faulty or not properly sealed. The old water heater was hard plumbed (solder connections) to the drain line that is inside the wall, behind the sheetrock. Kelaro Tankless Water Heater Flushing Kit - Just add Vinegar Descaler, Hourleey 3/4 Inch IPS Isolator Tankless Water Heater Service Valve Kit, with Pressure Relief Valve, Clean Brass, 1996-2023, Amazon.com, Inc. or its affiliates. Quote from the video: You wont have to drain or power down your water heater, and you can deal with it yourself. . No required pressure relief valve at hot water side, because piping is CPVC. What is the difference between a regular water heater and a direct vent water heater? In the case of both temperature and pressure, the relief valve is doing its job, preventing an explosion. They always have relief valves. Each kit includes: * 3/4 Service Valves with PRV * 3/4 NPT Ball Valve * 2 Copper End Cap * 2-1/8 Strut Clamp * 3/4 x 24 SS Corrugated Flex Connector * 3/4 x 18 SS Corrugated Flex Connector * 1-7/8 OD Strut Clamp * 3/4 X 3/4 Adapter * 1-1/2 Gas Union * 2 Copper Coupling * 1-5/8 x 18 Strut Channel (14ga) * 3/4 x 30 Gas Flex Connector * 1-1/2 FPT Galvanized Iron End Cap * Hardware Kit. Tankless water heaters offer the discretion and space management that tank heaters do not. Slowly turn on the water. Water Heater Navien NR-180 (A) Owner's Operation Manual. 2023 TanklessParts.com ALL RIGHTS RESERVED, Navien OEM Repair Parts and Tankless Water Heaters, Navien OEM Repair Parts - Shop by Part Type, Watts 121327 3/4 inch 100# Pressure Relief Valve 0121327, Watts 556034 3/4 inch 150# Pressure Relief Valve 0556034, Navien 30002729A Pressure Reducing Valve Kit, Navien 30005993C Auto Feed Valve Assembly, Navien 30008245A Water Adjustment Valve for NPE/A. February 2014. Navien Water heaters have an advantage when it comes to being energy efficient. Please try again later. Can you wire a 240-volt water heater with 120 volts? $599.00. The NPE-2 series offers ultra-high efficiency up to 0.96 UEF to keep your utility bills low, endless hot water, and exclusive ComfortFlow technology with a built-in recirculation pump and buffer tank. Make sure that it doesnt come from the valve before replacing it. Gas-fired tankless systems can be designated as either condensing or non-condensing. Condensing tankless water heaters can achieve efficiencies of up to 98%, while non-condensing water heaters have a maximum efficiency of about 80%. Save my name, email, and website in this browser for the next time I comment. How do you fix a leaking temperature and pressure relief valve? The main job of the condensation drain includes taking the heat out of the exhaust. Most technician said there might be a leak in the heat exchanger. Therefore it doesnt require the same expensive and elaborate venting material. The first thing that comes to your mind is the water heater. Ready-Link Commercial Boiler Rack System The vapor from a condensing tankless water heater is much cooler. Thanks for contributing an answer to Home Improvement Stack Exchange! Because this everyday appliance is a closed system, thermal expansion occurs in water heaters. All Navien Valves are brand new in the original factory packaging and are guaranteed to fit and function properly. Usually, you can find it on the top or side of this appliance. Why is my water heater making strange (rumbling, gurgling, knocking or banging) noises? Condensate pump is not emptying properly. Now that weve reviewed everything you should know about a water heater pressure relief valve you might have realized that you need to replace your water heater valve. It only takes a minute to sign up. It may not display this or other websites correctly. The valves are inexpensive, and you can do a quick fix in a few simple steps: Turn off the water heater breaker (allow 24-48 hours for the water to cool). We asked for this to be added and the sellers told us that per the codes for tank-less hot water heaters (California) a pressure relief valve nor a discharge line are needed. with NPE-2 series units. Get genuine Navien factory OEM Valves for your Navien tankless water heater. And it makes it safe for discharge into the sewage or septic. Note: The pressure relief valve on a water heater cannot be used as the device to control the pressure. If youre hesitant about replacing the valve yourself, you can also get them fixed by your plumber. What does a neutralizer do for a tankless water heater? $96.00 $ 96. Is a catch pan and drain piping required for a replacement water heater? If you notice signs like reduced pressure in the heater, high or no water pressure, or even vibrating sounds from the pipelines, chances are the valve has gone bad. What is difference between condensing and non condensing tankless water heater? I must be missing something obvious :(. John, What is a High Velocity Heating System? Propane Gas 1.30 0.08 W.C 3.86 0.08 W.C gas valve Proportional valve Air Pressure Minimum Modulating Gas Pressure PCB Board Manometer Maximum Modulating gas . Once you have the pressure gauge, simply attach it to a hose bib around the house. I changed the relief valve and it still happens. JavaScript is disabled. 4.4 (130) $5799. Some people don't really understand the function of a pressure relief valve on water . Bosch, Noritz, etc require a pressure only relief valve on the hot water output. Fixing Your Water Heater Pressure Relief Valve. Pump not included. Manufacturers requirements supersede all othersit seems you do need a Pressure Relief Valve but it may depend upon your particular model. Designed to work with NFB-C series units. Tagaki and others, i.e. Can you use a light switch for a water heater disconnect? Zone pump controller designed to work with the NCB, NFC, NFB, NFB-C and NHB series allowing control from 2 to 6 zone pumps. Properly installing a neutralizer is fundamental, but only part of the solution. Navien Plumb Easy Valves (V2) are designed to provide ease of installation and operation as well as for quick maintenance on all tankless water heater models featuring a compact, versatile design that is easy to use. Gas-fired tankless water heaters will usually require a pressure relief valve, while electric on-demand water heaters may not. Relief Valve on Navien. Hello recently my old 50gal gas water heater developed a crack and started leaking. This package includes new stainless steel manifold, isolation valves with gaskets, PRV/air vent/LWCO adapter tree, air vent, threaded connection adapter with clip and LWCO plug. Keep in mind; this only happens during the . Adding another light switch to the bathroom. Pumps and Tanks Well Forum & Blog. HotButton kit allows manual operation of a recirculation pump (ComfortFlow on NPE-A). Replacement Media for Commercial Neutralizer. A combination temperature/pressure relief valve is only required with storage-tank type heaters. The manufacturers typically only require a pressure relief valve, not the combination temperature and pressure relief valve that is necessary for tank-type water heaters. 3/4 lead free isolation valves with relief valve designed Does a water heater need a shut-off valve? How Does a Water Heater Pressure Relief Valve Work? Good post Jeff. Quick view. August 24, 2021 by Hubert Miles. Get genuine Navien factory OEM Valves for your Navien tankless water heater. No required copper piping for first three feet from unit at both sides, as specified by manufacturer when plastic pipe is used. Converts proprietary equipment data to BACnet MS/TP, BACnet/IP and Modbus TCP building automation protocols. Residential condensate neutralizer for NPE-2, NCB-H, NFC-H, NHB and NFB-H units designed to neutralize the condensate of one unit. Navien introduces NaviCirc, the Navien recirculation valve designed for use with Navien NPE-A series tankless water heaters to provide recirculation of domestic hot water in applications where a dedicated return line is not available. It can generate up to 11.2 GPM at 45F and 12.2 gallons/minute at 35 F. warranty from date of purchase. To stop the humming noise, you must fix those issues. So I would say not ALL need such a valuebut I can only speak for the models (SETS) units. Whether or not a tankless water heater is required to have a pressure relief valve depends on what the manufacturer states in the installation manual. For this reason, it cuts installation time by half. "Extra push button for use with HotButton and extra wall plate. NFC-H series parts kit designed to help service in the field. To do this, simply let the heater run and open a hot water tap anywhere in the house for a good 2 to 3 minutes. Extra wall plate for use with HotButton and extra HotButton push buttons. And this . Generally speaking, its a good idea to hire a professional to protect yourself. In this case, you can quickly get a new relief valve from a local hardware store and replace it on your own with a few tools. https://www.google.com/aclk?sa=L&ai=DChcSEwjZsrDb78zgAhUOtrMKHQFmBB8YABAIGgJxbg&sig=AOD64_3f3Fc_0mYzjmXXWbHAYQvAGUPvyw&ctype=5&q=&ved=2ahUKEwiJ5abb78zgAhWCZd8KHSvbAk0Qwg96BAgLEBA&adurl= this one is 50 bucks. How you fix your water heaters relief valve depends on whats the issue causing the leakage. Heres an excerpt from that manual: So consult the manufacturers installation manual. What is the difference between a single element and dual element electric water heater? Must have been cold if you turned your heat on in Aug. How long does a condensate neutralizer last? Product Information Navien offers two series of tankless gas water heater; Navien Regular (NR) as residential models and Navien Premium (NP) as commercial models. Product Code: GXXX002139. In this case, it could be that your water system suffers from an intermittent or periodic increase in pressure. Check our price for ateam inspection by two FL-licensed contractors and inspectors. What is the difference between a manufactured/mobile home water heater and a regular water heater? You could potentially end up with burns if the high water pressure is dangerously high. It's possible that the flow sensor on your Navien tankless water heater is malfunctioning, which would explain why you don't have any hot water coming out of it. Why is an older water heater an insurance problem? Sleek and compact design with digital output temperature display. The manufacturers typically only require a pressure relief valve, not the combination temperature and pressure relief valve that is necessary for tank-type water heaters. Navien Tankless Water Heater Review: Products, Problems & Comparisons 3. Sale Bestseller No. But an overflow could also be caused by a faulty or leaking valve. Resources | Partners Login | Become an NSS |Certifications |Parts List | Technical Support | Careers |Global Network |Warranty, All contents copyright Navien Inc. | About Navien |Contact Us | Terms of Use |Privacy Policy |CCPA |Notices, Ultra-high efficiency condensing tankless water heaters, High efficiency non-condensing tankless water heaters, Use the menu above to filter accessories by series, or. Sometimes, you can easily fix this problem by opening and closing the valve lever a few times. A relief valve is absolutely necessary with any type of water heating device. What is backdrafting at a gas water heater? Non-condensing tankless water heaters utilize a single heat exchanger so they vent more heat in the exhaust gases. Allows users to . Here is an excerpt from a Tagaki installation manual: Interesting since the regular tank models have expansion tanks on the cold side. Otherwise, you could just call your plumber to fix it for you. Turn the unit off. Whether your water heater is heated by electric elements or a gas burner, both the metal tank and the water inside expand when the hot water temperature is somewhere between 120 and 140 degrees. Open the pressure relief valve. Yes down the drain is good, the condensate is slightly acidic, usually in the 3-5 pH range. - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of . If youve been having issues with your water heater recently, you might find that youre paying high energy bills, not getting access to hot water when you want it, or your water pressure is low. Mounting issue. High-efficiency condensing and non-condensing tankless water heaters offer endless hot water and reduce gas usage. My incoming water pressure is roughly . However, to be as safe as possible, you want to hire a professional. Designed to work with NPE-A series units. You must log in or register to reply here. Does a tankless water heater need a condensate neutralizer? Replacing conventional: electric hot water heater with tankless. Water Heater Recirculating Pump : Why And How Does It Work? But what would be the value added by a pump that I cannot get with gravity alone in this case? If the lever snaps into its original position and its still leaking, you need to turn off the gas valve by turning it to the off position. Approved for indoor and outdoor installations. However, when the temperature is 210 degreesor the pressure is 150pounds per inch(psi)this is far too much pressure and heat in the water heater. Designed for use with NPE-2 and NPN series tankless water heaters. How do I tell which drill kit will be useful and suit best for DIY requirements? What is the usual maximum load for drywall? What is required clearance for access and working space in front of an electric water heater? Lead free isolation valves. If the increase in pressure is constant, like in the first pressure test, then you need to install a new pressure regulator. 3/4 Inch IPS Isolator Tankless Water Heater Service Valve Kit with Pressure Relief Valve, Clean Brass, 3/4 Inch Service Installation Valve for rheem,rinai,ecosmart,navien,noritz,takagi,bosch. Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. Fortunately, you can perform these maintenance services on your own, eliminating the need for a plumber. Navien Valves. Especially important in retrofit situations where older piping exists. Primary loop manifold designed to work on NHB models for fast, clean installations. Pipe Fittings:3/4 inch NPT. Pull the filter out of the water heater. I have a 3/4in copper pipe plumbed into the house drain close by, so it does not look to be a big deal, however, this unit also has a condensate drain. Side by side look at the Navien Plumb Easy valve kit and the Webstone EXP E2 valve kit for tankless water heaters. Why does the relief valve overflow when discharging water? reset functionality on the NCB-E, NCB-H, NFC, NFC-H, NHB, NFB and NFB-H series units. Its a valve thats connected to a plastic or metal discharge tube that points up. Recall Details. Remove the valve and discharge tube. . Will not work with NCB-H and NFC-H Primary Stainless Steel Manifold (30026576A). How can I determine the age of a water heater if the serial number is missing or decoding it is impossible? exhaust pipe for a clean installation look in location where When the heater starts heating water after some hot water is used up, some excess hot water flows back into the main inlet pipe as it expands, causing the water pressure in the pipelines to rise as it has nowhere to go. Navien's support had me troubleshoot the issue as follows: 1. What's that powdery crust on the pipe connections at the water heater? Make sure you report which pressure valve went off the direct hot water should be 150psi. $149.99) For NPE and NCB series Navien tankless water heaters. So if youre having any issues with the valve, youll have to call a professional to have it fixed. 3/4 Inch IPS Isolator Tankless Water Heater Service Valve Kit with Pressure Relief Valve, Clean Brass, 3/4 Inch Service Installation Valve for rheem,rinai,ecosmart,navien,noritz,takagi,bosch. Though I understand what you mean. To learn more, see our tips on writing great answers. This can be frustrating, but whats the cause? Can you use a light switch for a water heater disconnect? Navien NR-240(A) - bypassing recirculation.

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