For questions generally relating to the hot-water supply system of a typical residential or commercial building, primarily regarding the heating mechanism itself (a traditional hot water heater tank, tankless heaters including "point-of-use", boilers and heat exchangers, etc).

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Why does my hot water heater flame and pilot go out?

Why would Kenmore water heater it lights then burner comes on until tank is all hot but after that it won't light again and flame goes all the way out and then I have to manual light the pilot again?
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1answer
33 views

Water heater pilot not staying lit

A customers 70 gallon gas fueled Bradford White water heaters' pilot light goes out immediately after releasing the red pilot button when relighting it. I concluded (in order of most likely suspects) ...
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1answer
174 views

Electric water heater overheating very quickly

We have an electric water heat that recently started heating the water to about boiling. We heard a loud pop one night, not sure if that has anything to do with it. So far we just replaced the ...
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0answers
71 views

Tankless water heater beeps and causes power surge

We have a new tankless water heater. Every time we turn on water lights through out house flicker and water heater starts beeping. Any ideas on what causes this to happen??
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5answers
1k views

How high to raise water heater above floor?

I saw a water heater stand at Home Depot but it's about 15" high. That's a bit too high for my basement. Can I just make one with 2x4 and plywood that's only 4" tall, basically just enough to be able ...
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3answers
43 views

Electric water heater power switch

Q1: Should there be a(n emergency) power switch next to an electric water heater? Q2: If A1 is no, is it okay to have one anyway? Q3: If A2 is yes, what kind of power switch should I use? I don't ...
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3answers
22k views

How do you know when you need a new water heater?

Our hot water is hot sometimes, but not always. For example I might be able to fill up a tub with hot water one morning, but the next morning the water might be cold. This is our first home and when ...
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4answers
2k views

How to determine gas leak on a water heater?

My gas water heater is certainly leaking gas. I can smell it. Using the image below, it seems like it might be coming from the red circle where the dial connects to the thermostat or the blue circle ...
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9answers
2k views

Is it about time to replace the water heater?

My wife and I just recently closed on our first home. The home was built in 1930 and aged excellently. The couple who we bought the home from had purchased it as a foreclosure in 2006 and made it ...
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1answer
24 views

Are water heater piezo igniters compatible across brands?

Is there really any difference in the piezo igniters used on water heaters? My Maytag has a bad one and they are not available any more, but it and its bracket look exactly the same as this Rheem one. ...
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1answer
1k views

What could cause the hot water not to work after replacing a water heater?

I replaced my hot water heater and now the hot water doesn't run in any of my faucets. What could be the problem? I did not have to replace any piping from old hot water heater and the water ran fine ...
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2answers
71 views

Does a water heater consume more or less power if one element isn't working?

Will there be more power consumption to heat water in the tank if one of the elements is not working or will it just take twice as long to heat the same amount of water to a preset temperature?
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2answers
108 views

I stripped the thermocouple adapter on the gas valve on my hot water heater so I cannot connect the thermocouple.

I can tell the connection piece has threads, is there a way to unscrew that piece and replace with a new one? The nut sheared off. Is there a way to alternately connect the end of the thermocouple to ...
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1answer
82 views

Hot water is coming out of all faucets brown

I live on the second floor in a condominium and had my direct vent hot water heater replaced approximately 8 years ago. At the time I recall having various vendors out to give me an estimate and very ...
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2answers
4k views

Newly installed water heater with faint gas smell

Installed a new water heater last night (Rheem Performance Plus Model #XG50T09HE40U0). All went well with installation (including gas line bubble test), but this morning I could detect a faint smell ...
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0answers
22 views

elec hot water heater stopped heating after water was shut off for repair

i am in a mobile home with a 9 month old elec hot water heater. They turned off the water yesterday due to a water main break. now it is not heating. help
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2answers
2k views

Desuperheater vs Heat Pump Water Heater

I'm having a geothermal heating system installed in my home, and the contractor recommended heating my water using a buffer tank and desuperheater, which is a device that cools the refrigerant lines ...
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2answers
80 views

Can I replace the thermopile with a thermocouple in my water heater, and have it work properly?

I'm having a tough time finding a thermopile at Home Depot, and lowes. I can find thermocouples all day long, and I can rig the wiring so I have no loose ends. However, I know those two units don't ...
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0answers
49 views

Could my New Hot Water Tank be improving my Furnace

I've gone thru 2 blower motors in my furnace in 3 yrs. Techs don't know why. I purchased a New Water Tank recently and it seems strange but my furnace is working better. Usually I could hear noises ...
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1answer
41 views

Plumbing - Particles / Debris In Faucets and Toilets - Water Softener Going Bad?

I had a hot water heater replaced in my house. Shortly thereafter, I noticed that the water flow in one of my faucets near the heater was very low. I wasn't sure, what to make of it, so I had the ...
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6answers
109k views

Should the water heater be shut down if the water main has to be turned off?

I have a brand new AO Smith 50gal gas water heater. Today there was a burst pipe from the cold spell we're having currently, so I had to turn off the water main to the house until the plumbers get ...
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2answers
122 views

Connecting a water heater, what kind of fittings, valves, and adapters?

I'm buying a new water heater, and quite frankly the series of connections and valves are mind boggling. What I'd like to do rather than soldier the pipes together is to go from compression to thread. ...
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5answers
16k views

Why does hot water come from the faucet when only the cold water tap is on?

On occasion, when I open the cold water tap on the kitchen sink, the flow from the faucet briefly becomes warm: it starts cool, becomes warm for about 30 seconds, and then returns to the desired cold ...
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1answer
2k views

Replacing water heater gas control valve

First let me summarize my questions, then provide detail: Summary: Can a newer gas control valve be installed on an older water heater? As an individual who has never attempted something like this ...
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2answers
80 views

Hot Water Tank limit switch tripping, but not over heating?

My just over 2 year old, professionally installed gas hot water tank frequently loses the pilot light. I've had the installer come out 4 different occasions to look, and every time, he's stumped at ...
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1answer
18 views

Furnace and Water Heater Ventilation pipe

I have a home that was built in 1924, the pipe that vents my furnace and water heater is green and it is located in my chimney. The top of the chimney is open in my attic, you can see the green ...
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0answers
59 views

Hot water no longer coming from water tank (air lock??)

Two days ago I disconnected and capped the water supply to a set of taps for an old laundry sink in my basement. I turned off the cold water supply to the house and also to the hot water tank before ...
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1answer
49 views

Should water heaters be turned off (for safety) when not in use?

Is there any safety concern regarding leaving water heaters on 24/7?
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2answers
73 views

Why is the TPR valve dripping on my new water heater?

I recently install a Kenmore #58240 40 gal. electric water heater. I had a 50 ga. approx. 12 yr. old Rheem which started to pop a little so I just decided to get a new one. After I installed it at ...
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1answer
53 views

What is a normal drip rate for a condensing tankless hot water heater?

I have a Tagaki T-H3-DV-N (Indoor) tankless hot water heater. It has a condensation drip spout, and drips about 1 gallon of water per day. Is this excessive or normal? Edit: I've spoken to the ...
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1answer
59 views

Why do both water tanks have hot inputs? Is my boiler (on-demand) feeding into my hot water heater?

I have an interesting setup that I'm trying to understand (without tearing apart sheetrock). I have two electric tank-based water heaters, and a tankless gas water heater that is used for the boiler ...
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0answers
18 views

Are all boiler heating systems closed?

Are all boiler heating systems closed? In other words, are they all filled with water that is just constantly recirculated, or are there some that put the outgoing water elsewhere?
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1answer
293 views

Suspect water heater is using too much gas

Not sure if this sounds reasonable, but I think the 8 year old gas water heater in the place I just moved into last month is using more gas than it should be. Gas meter recorded 50 therms used last ...
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1answer
16 views

Can I relocate my electric water heater under a basement window?

I am currently making floor plans for my finished basement in Ohio. I had a pipe near a frost free spigot rupture two years ago but that was because of a faulty washer. Is relocating the water heater ...
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2answers
36 views

Can I shut off a second water heater?

I reviewed this question and answer and there's probably similarities to this question, but wasn't sure what kind of setup I have. So I'm hoping I don't get flagged as duplicate. We've got two gas ...
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1answer
515 views

Water tank and timer (UK)

We recently moved into a small flat in the UK. For hot water we have an electric water tank with a main switch and electric timer: I made the following experiments: Main switch on / Timer on – ...
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2answers
13k views

What could cause a shower to give warm water for a few seconds, then only cold water?

The house has four bedrooms. The 40 gallon gas water heater is about 60 feet from this shower. The house is a one story house in flat terrain. I have already changed the mixing faucet for the shower, ...
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1answer
192 views

Thermocouple keep burning out, is it our gas valve?

Thermocouple keeps burning out. Looking at 1 or 2 within 2 week period ! Tried different brands, the pilot will only stay lit for 3 minutes then automatically shuts down.
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2answers
37 views

Water heater on pilot

so I moved into a new apartment last month. The water wasn't very hot so we thought it was just because the weather has been getting cold. Turns out the water heater has only been on pilot, so the ...
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1answer
28 views

closing cold water inlet valve to propane water while away for 2 months

I have a 16 year old State Industries 40 gal propane water heater. It currently works fine (only issue I've ever had was to replace the thermocouple a couple of years ago). However, I'll be away for ...
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2answers
590 views

Can my water heater's relief valve discharge line and drain pan line merge into a common pipe?

Currently, I only have a T&P relief discharge line that runs down to just above the pedestal and out through the exterior wall. I would like to install a drain pan under the water heater. I want ...
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3answers
40k views

troubleshooting a hot tub/spa that won't heat up

We have a Hotsprings/Watkins brand hottub/spa that came with the house we bought last September. At the time that we bought it, the hot tub appeared to work and heat up properly. However, now that ...
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2answers
451 views

Why does my shower run out of hot water quickly?

My shower runs out of hot water quickly. Initially the water is perfectly hot, then it starts cooling after a minute or so and we need to adjust the lever to maintain the temperature. Somewhere around ...
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1answer
6k views

My hot water stopped working in one bathroom, what can I try in order to fix it?

I have an electric water heater from 2004. The hot water works in all other areas of my house (kitchen, other bathroom and washing machine). The sinks and shower in my master bathroom are not ...
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1answer
77 views

Install of tankless water heater

I want to install a tankless water heater. Have a 125 amp panel, with two 30 amp breakers for the current water heater. Install manual recommends having two 40 amp breakers. Max draw is 75 amps. ...
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0answers
53 views

Solar Panel Collector type for Caribbean

I live in the Caribbean and am looking to get a solar water heater system. I’m looking into flat panel or evacuated tube system. I got an offer for an evacuated tube system with a stainless steel tank ...
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7answers
574 views

Replacing a water heater--the physical task, not the plumbing part of it

Once again it's time for a new water heater and I find myself dreading the task. The water heater sits on a pedestal that is approximately 18" high (required by code) and lifting a 50 gallon water ...
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3answers
1k views

Code for elevating water heater in garages?

A gas/propane water heater in a garage is elevated. This is to ensure the open flame (at the bottom) is above a certain height (?) to avoid any combustible fuels in the garage from igniting. This all ...
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2answers
41k views

What temperature should I set my water heater to?

When adjusting my water heater, what temperature should I set it to? Is the answer different if you have: Concerns about diseases A dishwasher Young children or elderly that can be easily burned ...