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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2answers
443 views

How to prevent pressure from dropping from my water heater?

Until two weeks ago, my parents house used one water heater ( noted "1" on the picture) to provide two bathrooms and the kitchen with hot water. The bathroom on the first floor consists of a bathtub ...
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2answers
82 views

Can i use a water heater as my source for the in floor Pex tubing system?

I installed Pex tubing in concrete in 2 areas, both garage floors. I have been told 2 things.... one is that it will require a boiler, two, that a hot water tank will do the job. Cost is a huge factor ...
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2answers
287 views

T&P valve draining - expansion tank issues?

I am having issues with my Water Heater. It's a slantfin tankless boiler (TR-30 PT). It's running on a 4 zone setup. I typically only use one of the zones though. We've been in the home for a year and ...
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1answer
19 views

Water Heater Cold Intake Pipe always drips from drain valve

The cold intake pipe for my water heater has a drain valve with plastic tubing leading to my basement drain. This tubing always has a constant flow of dripping water; basically, my water heater's cold ...
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1answer
19 views

What is causing my gas water heater to make a high pitched noise?

I woke up two mornings ago to water that was colder than usual, so.. I naturally went to check the water heater and the pilot was out, the pilot light has never went out in the 4 years- almost 5 I've ...
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votes
1answer
77 views

Water heater not filled with water before being turned onto hot setting

I had a new water heater installed by a local handy man plumber. My initial concern was tank had 3 dents in it. Was on phone with company (Sears) re: dents, so plumber was delayed some due to phone ...
2
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0answers
38 views

Possible cross over issue with water lines

About 2 weeks ago our hot water started getting less and less hot, now it is completely cold. If I turn the cold angle stop off at the sink, so only the hot water line can feed the faucet, and turn it ...
2
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0answers
97 views

Where could the air in the water system be coming from?

We live on the top two floors of a small brownstone walkup. To get the heating to work upstairs I need to bleed the baseboard heater almost every other day. All faucets in the house sputter, and the ...
2
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0answers
3k views

What could cause my tankless water heater to make a knocking sound?

I recently replaced my water heater with a tankless unit (Rheem). After installation I noticed that whenever I turned on the hot water; or when my central heating unit would turn on, the tankless unit ...
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0answers
56 views

water heater won't stay lit

Looking for suggestions on repairing my water heater. The pilot light won't stay lit. I've cleaned the air intake and checked the venting in the attic but it didn't correct the problem. It will ...
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0answers
35 views

New water heater, now shower goes cold if hot water is used anywhere else in the house

We just replaced a 40 gallon water heater, power vent. The plumbing company said upgrading to code was needed for the plumbing of this water heater. We replaced it with an almost identical model, ...
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0answers
50 views

Could my water heater be causing an electric system failure?

My water heater, a Styleboiler VF 100 SE (1200W), has never had any problem. Recently I bought an electricity timer plug (up to 3500W) to put its plug into, in order to dose the amount of electricity ...
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0answers
65 views

Recirculation pump seems to be working, yet no detectable heat on return pipe

Our two-story-on-a-slab house has uninsulated copper pipes, including a recirculation return pipe to a tee on the water heater drain. In past years, the recirculation seemed to give us hot water ...
1
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0answers
312 views

Why does it take so long for my water to run hot and why does it not last in the shower?

I have a State electric compact water heater model 6-120. When I run the faucet it seems to take a long time for the water to run hot. About a minute or two. When I take a shower I can run the hot ...
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0answers
70 views

Why is the gas water heater pressure valve leaking after installing recirculation pump & old radiator?

Kind of a complex situation. Using gas water heater as a boiler for an old cast iron radiator. In addition we added a recirculation pump. Everything was working fine but then we had leaking from water ...
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0answers
412 views

I've noticed the water from the sink won't heat up, while the water in both bathrooms heats fine.

I've been renting this home for more than a year and there have been a lot of plumbing issues - mostly leaks, but the water in the kitchen has always heated fine. There is a leak under the sink as ...
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vote
0answers
210 views

Can a water heater be installed overhead?

Sorry for the long preamble: I'm doing a remodel which involves building a new attached garage. At the same time, I'm replacing the water heater because it is ancient. I have considered a ...
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0answers
157 views

What would cause a water pressure drop after tripping a breaker?

I recently plugged my laptop into a cheap powerbar, which caused said-powerbar to short. This tripped the "sockets" circuit on the breaker, which, upon resetting, caused power to begin flowing to ...
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0answers
109 views

Why am I not getting hot water from my tankless hot water heater?

I just bought my house last year. The previous owner had just replaced the boiler before I closed. I had oil delivered the day that I moved in. I had problems with the hot water right away as it ...
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0answers
1k views

What dangers are associated with changing the pilot light assembly on a gas water heater?

My A O Smith ProMax gas water heater started going out at various intervals. I would re-light it and it might stay lit for a few minutes, few hours, or even a day or so. I figured it was the ...
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0answers
136 views

Without having a pressure regulator or gauge, how would we determine what psi to set our new expansion tank to?

Without having a pressure regulator or gauge, how would we determine what psi to set our new expansion tank to? We just replaced the tank and hot water heater.Before replacing them, had an ok amount ...
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0answers
19 views

How to shut off both cold water and hot water?

I want to install a new basin tap mixer in my bathroom but I cannot find the valve to off the hot water. I can see the cold water valve is under the sink in the kitchen. Here is the water heater on ...
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0answers
13 views

Getting at water heater anode AO Smith ECT40-200

I found this spec sheet for my water heater which shows where the anode is. However I'm not so sure which of two ports is the anode. Here's a picture. In the spec sheet diagram it seems the anode ...
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0answers
25 views

Why does apartment plumbing make a rattling noise?

I live in an apartment, and recently the electric water heater was dying. There was a small leak and it stopped heating a couple times. It also made a crazy rattling sound like a little snare drum, ...
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0answers
72 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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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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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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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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0answers
60 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 ...
0
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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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0answers
26 views

Solar water heater size

I want to build my own solar water heater. It should heat about 20-30l of water per day to about 60°C. There is about 4-5h of direct sunlight to the place I thought of putting it. How big should my ...
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0answers
35 views

Do I need to replace the thermal expansion tank when replacing a water heater?

I'm considering replacing my water heater. My existing heater has an expansion tank attached to the top; should I look into replacing that at the same time or is the life expectancy on those longer?
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0answers
114 views

water temperature varies in new hot water heater

I have a new house with a gas water heater and a recirculating hot water pump to have instant hot water at all faucets, My water temperature varies from luke warm to very hot. Some times the TP valve ...
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0answers
141 views

Direct Vent Water Heater Flue Exhaust

We recently moved into a property with 2 water heaters installed in the basement. During the inspection, we were told that the water heaters were relatively new, but the exhausts were "odd". ...
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0answers
52 views

Strange configuration for laundry area needs solutions

We are being given the chance to buy the house we are renting, but I have some major concerns where it comes to the laundry area. You see, the washer hookup and gas hot water tank are in a closet ...
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0answers
82 views

Why does the pressure relief valve on my gas water heater open at only 115 °F?

I have a new gas water heater; it is doing the same thing as my old one. The pressure relief (T&P, safety) valve will open at 115 °F or after I take a shower when the water heater is heating ...
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0answers
50 views

Why would the water pressure seem to change after installing a new water heater?

We replaced our water heater recently and in less than 12 hours the TPV started dribbling water out of it. Shortly after the installation we noticed an increase in the water pressure when the toilet ...
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0answers
469 views

Clicking sound from water heater after flushing toilet?

Sorry if this question has already been asked but I have a random question about my water heater to see if this is anything I need to be worried about. To start off I live in an apartment complex and ...
0
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0answers
507 views

Can I reuse an abandoned roof vent?

I have a house that has an old 8-10 inch diameter vent that used to be used as stove/oven vent. I think that newer gas ovens don't require venting like a water heater needs (ie they don't have a ...
0
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0answers
337 views

Running Shower Faucet After Hot Water Heater's Off

I was awoke by a chemical smell from my electric hot water heater. The past two weeks I noticed my shower was not getting/staying very hot during my 10 minute showers. Thinking not too much about it, ...