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).

learn more… | top users | synonyms

1
vote
1answer
106 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 ...
0
votes
1answer
16 views

Rust in gas flame area of water heater, should be replaced?

There is rust right above the gas flame in our water heater (not outside the water heater as in this question Rust spots on water heater -- time to replace? or on the inside where the sacrificial ...
0
votes
1answer
33 views

What could cause my electric water heater to over heat water?

About a year ago our 15 year old electric water heater heated the water nearly to the boiling point until the breaker on the tank shut off the power. When I reset the breaker the temperature went ...
0
votes
1answer
60 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 ...
0
votes
1answer
193 views

Water heater leaking from the top?

I recently noticed that water is pooling on the top of my water heater. When I took a closer look it appears that the leak is coming from where a metal hose comes into the top of the water heater. ...
2
votes
0answers
85 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
votes
0answers
911 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 ...
1
vote
0answers
66 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 ...
1
vote
0answers
93 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 ...
1
vote
0answers
268 views

Tankless cold water heater and inconsistent water temperature

We recently brought a house that was built in 1927, and much of it has been updated. The previous owners put in a tankless cold water heater two years ago. Our hot water is very inconsistent. When ...
1
vote
0answers
114 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 ...
1
vote
0answers
87 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 ...
1
vote
0answers
638 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 ...
1
vote
0answers
122 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 ...
0
votes
0answers
47 views

Why does my hot water smell like wood smoke?

We live in MN, in a house built in 2008 (and our water heater, installed in the basement, is about that vintage). For the past few weeks, I'm detecting a smoky smell from the hot water out of a ...
0
votes
0answers
37 views

How do I repair a water heater plastic drip pan and what supplies do I need?

How do I repair a hot water heater plastic drip pan, and what supplies do I need? Suggestions on who to call for repair if I can't do it myself?
0
votes
0answers
28 views

hot water tank pressure relief valve

Before leaving on vacation I set the thermostat on my hot water tank to VACATION setting. Having been gone for 1 month, upon my return I set the tank back to my normal setting...Medium hot. I just ...
0
votes
0answers
29 views

Checking the pressure in a Megaflo?

I have a Megaflo cylinder, that looks very much like this one: It is fed from a central boiler system in the building (I live in a new build flat, about 5 years old). The Megaflo provides hot water ...
0
votes
0answers
122 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
votes
0answers
50 views

When should I replace a water heater which appears to be working fine?

Built a new garage. Thought about an on-demand water heater, but decided against it. In our case, it did not seem worth the risk because our area has very hard water and people seem to have ...
0
votes
0answers
2k views

Why won't the burner on my gas water heater light?

I have a Whirlpool 40 gal gas water heater that I got around 2 years ago. Doing dishes tonight, I noticed the warm water was getting colder. When I went to check the water heater, the signal light ...
0
votes
0answers
28 views

Why is the water heating up when it's switched off?

Our central heating is timed to come on twice a day and water heating is off. However, water is heating up. British Gas engineer unable to come up with solution (has changed a valve on hot water ...
0
votes
0answers
191 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
votes
0answers
268 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, ...