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

4
votes
1answer
75 views

Does a larger solar water heater equate to better water pressure?

Please excuse my ignorance - we want to buy a typical slanted rooftop solar water heater for our home. We thought 200L would be an acceptable capacity, but the vendor we visited today said that we ...
2
votes
1answer
120 views

Is it time to replace my water heater?

I have a 20+ year old, 115 gallon, electric water heater. Works like a champ, but I'm considering replacing it for a couple of reasons. It's leased - I pay $20/mo. It's 115 gallons for a house with ...
1
vote
0answers
123 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 ...
3
votes
3answers
2k views

What advantages does bending copper pipes have over joining many parts without brazing?

These questions are in context of a DIY solar water heater I am planning (another separate question). The copper pipes in question, are supposed to carry around hot water using thermo-siphon ...
1
vote
1answer
416 views

How should I avoid corrosion at this water heater connection?

I installed a new water heater 2-3 years ago. I put 3/4 pipe to PEX adapters on it and then used pex to connect to my house. On the hot water outlet, corrosion and rust is forming. I bought some ...
8
votes
2answers
12k views

How does Thermal Release Device (TRD) work

Rheem hot water heaters have a device in the combustion chamber called Thermal Release Device (TRD). It contains a vial filled with liquid that seems to be mounted in a flex metal plate. It is a ...
1
vote
0answers
896 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
97 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 ...
2
votes
2answers
193 views

How can I fix this leaky water heater?

I have an electric Water heater and it is starting to leak from what I believe to be the pressure release valve. I just wanted some tips on how I can fix this before the leak becomes unmanageable. The ...
1
vote
2answers
110 views

Is it practical to install a second water heater near my kitchen?

My bathroom and my kitchen are very far apart in my house. The original water heater is in the bathroom. Is it practical to install a second water heater (small) near the kitchen so that it runs (the ...
2
votes
1answer
188 views

What to look for in a new water radiator?

The water radiators I have under each window are 50 years old, and I would like some new ones. They measure HxLxD 50x100x20 cm. The new ones I would like should be as thin as possible. I live in an ...
4
votes
1answer
516 views

How to determine tankless water heater requirements?

I'm considering replacing my insufficient 30 gallon gas water heater with a tankless water heater equivalent to 50 gallon gas heater. I know a 50 gallon heater would serve my needs. Questions ...
3
votes
3answers
15k 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 ...
2
votes
1answer
256 views

How can I improve my hot water heater's performance?

I don't have the equipment details on hand but could probably get them if needed. It's a pretty standard boiler + hot water heater + pump set up. Often the hot water coming out of the shower faucet ...
2
votes
1answer
703 views

Can replacing a T&P valve be done as DIY by a home owner?

I want to replace the T&P valve on my gas water heater since it is dripping water all the time. I talked to a couple of people such as my friend and a salesperson at a Home Improvement Store. They ...
2
votes
1answer
402 views

Why does the hot water run cold at less than 'full throttle'?

I'm as environmentally conscious as the next American (probably not very) but here's an example: I like to rinse dishes that I've just washed in a stream of hot water as this works best for drying. I ...
2
votes
0answers
88 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 ...
4
votes
1answer
6k views

Can a washer and dryer be next to a water heater?

I have a GE gas dryer (DSXH47GGWW) that is currently next to an exterior basement wall. I'd like to move it to the opposite wall (shared with the crawl space) right next to the water heater next to ...
6
votes
4answers
3k views

Should I install an inline water heater for my bathroom?

It takes 3-4 minutes of the shower running before the hot water reaches my upstairs bathroom. I'd like to not have to waste all that water and time. My initial though was to install an inline water ...
2
votes
1answer
356 views

What's with the different FHR ratings of these hot water tanks?

We're replacing our tank with a more efficient one and we can't go tankless given the cold input temperatures in Canada and the amount of output we need (for a triplex with 7 people). So I've been ...
4
votes
2answers
993 views

Should a water heater's anode be replaced?

I hear conflicting information on replacing the anode bar on a water heater or not since the water heater will be replaced anyway. Should the anode bar be periodically replaced? Why? How often?
1
vote
1answer
58 views

How do I replace a damaged valve on a water heater?

Near the bottom of my hot water tank there is a plastic valve that looks like it is used for draining the water out of it. It has developed a hairline fracture along the length of it and small jets of ...
-1
votes
1answer
2k views

How long will it be before my hot water heater blows up without a thermal expansion tank?

the county where I live put in the "check valve" or backflow device. Not sure, but I know they said you need to get a thermal expansion tank or the pressure could blow up the water heater. I spoke ...
2
votes
1answer
103 views

How do I start a cold gas heater?

The gas heater pilot light has been out for a couple of days, and I believe there is a safety mechanism that detects this, and shuts off the gas. Now, when I move the slider to the pilot light ...
2
votes
1answer
249 views

Why does my water heater stop after a few minutes?

I have a Junkers (European water heater) that works for a few minutes and then stops. Anyone have experience with this/know how I can troubleshoot? Or, would a regular plumber be able to fix it?
3
votes
1answer
3k views

What could be causing water to drip from the relief valve of my new gas water heater?

My old hot water tank met its maker about two or three weeks ago, and since then I have installed a new Kenmore 50 gallon gas water heater to replace it. The new water heater seems to work fine, I ...
4
votes
2answers
15k views

Why is my new hot water heater making a clicking noise?

I have a relatively new water heater (installed by previous owner). I've only been in the house a few months and did not notice this noise until after being there a few weeks. What happens is after ...
6
votes
2answers
2k views

How to install Water Heater drain pan to sump pit?

I want to replace my electric water heater. The current water heater does not have a drain pan. I'd like to add one with my new water heater. This is all in the basement. Our basement does not ...
1
vote
0answers
128 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 ...
1
vote
2answers
787 views

Is my expansion tank leaking in my oil water heater system?

I have an oil water heater (see related question) used for a hydronic forced-air furnace. There is a backflow preventer on the incoming cold water and return hot water, and a small expansion tank on a ...
5
votes
4answers
3k views

Can I install a hot water recirculation pump if I have a reverse osmosis filter?

I'm considering getting a "comfort pump" which will pump water from the hot line to the cold line under a sink so that there is no waiting for hot water, as well as saving the wasted water. My ...
2
votes
1answer
2k views

Why won't my gas water heater light?

Everything was working last night but no hot water this morning. Things I have checked: gas supply to the house is fine electricity is going to the boiler fuses are good sounds like the water pump ...
2
votes
2answers
2k views

What could cause a new pressure release valve to drip water?

Installed a new pressure release valve on electric water heater because old valve was dripping water on floor. New valve also dripping water. Any ideas? Suggestions? Water temp set at 110F, so it's ...
0
votes
1answer
393 views

Can I repair the floor in the water heater closet with an old street sign?

Can I use an old aluminum road sign as a replacement floor for my hot water heater closet? The old floor is rotten and has some give to it right where a portion of my hot water heater sits, and my dad ...
1
vote
2answers
5k views

How can I stop the boiler from heating the radiators when only hot water is wanted?

I have Baxi Boiler (model unknown at this precise moment in time) which British Gas have fixed up to a seperate control panel (see image - not our actual panel, image from Google!). The problem is ...
1
vote
1answer
339 views

Replace under warranty Bradford White or get a new Rheem water heater? [closed]

I have a Bradford White water heater that is about 4 years old, still under warranty, and has started leaking. My understanding is that it must be replaced. The plumber I contacted about this told ...
1
vote
2answers
254 views

Can I replace my oil-based water heater with several electric ones?

I was looking at this question, which is somewhat related to mine but didn't give me a good answer: How to evaluate the suitability of an electric tankless water-heater Basically, my mom's water ...
8
votes
1answer
183 views

How to evaluate the suitability of an electric tankless water-heater

I'm trying to evaluate if an electric tankless water-heater would be suitable for my home. There are just too many variables to consider, and I wonder if there is a mathematical approach to it. I'm ...
4
votes
3answers
2k views

Should we turn our oil hot water heater off every night?

My husband and I are considering shutting off our hot water heater from 8pm to 8am every night to save on energy. Is such a time frame long enough to create a noticeable difference in our oil bill? ...
4
votes
3answers
8k views

Is a gas water heater safe in a bedroom?

My existing water heater is electric and is likely to need replacing soon. The heater is in a converted garage that I use as a guest room. As the house is piped for gas, I'm considering the purchase ...
4
votes
1answer
978 views

What could cause a clicking noise in an electric water heater?

I get clicking sound from our electric water heater as well. it lasts for a while, then stops...then starts again, etc. we recently had technician out who said it needed to be cut back on the setting ...
3
votes
1answer
532 views

Can I reuse cold water copper pipes for hot water?

I have a segment of copper pipe for supplying cold water to my gas heater currently. It runs inside a wall so I don't want to replace it. Now I need to change the piping and want to reuse that ...
4
votes
3answers
530 views

Calculate savings from/cost-effectiveness of installing a tankless hot water heater?

Following up on "Which water heater types do you recommend?" and "Are tankless water heaters worth it in cold climates", is there a way to calculate the point at which installing a tankless water ...
2
votes
2answers
8k views

After installing expansion tank, massive buildup of pressure then a trickle?

I am completely stumped. You guys helped me out a lot with my previous question here: New gas water heater dripping relief valve, have expansion tank, what gives? Turns out the expansion tank ...
2
votes
1answer
357 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 ...
4
votes
1answer
4k views

Are galvanised steel pipes suitable for supplying hot water?

I am living in an old building where the old galvanized steel pipes are still in use indoors. Rather than upgrading to copper pipes, can I reuse these galvanized steel pipes for hot water (from a ...
1
vote
2answers
622 views

Sizing DHW expansion tank for tankless heater

I have a combined boiler for hydronic heating and DHW. Earlier in the winter, I started insulating as much of the pipes I can easily access. This has led to hot water coming out of the cold water ...
0
votes
0answers
290 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, ...
2
votes
1answer
737 views

No hot water, but exhaust blower running continuously

This morning I went to take a shower and there was no hot water. I went to the basement to check on the water heater, and found the exhaust blower is running continuously but no hot water is being ...
2
votes
1answer
2k views

Is corrosion on top to an otherwise working electric water heater dangerous?

I moved into a house with an electric hot water heater. The heater is old (11 years) but works just fine. However, the top of the tank has extensive corrosion, especially around the connections for ...