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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2
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1answer
80 views

Is my water heater connected to GFCI and is it affected after short circuit?

I am an absolute n00b when it comes to home electrical systems. Please do forgive me if this is a repeat question since I wouldn't know what to search for. I am in France and I have 230V supply at ...
0
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0answers
38 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
2answers
118 views

Why can't I get hot water quickly at my vanity sink?

Whenever I turn on the hot water, it takes 3-4 min to get hot water at the vanity. It takes 1-2 min. for the shower. I have a gas heater. Can it be fixed or does it need to be replaced?
5
votes
4answers
525 views

Replacing a hot water heater: tank or tankless?

We've lived in this house for 20 years and the hot water heater (tank style) was 2 years old, as was the rest of the house, when we moved in. In the last year or two we've started to have occasions ...
1
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1answer
233 views

Could this corrosion be caused by faulty ground wiring?

What might cause slight corrosion atop a tankless water heater's copper topped element assembly? I checked all the grounding and reconnected the two element assembly grounding wires and ensured ...
0
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0answers
29 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 ...
1
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2answers
454 views

Why isn't the water on my second story getting as hot as I'd like?

I purchased a new whirlpool water heater about 2 months ago. I have a two story house, their seems to be a good hot water to the first floor faucets but it seems like it takes a long time for the hot ...
1
vote
1answer
52 views

Switching electric boiler off for months — any precautions?

I have an electril 50-litre water heater (boiler) in an appartement that's going to be abandoned probably for several months. I thought about switching off the boiler's electric fuse to switch off the ...
1
vote
1answer
143 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 ...
0
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1answer
49 views

Why is there no hot water in the kitchen after flushing our water heater?

My husband and I recently moved into a new house that has two water heaters. One is gas and supplies the main portion of the house, the second is electric and (as far as we can tell) only supplies the ...
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4answers
123 views

Leave the water heater on?

When I lived in France and the US, we can an electric boiler for hot water. It was "always on", probably with a thermostat. Now I live in an area where most people have a power switch that they turn ...
0
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1answer
397 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 ...
0
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0answers
33 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 ...
36
votes
7answers
11k views

How can I speed up my slow hot water?

Our water heater (gas) is located in the garage. It is 25 to 30 feet away from the closest faucet, which I'm guessing is the main reason it takes so long -- a minute or longer -- to get hot water ...
0
votes
1answer
128 views

Running computers in basement storage room safely

I have kinda an odd one. I'm mostly concerned about fire safety here and am not concerned about power, I already know how to handle that properly. I have a somewhat large basement with an unfinished ...
3
votes
3answers
757 views

Is there a way to get hot water without altering plumbing or electrical wiring too much?

Is there a way (other than collecting water and heating it on the stove ) to get hot/warm water from the tap without having to alter existing plumbing or electrical wiring ?
0
votes
2answers
76 views

Hot water heating system: Renew or replace?

Our home was built around 1963 and has Gas powered Hot water based heating, some portion of the house is floor heated and some with radiators emitting heat from hot water. The heater may be 10-12 ...
0
votes
2answers
774 views

How should a water heater drain pan be installed on a concrete slab floor?

My water heater sits on a concrete slab floor in my utility room next to a wall with a bathtub drain, and a few feet over from my washing machine drain. When I replace the heater I would like to ...
0
votes
0answers
134 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
1answer
117 views

Would connecting the downpipe to a gas boiler inlet save energy?

I have a condensing gas boiler for tap-water and central heating. Not very far from the inlet there is a downpipe outlet for the sewer. Since this smelly pipe is partially filled with the same ...
2
votes
1answer
146 views

Two Water Heaters - One off affecting the other?

We recently moved into a property with 2 water heaters installed. These were installed less than 3 years ago, so they are relatively new. Now, in an effort to conserve electricity (we are just 3 ...
0
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0answers
54 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 ...
5
votes
3answers
5k 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 ...
0
votes
1answer
80 views

Hot water running out, already replaced both heating elements and both thermostats

Our hot water runs out during one not-too-long shower. By the end of the shower, I have the cold water completely off and the hot water coming out is only lukewarm. My husband already replaced both ...
1
vote
1answer
81 views

How does decalcifying work, and is it something I need?

We recently had to replace our water heater because of lack of hot water, age (12 years to the day almost) and sediment build up (it was higher than the lower element; we purchased the home 7 months ...
0
votes
1answer
123 views

How close can an electric water heater and an electric furnace be to each other?

How close can an electric water heater and an electric furnace be to each other? My water heater is 7 inches from my furnace. I need 4 inches so that I can install a water softener and wash sink. So ...
2
votes
3answers
368 views

Does a thermocouple need to be screwed in to work?

I'm recently having trouble with a water heater. The pilot light with ignite just fine, but will go out after releasing the reset button, even after holding it for over a minute. That makes me think ...
7
votes
4answers
16k views

Why does my kitchen faucet have low pressure after the water heater was replaced?

I recently replaced my water heater, and since then, the water pressure for my kitchen faucet is really, really, low. None of my other faucets seem to be affected (bathroom, shower, etc.). I can't ...
5
votes
2answers
1k views

Why does pressure relief valve state 'Not for Use with Water Heaters'?

So I replaced my 6.5 year old electric hot water (installed with house built in 06') heater and used an identical plumbing setup as my previous install. My previous (and now current) install has a ...
1
vote
3answers
459 views

Combi boiler doesn't realise it's already lit

I have an Ariston Eurocombi (A23). The problem is it doesn't realise the flame is lit. When I start it up and cause demand (run hot tap or turn on heating) it fires up the flame correctly, however, ...
3
votes
5answers
410 views

Is it okay to flush water heater onto the drip pan with drain hole?

Our water heater is on the second floor and we need to have it flushed. It has a drip pan with a hole that has a tube attached to it. Common sense tells me that I can flush the water heater directly ...
7
votes
4answers
3k views

Why is the first shower of the day is colder than the second?

Description Since I've moved into this house, I've noticed that the first shower of the day is colder than the any subsequent shower. More specifically, if no hot water has been used for a while, ...
0
votes
1answer
511 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 ...
7
votes
4answers
21k 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 pipe burst from the cold spell we're having in the states currently so I had to turn off the water to the house until the plumbers ...
0
votes
2answers
160 views

How much distance do I need to branch from water heater?

I moved my washer and dryer next to my electric water heater. I would like to know how close to the tank can I branch the hot and cold water lines. I would like to use a 3/4 to 1/2 inch reducer at the ...
0
votes
1answer
170 views

Why is the pilot on my GE water heater turning off when the burner turns off?

I have 2 GE 28 gallon water heaters, both of which have the same problem. The water heater is turning off after a while, and I have to light the pilot again to got hot water. What could be causing the ...
5
votes
2answers
1k views

How do I prevent harmonic resonance hum in PVC vent of newly installed hot water heater?

I just had a new power vented water heater installed (HTProducts Phoenix Light Duty) in our crawlspace. The contractor that put it in used part of the existing 3" concentric vent from the furnace we ...
3
votes
1answer
295 views

Why does my Rinnai Infinity water heater fire up after turning off the cold tap?

I have a Rinnai Infinity XR20. It's about 3 years old. I've just recently noticed a peculiar issue with it that I hadn't noticed before. If I turn on a cold tap like the one to the garden hose and ...
1
vote
1answer
40 views

possible cause for the water heater being unable to be lighted

The water heater could not be lighted. I tried several times without being successful. What could be the possible causes for the water heater to fail to be lighted. This water heater is only 1 and ...
2
votes
2answers
296 views

How to calculate potential energy savings from using a tempering tank?

I have a boiler (oil) with integrated water heater (3.5 gallon). I don't have problems with running out of hot water but I do wonder if having a tempering tank before the boiler would save money on ...
1
vote
1answer
325 views

How can I prevent a tankless propane on-demand water heater from freezing up in very cold climates?

We are considering installing a tankless propane on-demand water heater in a residential setting, where multiple tenants use a shared bathing facility (presently served satisfactorily by a 40 gal ...
2
votes
2answers
511 views

How can I prevent the intake vent for an on demand water heater from getting plugged?

We have a Navien on demand cold water heater. The intake and outlet vent pipes run out through the poured concrete foundation and have a plastic grill on the end. If the intake vent is blocked in any ...
0
votes
0answers
3k 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 ...
1
vote
0answers
97 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 ...
5
votes
3answers
9k views

Is it time to replace my 20 year old water heater?

My water heater (gas) shows a date of 1991 on it, although the house was built in 1993. There is nothing wrong with it. It is a little slow to heat the water up, sometimes taking almost 5 minutes to ...
0
votes
1answer
349 views

Is this electric water heater wiring correct?

I recently re-wired my water heater from 120v to 240v. I'm not sure why it was wired with 120v to begin with, but it was not providing enough volume of hot water. I looked up basic thermostat wiring ...
2
votes
1answer
63 views

Does a broken TPR valve disable the water heater?

Would the pressure release valve going bad on a water heater cause the water heater to quit working?
2
votes
1answer
4k views

Why is my electric hot water heater producing lukewarm/cold water?

Yesterday after returning home from work I discovered my hot water is not working. When you turn on the faucet (any in the house) just a little warm water comes out and then it turns cold. I checked ...
0
votes
2answers
4k 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, ...