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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4
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3answers
3k views

Rust spots on water heater — time to replace?

So I noticed today there's some rust spots showing up on the outside/bottom on the water heater. No more than a couple specs. Should I be worried?
2
votes
1answer
931 views

What is causing the high limit switch to pop on my electric water heater?

The high limit switch has popped twice on my electric water heater, both times at night. I reset the switch and the water heats and it's ok throughout the day. Wake up in the morning and it's ...
6
votes
2answers
3k views

What are the symptoms when 1 of the electric water heater elements goes kaput?

I suspect that something has gone awry with the electric water heater. We do get water that is plenty hot, but it doesn't seem to last as long as it used to. My suspicions are further aroused because ...
4
votes
2answers
2k views

Should my water heater drip constantly?

My wife was home today during a follow-up visit from the sump pump replacement we had as a result of my sump pump issue. After solving the problem, the plumber opened a the release valve from the ...
6
votes
3answers
3k views

How do I troubleshoot a water-heater?

Lately our hot water has been running out very quickly, a lot quicker than it used to. I have an Whirlpool electric water heater with 2 elements with the top element has a reset switch. I followed ...
2
votes
1answer
631 views

Why does my Paloma tankless water heater turn off randomly without errors?

We have a Paloma Tankless water heater, model: PTG-74PVN that shuts down when in use for a few minutes. There is no code displayed on the screen, it just powers down. This started happening a few ...
1
vote
1answer
4k views

What can cause foggy/misty/gray water when water heater is turned off?

This may be expected behavior but I thought I'd ask anyway... We recently had gas turned off at our house in preparation for a fumigation this weekend. We have a gas water heater (with a tank) so ...
3
votes
2answers
1k views

How do I improve hot water pressure from a gas combination boiler?

I have a gas combination boiler (no hot water tank). The hot water pressure isn't very good though - the showers and hot taps come out with maybe half the pressure when compared to the cold straight ...
1
vote
2answers
756 views

Can I vent a dryer from the same mechanical closet as a water heater.?

I'm currently looking at a condo to purchase and the existing "closet" that contains the plumbing and venting for a washer/dryer is a bit on the small side. It's probably not that big of a renovation ...
17
votes
1answer
387 views

Is flushing a waterheater a good idea?

I've been told that water-heaters build up sediment at the bottom over time, and should be flushed out (ie. drained, then allowed to refill). Is there value in this exercise? Does that value exceed ...
8
votes
3answers
846 views

Are water heater blankets a good idea?

Is it a good idea to wrap a water heater in insulation? Does it lower the heating cost? Does it shorten the life of the water heater?
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 ...
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 ...
11
votes
3answers
2k views

Are tankless water heaters worth it in cold climates?

I was thinking of switching over to a tankless water heater, but a friend of mine said they are not good in colder climates since the water coming in is colder and takes longer to heat. Is this a ...
13
votes
4answers
858 views

Which water heater types do you recommend?

I would like to upgrade my current water heater with one that Is able to produce/store more heated water so I won't run out Energy efficient Inexpensive What are the advantages/disadvantages to ...