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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1answer
63 views

Can the water heater be damaged if the gas has been shut off?

Can the water heater be damaged if the gas has been turned off for a period of time?
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1answer
24 views

Baseboard water Heater

Gas hot water boiler not turning on past pilot light and click on thermostat for more heat. The flame on the furnace does not turn on. Changed out the Thermocoupler, After starting the pilot light, ...
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2answers
86 views

Direction of flow in radiator

I am about to install a new radiator in my apartment; we removed the old one without noting the direction of water flow. So I now have two pipes sticking out of the floor and I don't know which is ...
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1answer
21 views

The hot water pressure is low in my shower and tub

What would cause the only the hot water pressure to be low only in the shower. The pressure use to always be strong. It's not the shower head.
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1answer
74 views

Hot water twin impeller pump wiring to my boiler

I have installed a new Stuart Turner Monsoon twin impeller pump to increase the hot water pressure in my house. The pluming side of things seems to have gone well, however, I am not receiving any ...
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2answers
70 views

Broken Hot Water Circulating Pump - Shouldn't I still have hot water in showers eventually?

I have a Grundfos hot water circulator. After turning off the main to the house and the hot water circulator the other day to change out a valve for our dishwasher, the hot water circulator hasn't ...
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4answers
80 views

Is a tank-style water heater always under pressure?

Is a tank-style hot water heater always under pressure? In other words, is the entire tank pressurized? Is the pressure largely created by the force of the incoming cold water supply?
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2answers
8k 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 ...
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2answers
114 views

What is coming out of these water pipes?

I have been dealing with some hot water pressure issues. See Should hot water pressure be reduced after hot water is used? Today, hot water pressure reduced so much it was impossible to shower. In ...
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4answers
593 views

How to flush all the water lines in your house

I live in a small (1-traffic-light) town in upstate NY. Some local village water officials accidentally cracked a water main (feeding water to the entire area) and so the Department of Health had to ...
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2answers
81 views

Does the gas water heater in my laundry room require a dedicated vent?

I have been told recently by a potential buyer of my home that due to the gas hot water heater in my utility room, with electric washer and dryer, that I need separate venting to bring it up to code. ...
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1answer
101 views

Should hot water pressure be reduced after hot water is used?

I'm noticing reduced hot water pressure (on all faucets/shower) after significant hot water use (2 long showers, 2 loads of HE (High Efficiency) laundry, and using a sink for about 5 minutes). Cold ...
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3answers
89 views

Do I need to unplug my hot water recirculating pump when I turn off the water to the house?

When I turn off the water to the house (for vacation) and open a faucet to relieve the pressure, I notice that the hot water recirculating pump makes a lot of noise that it doesn't when the water is ...
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3answers
6k views

Using PEX for a water heating system

I am replacing my existing faucet plumbing with red / blue PEX all over the house. Everything that goes to the sink, dishwasher, washer, bathroom sink and so on will be color coded and installed ...
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1answer
25 views

Sulfur smell in one hot water heater, but not the other hot water heater

We have two hot water heaters in our house; one is in the attic and one is in our crawl space. We have a sulfur smell coming from the crawl space hot water heater, but the water smells fine coming ...
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0answers
28 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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1answer
38 views

Venting by gas meter

We're looking at installing a natural gas tankless water heater, but the vent option with it (that would be easiest to install through our solid poured walls) would come out about a foot away from the ...
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1answer
91 views

Tankless water heater requirements

I'm looking at the possibilities of replacing my water heater. Currently we have an electric, 2 element, 50 gallon tank heater that is 32 years old and almost ready to go. The water can sometimes come ...
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5answers
2k views

Prewarming for tankless waterheater

I have a tankless water heater that is just a little bit to small for our new house - the temperature rise isn't quite enough for the winter months. Our basement is big and relatively warm so I struck ...
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7answers
171k views

Why is my hot water running out quickly regardless of other household water usage?

I've noticed that my shower, which used to run hot water for what seemed like forever, now can only produce about 15 minutes of hot water. This doesn't appear to be related to other water usage in the ...
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2answers
2k views

How do I remove a stubborn element from a water heater?

I need to pull and replace the elements in my water heater. The problem is, I can't get the old ones out. My Channellock pliers can get a grip, but slips off pretty easily. Is there something ...
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1answer
72 views

Is it worth it to pay extra for a stainless steel tank water heater?

I'm getting ready to replace my ancient water heater and wondering whether it makes sense to get to a model with a (edit: 316L) stainless steel inner tank instead of one with the standard glass-lined ...
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1answer
133 views

Why is water still above elements after draining hot water tank?

Went to change "element" AFTER draining hot water tank using hose attached to drain nozzle at bottom of tank. Drained for almost an entire day. When I went to unscrew and changed existing element (...
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1answer
32 views
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1answer
36 views

Why does my hot water heater flame and pilot go out?

Why would Kenmore water heater it lights then burner comes on until tank is all hot but after that it won't light again and flame goes all the way out and then I have to manual light the pilot again?
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1answer
41 views

Water heater pilot not staying lit

A customers 70 gallon gas fueled Bradford White water heaters' pilot light goes out immediately after releasing the red pilot button when relighting it. I concluded (in order of most likely suspects) ...
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1answer
262 views

Electric water heater overheating very quickly

We have an electric water heat that recently started heating the water to about boiling. We heard a loud pop one night, not sure if that has anything to do with it. So far we just replaced the ...
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0answers
109 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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5answers
1k views

How high to raise water heater above floor?

I saw a water heater stand at Home Depot but it's about 15" high. That's a bit too high for my basement. Can I just make one with 2x4 and plywood that's only 4" tall, basically just enough to be able ...
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3answers
52 views

Electric water heater power switch

Q1: Should there be a(n emergency) power switch next to an electric water heater? Q2: If A1 is no, is it okay to have one anyway? Q3: If A2 is yes, what kind of power switch should I use? I don't ...
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3answers
22k 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 ...
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4answers
3k views

How to determine gas leak on a water heater?

My gas water heater is certainly leaking gas. I can smell it. Using the image below, it seems like it might be coming from the red circle where the dial connects to the thermostat or the blue circle ...
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9answers
2k views

Is it about time to replace the water heater?

My wife and I just recently closed on our first home. The home was built in 1930 and aged excellently. The couple who we bought the home from had purchased it as a foreclosure in 2006 and made it ...
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1answer
27 views

Are water heater piezo igniters compatible across brands?

Is there really any difference in the piezo igniters used on water heaters? My Maytag has a bad one and they are not available any more, but it and its bracket look exactly the same as this Rheem one. ...
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1answer
1k 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 ...
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2answers
82 views

Does a water heater consume more or less power if one element isn't working?

Will there be more power consumption to heat water in the tank if one of the elements is not working or will it just take twice as long to heat the same amount of water to a preset temperature?
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2answers
165 views

I stripped the thermocouple adapter on the gas valve on my hot water heater so I cannot connect the thermocouple.

I can tell the connection piece has threads, is there a way to unscrew that piece and replace with a new one? The nut sheared off. Is there a way to alternately connect the end of the thermocouple to ...
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1answer
93 views

Hot water is coming out of all faucets brown

I live on the second floor in a condominium and had my direct vent hot water heater replaced approximately 8 years ago. At the time I recall having various vendors out to give me an estimate and very ...
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2answers
4k 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 ...
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0answers
23 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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2answers
2k 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 ...
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2answers
117 views

Can I replace the thermopile with a thermocouple in my water heater, and have it work properly?

I'm having a tough time finding a thermopile at Home Depot, and lowes. I can find thermocouples all day long, and I can rig the wiring so I have no loose ends. However, I know those two units don't ...
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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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1answer
61 views

Plumbing - Particles / Debris In Faucets and Toilets - Water Softener Going Bad?

I had a hot water heater replaced in my house. Shortly thereafter, I noticed that the water flow in one of my faucets near the heater was very low. I wasn't sure, what to make of it, so I had the ...
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6answers
119k 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 burst pipe from the cold spell we're having currently, so I had to turn off the water main to the house until the plumbers get ...
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2answers
197 views

Connecting a water heater, what kind of fittings, valves, and adapters?

I'm buying a new water heater, and quite frankly the series of connections and valves are mind boggling. What I'd like to do rather than soldier the pipes together is to go from compression to thread. ...
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5answers
17k 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 ...
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1answer
2k 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 ...
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2answers
127 views

Hot Water Tank limit switch tripping, but not over heating?

My just over 2 year old, professionally installed gas hot water tank frequently loses the pilot light. I've had the installer come out 4 different occasions to look, and every time, he's stumped at ...
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1answer
22 views

Furnace and Water Heater Ventilation pipe

I have a home that was built in 1924, the pipe that vents my furnace and water heater is green and it is located in my chimney. The top of the chimney is open in my attic, you can see the green ...