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
49 views

Should water heaters be turned off (for safety) when not in use?

Is there any safety concern regarding leaving water heaters on 24/7?
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2answers
85 views

Why is the TPR valve dripping on my new water heater?

I recently install a Kenmore #58240 40 gal. electric water heater. I had a 50 ga. approx. 12 yr. old Rheem which started to pop a little so I just decided to get a new one. After I installed it at ...
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1answer
67 views

What is a normal drip rate for a condensing tankless hot water heater?

I have a Tagaki T-H3-DV-N (Indoor) tankless hot water heater. It has a condensation drip spout, and drips about 1 gallon of water per day. Is this excessive or normal? Edit: I've spoken to the ...
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0answers
21 views

Are all boiler heating systems closed?

Are all boiler heating systems closed? In other words, are they all filled with water that is just constantly recirculated, or are there some that put the outgoing water elsewhere?
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1answer
326 views

Suspect water heater is using too much gas

Not sure if this sounds reasonable, but I think the 8 year old gas water heater in the place I just moved into last month is using more gas than it should be. Gas meter recorded 50 therms used last ...
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1answer
16 views

Can I relocate my electric water heater under a basement window?

I am currently making floor plans for my finished basement in Ohio. I had a pipe near a frost free spigot rupture two years ago but that was because of a faulty washer. Is relocating the water heater ...
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2answers
37 views

Can I shut off a second water heater?

I reviewed this question and answer and there's probably similarities to this question, but wasn't sure what kind of setup I have. So I'm hoping I don't get flagged as duplicate. We've got two gas ...
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1answer
587 views

Water tank and timer (UK)

We recently moved into a small flat in the UK. For hot water we have an electric water tank with a main switch and electric timer: I made the following experiments: Main switch on / Timer on – ...
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2answers
13k 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, ...
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1answer
242 views

Thermocouple keep burning out, is it our gas valve?

Thermocouple keeps burning out. Looking at 1 or 2 within 2 week period ! Tried different brands, the pilot will only stay lit for 3 minutes then automatically shuts down.
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2answers
38 views

Water heater on pilot

so I moved into a new apartment last month. The water wasn't very hot so we thought it was just because the weather has been getting cold. Turns out the water heater has only been on pilot, so the ...
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1answer
28 views

closing cold water inlet valve to propane water while away for 2 months

I have a 16 year old State Industries 40 gal propane water heater. It currently works fine (only issue I've ever had was to replace the thermocouple a couple of years ago). However, I'll be away for ...
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2answers
1k views

Can my water heater's relief valve discharge line and drain pan line merge into a common pipe?

Currently, I only have a T&P relief discharge line that runs down to just above the pedestal and out through the exterior wall. I would like to install a drain pan under the water heater. I want ...
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3answers
44k views

troubleshooting a hot tub/spa that won't heat up

We have a Hotsprings/Watkins brand hottub/spa that came with the house we bought last September. At the time that we bought it, the hot tub appeared to work and heat up properly. However, now that ...
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2answers
491 views

Why does my shower run out of hot water quickly?

My shower runs out of hot water quickly. Initially the water is perfectly hot, then it starts cooling after a minute or so and we need to adjust the lever to maintain the temperature. Somewhere around ...
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1answer
6k views

My hot water stopped working in one bathroom, what can I try in order to fix it?

I have an electric water heater from 2004. The hot water works in all other areas of my house (kitchen, other bathroom and washing machine). The sinks and shower in my master bathroom are not ...
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1answer
88 views

Install of tankless water heater

I want to install a tankless water heater. Have a 125 amp panel, with two 30 amp breakers for the current water heater. Install manual recommends having two 40 amp breakers. Max draw is 75 amps. ...
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0answers
59 views

Solar Panel Collector type for Caribbean

I live in the Caribbean and am looking to get a solar water heater system. I’m looking into flat panel or evacuated tube system. I got an offer for an evacuated tube system with a stainless steel tank ...
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7answers
801 views

Replacing a water heater--the physical task, not the plumbing part of it

Once again it's time for a new water heater and I find myself dreading the task. The water heater sits on a pedestal that is approximately 18" high (required by code) and lifting a 50 gallon water ...
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3answers
2k views

Code for elevating water heater in garages?

A gas/propane water heater in a garage is elevated. This is to ensure the open flame (at the bottom) is above a certain height (?) to avoid any combustible fuels in the garage from igniting. This all ...
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2answers
43k views

What temperature should I set my water heater to?

When adjusting my water heater, what temperature should I set it to? Is the answer different if you have: Concerns about diseases A dishwasher Young children or elderly that can be easily burned ...
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2answers
177 views

50 Amp tankless water heater and 30 amp double pole switch

I just moved into a house. I have a 50 amp max tankless water heater. The circuit breaker is 50 amps. The water heater is connected to a NEMA 10-50 power receptacle. There a switch to turn on and off ...
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1answer
60 views

shower shock,when hot or cold water is used in other parts of house

our 2 showers, we can't run any other hot or cold water without get extreme hot or cold differentials while in the shower.bought house last year,built in 1985.
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1answer
54 views

Does a water heater have to be completely full for the water to heat?

We installed a new water heater and it is not hot. We think it is full. Does a water heater have to be completely full for the water to heat? We think we may possibly have a leak in the hot water ...
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1answer
50 views

Draining Water Heater

Recently, my water heater started leaking from the top edges. I can see rust lined up all along the outer rim on the top, and water is very slowly trickling out. I've made an appointment with a local ...
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3answers
4k views

Properly venting a gas water heater

Ahh, the joys of an old house. The former owners of my house did some funky stuff with venting the water heater. Let me explain: the water heater is in the basement there is a 3 in single walled ...
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1answer
238 views

Will an inline tankless heater help my 50 gallon water heater fill my 70 gallon tub?

I've been working on an issue with my remolding plan. I want to get a 70 gallon tub, but I currently only have a 50 gallon water heater. The water heater is only 2 years old and is fairly nice, but I'...
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2answers
138 views

Is this a Direct Vent Water Heater?

My contractor asked me to choose a direct vent water heater and have it delivered. I (generally) understand the difference between direct vent and power vent, having read up on how they both work. ...
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1answer
617 views

How hot should my hot water heater vent get?

My gas hot water heater's flue/vent is very hot to the touch. Is that normal? How hot should it get?
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2answers
800 views

Do I need a regulator to connect a tankless water heater to a 20 lb. propane tank?

I am going to hook a tankless water heater to a 20lb propane tank. Do I need a regulator coming off of the propane tank?
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2answers
83 views

Need help understanding gas water heater

I just bought a house and it have a gas water heater. I need to know what is the water shut off valve to shut down water in the entire house. Also if you can help me label any of the other knob (which ...
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1answer
182 views

Water Heater Gas B-Vent Install

I installed a new water heater and want to vent it right. The old water heater used ABS pipe since it had a blower. Basically I have a 3" b gas vent pipe coming in and connecting to a flex gas pip ...
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1answer
34 views

Water Heater PRV keeps opening

I have a water heater that is 20 years old. When we turn up the water temp the pressure release value opens and drains water into the overflow pipe. The issue is this then overflows from the top of ...
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3answers
66 views

How should I install a new water heater?

I have recently shifted to San Diego. I am planning to install my own water heater. Can anyone guide me on below questions: Should I place my water heater next to furnace? Should I have a common ...
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1answer
388 views

My water heater pilot turns off after about an hour

I light the pilot on my water heater, turn the knob to on and the burner ignites and heats water. When the burner shuts off, the pilot light goes out. About two years ago the water line above the ...
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0answers
27 views

Solar water heater size

I want to build my own solar water heater. It should heat about 20-30l of water per day to about 60°C. There is about 4-5h of direct sunlight to the place I thought of putting it. How big should my ...
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1answer
122 views

Why do high efficiency water heaters require outside air vents and drains?

All high efficiency water heaters seem to require PVC air intake and vent; the existing water heater I have doesn't have a drain connection or intake vent; only a traditional chimney. What are these ...
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1answer
37 views

water heater vent

In the water heater closet, the water heater is vented through the roof. There is a vent pipe that goes through the floor in the same closet. What would this vent pipe be for and can I cap it off as I ...
3
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1answer
127 views

Dropped Item in hot water heater

When I was redoing the plumbing to my hot water heater I accidentally dropped a pen cap down the vent stack/flu. Will this cause any problems? Like melting or catching on fire? Its going to take a ...
4
votes
1answer
426 views

How bad is it to attach a gas water heater to a gas furnace electrical circuit?

I'm looking to replace my existing water heater with a more efficient model. One of the things that makes better models more efficient is the replacement of the thermocouple / pilot control system ...
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0answers
38 views

Do I need to replace the thermal expansion tank when replacing a water heater?

I'm considering replacing my water heater. My existing heater has an expansion tank attached to the top; should I look into replacing that at the same time or is the life expectancy on those longer?
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2answers
103 views

How do I know when my water heater should be replaced?

The condo I just moved into has an original 2001 gas water heater that is missing a few features one would like to see in 2015, such as inspectable anodes. The home inspector pointed this out as a ...
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2answers
107 views

How can I adjust the temperature of my hot water?

I live in California and the winter has been a lot warmer than expected. I would like to decrease the water temperature in my home to try to save money and conserve energy. How do I do this?
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1answer
168 views

Hot water tank leaking at bottom could it go from a trickle to a gush?

My 20 yr. old gas water heater that's located in my basement has had a slow leak for 6 mos. My husband doesn't feel the need to replace it yet and feels we can just continue soak up the water with a ...
3
votes
1answer
2k views

Why does my gas water heater's pilot light go out when I replace the outer door?

I have a 9 year old Bradford White gas water heater, model MI403S6FBN4. The pilot light went out today, and when I went to re-light it, it stays lit while the pilot button is held down, and it stays ...
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1answer
98 views

A line T-ing off my water heater drain line. What might it be for?

There is a line T-ing off of the DRAIN line at the bottom of my water heater and I don't know what it is for. It is UPSTREAM of the valve that I need to open annually to remove sediment from the ...
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1answer
63 views

Feedback on why constantly draining. It's starting to flood backyard

There's no leakage near/ around water heater. No slime or build up of any kind. But there's constant hot water drainage coming out through pipe in backyard. It's starting to flood back porch area. It'...
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3answers
20k views

What can cause an electric water heater to stop working?

Last night my electric water heater stopped working and I'd like to figure out whats wrong with it before going off and calling a repair service. What are some things I can do to troubleshoot this? ...
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3answers
11k 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 ...
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0answers
64 views

water heater won't stay lit

Looking for suggestions on repairing my water heater. The pilot light won't stay lit. I've cleaned the air intake and checked the venting in the attic but it didn't correct the problem. It will ...