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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92 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
186 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
98 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
5k 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
25 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
147 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
73 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
124k 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
229 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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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
160 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 ...
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0answers
76 views

Hot water no longer coming from water tank (air lock??)

Two days ago I disconnected and capped the water supply to a set of taps for an old laundry sink in my basement. I turned off the cold water supply to the house and also to the hot water tank before ...
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1answer
50 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
90 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
76 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
352 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
40 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
632 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
14k 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
272 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
39 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
46k 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
513 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
91 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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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
44k 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
182 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
56 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
53 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
248 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
142 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
749 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
890 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
85 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 ...
0
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1answer
189 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
409 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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1answer
136 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 ...