Questions tagged [water-heater]

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
48 views

No hot water if hot water recirculator pump is shut off

I'm a newbie to the site and posted a question last week regarding help with wiring a Honeywell L6006C Aquasta to a Taco 006-BC4 Hot water Circulator Pump. That question was answered quickly thanks to ...
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18 views

Can gas water heater thermostat temperatures drift?

I have a gas water heater about 15 years old, I flush it about once a year. The water seemed too hot ( measured 135 F at a faucet) , it had not been that hot before. There are about 10 temperature ...
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20 views

Honeywell L6006C Aquasta wiring to a Taco 006-BC4 Hot water Circulator Pump

I have a Taco 006-BC4 hot water circulator pump installed on a mechanical timer and its been working fine. However, I would like to install a Honeywell L6006C Aquastat to drive the pump so I could ...
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39 views

Gas water heater burner flame goes orange as I turn temperature dial up

I am a new homeowner and am attempting to light a gas-powered water heater. I am following the directions step by step and have been able to get the pilot light lit with the temperature on the lowest ...
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2answers
1k views

Why is water running into my water heater when cold water inlet is turned off?

I'm installing a new water heater. The cold water inlet is turned off and no water is running in the house. After attaching the hot water outlet to the water heater I can hear water flowing/dribbling ...
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Water heater won’t lite - replaces thermopile

I replaced my thermopile after my water heater was displaying a 4 blink message (too hot). Now the pilot won’t light. What have I done wrong? Should I be concerned about continuing to mess with it?
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3answers
56 views

Solar water heater vs Heat pump for heating water?

I'm debating between installing a solar water heater vs. a heat pump for supplying hot water to my house. The house is in Bangalore, India - we have about 300 days of sunshine in a year. My estimate ...
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2answers
66 views

Are the cold and hot water circuits typically isolated in residential plumbing?

I have a shutoff valve on the cold side of the water heater inlet. I also have a water main shutoff valve coming from my well. Are the cold and hot water lines in the house independent of each other ...
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56 views

Single cylinder set-up for geothermal heating and hot-water

I am looking to install a geothermal heating system to provide hot water and heating in a small home. I am aware that constant cycling of the geothermal heat pump is not desirable, so it is usual to ...
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1answer
49 views

What size wrench do I need to remove home water heater TPRV?

I'm trying to remove the temperature and pressure relief valve of a water heater. The problem I'm having at this point is the actual removal of the valve from the heater unit. I've removed the ...
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2answers
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Water Heater Exhaust - how to connect the 3 inch hood to four inch exhaust pipe

I'm working on this gas water heater with 3" hood almost attached to an elbow that reduces from a 4" exhaust flue. This was only attached by a lot of aluminum tape. The problem is that the ends of ...
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5answers
156 views

Making sure only one of electric shower or instantaneous hot water heater can operate at once

I'm completing the renovation of an annex. The annex shares the mains supply with the main house which has a single phase connection rated as max 90A. I'd like to fit an electric shower (9.8kW) and an ...
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1answer
45 views

Unconventional thermostat wire labels on boiler

I have inherited an electric boiler for heating water in pipes running through the house. The existing thermostat is a very old and very simple mechanical one. I want to install a more recent ...
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4answers
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Hot water last long time everywhere but in my shower?

Hot water last long time everywhere but in my shower? Hot water only lasts about 10 minutes in shower but lasts forever in kitchen and bathroom sinks! How can I fix this?
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A new boiler and the shower has no hot water. Cold water flow is fast. Any ideas on how to fix the problem?

I have a new Viesmann 50-W boiler installed two days ago by an engineer from a company. There is no hot water when using the shower (upstairs) because the boiler does not turn on to heat the water. ...
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Is it necessary to shut off the water supply to a radiator in order to replace a radiator valve?

There are barely any instructions in the manual. Do I need more than a spanner to do replacement? Is it necessary to shut off the water supply to the radiator in order to replace the radiator valve?
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Cleaning larger sediment out of electric water heater

It's been a few years since I flushed my water heater and I recently went to do it and it's only dripping slowly, not running and flushing. Possibly related, in the last few months we've been running ...
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2answers
128 views

Black greasy specks in sinks, dishwasher, etc. at home

We have been noticing black specks that leave a greasy trail when smeared in our bathroom sinks and on dishes washed in the dishwasher in recent weeks. After some research, I find that the 2 main ...
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1answer
78 views

What is this pressure release drain funnel?

In a new construction home, there's some plumbing that I'm not familiar with. It looked like a funnel drain to me. The builder described it as a "pressure release and condensation drain for the ...
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5answers
34k views

Why does this pipe feeding a hot water heater dip down like this?

This is a cold water pipe just in front of the hot water heater it is feeding. Why is it shaped that way? What is its function?
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1answer
80 views

Battery backup system for tankless gas water heater (outdoor install)

I have a Takagi T-K3-SP tankless gas water heater, which is installed outdoors. It still needs electricity though, so when I lose power at home, there's no hot water. The manual states it uses 86W ...
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1answer
66 views

Unplugging a Gas Water Heater Daily

I only use hot water once a day to shower. Recently, my 16 year old Bradford White gas hot water heater has taken a turn for the worst, and will only put out a little hot water at a time, and, ...
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1answer
67 views

Kitchen faucet gives hot water when I close the cold tap

I have a faucet in the kitchen sink that is provided cold water. There is a pipe from the faucet to the electric water heater, and then a third pipe to feed the hot water back to the faucet. When the ...
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2answers
193 views

Why does my kitchen faucet have 3 pipes?

My kitchen sink has a peculiar setup I haven't seem before. The faucet has 3 pipes and there is an electric water heater under the sink. The first pipe brings cold water into the faucet. The second ...
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2answers
44 views

RINNAI Water Heater Flush Procedure

I want to flush my tankless water heater (DIY). I've never read plumbing schematics before. Which one of these is the "V1" value they are referring to in the doc? (And have I correctly identified ...
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1answer
81 views

Can a heat pump water heater be vented to the attic?

This is a very different question than venting a bathroom fan or clothes dryer to the attic (moist air), as the heat pump takes humidity out of the air (routes it to a condensation drain). The ...
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2answers
57 views

Hot Water Heater leaks through drainage spigot after flushing

I flushed my hot water heater several months ago. Ever since, it has leaked through the drainage spigot. I've tried to tighten it to a point where it looks like it stops, but it starts again soon ...
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3answers
32 views

Pressure relief valve putting out water

My water heater has been draining out large amounts of water which I understand is caused by the water temperature being to high. How do I address this issue so that it won’t continue?
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1answer
56 views

Can I use a shorter length anode rod?

I have a 6 year old 80 gallon American water heater, looking to check/replace the anode rod for the first time. It currently has a 3/4" aluminum anode rod, 52" length. I need a flexible anode rod, as ...
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1answer
49 views

Hot water heating recommendation

I'm looking for a recommendation on the best course to update our hot water heating system.Some background: When we moved into our upstate NY, 2200 sq. ft. home five years ago, the home was heated ...
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1answer
37 views

Proper Setup for Water Heater Gas and T&P Relief Valve

I will be replacing my water heater soon and want to get two clarifications. First, is the only issue with the current gas line that a sediment trap is missing or is there anything else that needs to ...
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2answers
55 views

High water pressure issue from hot water heater

Hoping someone can help me with this weird issue I am having with the water pressure at my house (at least seems weird and mysterious to me). This is an issue that started happening about 6 months ago....
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2answers
99 views

Why am I getting hum and lights dimming with a new electric tankless water heater?

So, I just installed an electric water heater and I'm getting a light hum from the water heater and the breaker panel. It's also dimming some lights.. unevenly. It seems to be more noticeable when the ...
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2answers
47 views

question about supplying gas via multiple lines to a water heater

We moved into a new construction home a few months ago. The house has what I believe are 1/2 inch flexible gas lines running from a basement manifold to various appliances (water heater, two different ...
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137 views

Can I shut off the water to my house and safely leave the water heater on while I'm away on vacation for a week? [duplicate]

I plan to shut off the main water supply to my 2 story house before leaving for a week on vacation. I have an AO Smith gas 'powervent' water heater in the garage that I would like to set to 70*F ...
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1answer
74 views

What advantage is there to a larger hot water tank with a lower FHR?

This Rheem spec sheet shows that their 40 gallon tanks have a higher first-hour rating than the 50 gallon: 86 compared to 78. If this is true, why do the 50-gallon ones exist? By what metric are they ...
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2answers
98 views

Home water pressure consistently exceeds 150 PSI

Background: When I bought my home it had a 50 gallon gas water heater in the garage without an expansion tank. On the hot water line there is a Watts adjustable pressure relief valve (this NOT the ...
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0answers
66 views

Why does my tankless water heater turn off when I open the cold side of the faucet?

Just got a new Canon tankless water heater. I was wondering, why does the heater go out when I turn on a cold water knob while the hot water knob is still open. Like, I'll turn on the left/hot water ...
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3answers
105 views

Is it ok to run a 30A water heater circuit on #12 wire?

I moved into a 50 year old home about 2 years ago and we’ve been using a (miraculously working) water heater from 1994. Yesterday, its life finally came to an end when I found it had sprung a leak in ...
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1answer
47 views

Circulation pump doesn't give enough hot water

I just got a new 50 gallon water heater and my circulating pump would only keep the hot for 1 shower (progressively getting cooler until completely cold). When I turned off the circulating pump the ...
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51 views

Upstairs shower not getting water

I have a weird one and may not be related. Came back from vacation and my basement was partially flooded from the Water Heater (looked like it was leaking from the bottom). As I was cleaning it up, ...
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163 views

Water Heater not getting 240v?

My water heater stopped working a few days ago and I've been trouble shooting it ever since. I found water in the connection receptacle. the leak from the the Air Conditioning unit above it has been ...
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1answer
48 views

Re-routing discharge pipe from hot water heater's T&P relief valve

Our new construction home (completed build in August 2018) in northwest Georgia (about 40 miles NW from Atlanta) has an electric water heater installed in an alcove in the corner of the garage. The ...
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33 views

Water Heater in crawl space

I am concerned that the hot water heater and furnace in the duplex I live in is not up to code. They are installed in a crawl space which is “maybe” 4 feet high. The space is dirt & the water ...
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2answers
56 views

Breaker Breaker, Which should I use?

I have setup a new water heater where I used 10-2 wire to a disconnect box. Then, connected a square D 30 Amp dbl pole in my breaker box. Water heater connections were black to black white to red and ...
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30 views

Connect boiler Wifi switcher

I want to connect boiler switcher, in the wall I have 4 wires, 2 live, neutral and earth, but on the wifi switcher it needs L(in) L1(out) N1(out) N(in) as shown in the pictures, How can I connect it?
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Shut off cold water supply valve on the heater, now can't turn it on

The valve just spins freely. What could be the problem? I'm getting cold water pressure just fine but only an extremely weak flow of hot water. Tried different fixtures. I don't know why this happened....
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15 views

White residue on flow heater pipe

My flow heater (Vaillant VED E 18/7) stopped working when I switched a breaker off. Upon opening the casing, I found out two things: 1: The water intake pipe has a small white discoloration and seems ...
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22 views

Bradford White Water Heater Loud Noise (No vibratrion; Exhaust sound)

Tonight our hot water heater starter making a loud noise that sounded like gas escaping from the bottom of the unit. I've provided a video for reference. I'm an amateur when it comes to this stuff, so ...
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4answers
5k views

How do electric hot water heaters explode and what can be done to prevent that from happening?

My neighbor and good friend is a union steamfitter, and general handyman. He had to replace his electric hot water heater last year and he did it himself. My wife and I have to replace ours now, and ...

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