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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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Can I connect a water heater relief valve to an unused dishwasher drain?

I am installing a 4 gallon water heater under my kitchen sink. Is there an easy way to hook the t/p relief valve to the old unused dishwasher drain?
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Is a tank less water heater a bad choice for a house with low water flow?

We are thinking of replacing our current natural gas tank water heater by a high efficiency tank less heater. However we have a water main issue, the house is from 1930 and the main is partially ...
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29 views

Can the overflow pipe on the water heater be screwed off to replace it with a longer one?

Can you screw off a water flow pipe and replace it with a longer one that terminates closer to the floor.
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1answer
36 views

Tankless Water Heater - wasting water

It takes a while for the water to heat going to the tankless water heater and in doing that, a lot of water gets wasted. Is there such a thing as a pre-heat switch that would start the heating ...
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1answer
57 views

Hot water heater running out at 50%

I have a 120 gallon indirect water heater. I notice that when I take a shower with a 3 gpm shower head, the water starts to cool after about 20 minutes, which would be 60 gallons or only 50% of the ...
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3answers
52 views

New electric hot water heater, hot water turns luke warm after 12-15minutes of use?

Converted my oil burner to a gas burner and added an electric hot water heater. When i use the shower the hot water turns to luke warm in 12-15 minutes. It was installed by a professional plumber and ...
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I ran out of propane and now the water heater pilot light will not stay lit

I had run out of propane. Now that I have propane, I can’t get the pilot light to stay lit on my water heater, nor will it stay lit even long enough to light the burner. Click for larger view:   ...
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1answer
24 views

What happens if I have two water heaters and one's over-pressure relief valve fails?

If I have two water heaters with pressure relief valves and one heater miserably fails (ie over-pressure relief valve becomes "stuck close" and boiler also works at 100% duty cycle due to, for example,...
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1answer
26 views

Water pressure issues

I've been seeing some strange water pressure in my house, nothing has changed recently. I had always seen the pressure coming out hard at first, after the water heater had been running, but the ...
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2answers
47 views

How to install vent cap over cement pipe?

The picture attached is a cement vent pipe I found on the roof for water heater venting. Looks like the cap has been broken off, but I have no idea what was the original looks like. The diameter of ...
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1answer
20 views

water heater - flow problem

got a new 3 liter instant water heater installed. When the heater is off, water flow is normal. When it is on, about one liter or so hot water flows and then there is no water. What might be the ...
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1answer
41 views

Bubbles in water heater system

My heater stops pushing hot water through the heating loop. The symptoms can be addressed by bleeding the system which always produces a lot of air coming out. The heating works for about 24 hours ...
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1answer
32 views

How to test water-heater thermocouple?

So I took out Kenmore Power Miser 9 burner assembly and want to root cause why the pilot light kept going off whenever I released the RESET button during ignition procedure. Here is the test I did: ...
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1answer
24 views

How to remove combustion door for Kenmore Power Miser 9 water heater?

I removed the two screws on the sides of the door and tubes coming out from controller. However, the combustion door still don't want to come off so that I could service thermocouple (I have seen how ...
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2answers
84 views

How safe are electric faucet water heater? [closed]

I would like to buy one of those electric faucet water heaters for my parents. But I'm very concerned about if they are even safe to use and some questions came into my mind: how is the internal ...
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1answer
40 views

Kenmore Power Miser 9 Water Heater turned off on its own and has become incredibly hard to reignite

This week my 7 year old water heater turned off 3 times and it has become incredibly hard to reignite the pilot light. Here are the observations: When I press the red "RESET" button, I hear ...
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1answer
15 views

How to remove thermocouple from this manifold door?

It has a black object that seems to be secured down by a U shaped clasp. I cannot see how the clasp can be removed. Everything is tight and doesn't appear that a tool can fit anywhere to loosen it up. ...
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3answers
63 views

Small electric water heater below sink to get instant hot water?

There is quite long pipe going from the gas water heater to our kitchen sink. This means that there is a delay before hot water actually becomes hot, especially in winter months. Now I saw that there ...
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0answers
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Immersion heater drip out of oveflow pipe

In my flat I have an immersion heater to heat up hot water. The problem that I am having is that when I leave the elements on for about 30-40ish minutes cold water starts to drip through what I am ...
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1answer
21 views

Installing Vapour Barrier in Crawlspace with Water Heater

I'm installing a vapour barrier over the dirt floor in my crawlspace. There is a water heater already installed and I'm wondering if it's a good idea to tape the vapour barrier directly to the bottom ...
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2answers
81 views

Will increasing the temperature of my hot water cylinder's thermostat make my shower water supply last noticeably longer?

I have an unvented electric immersion heater cylinder which heats the hot water for my household. The capacity is 200L and the temperature is set to 55°C. The water heater is hard-wired to run ...
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1answer
62 views

Heat an outdoor water tank to 10°C? (with an electric heater) [closed]

I have a stock tank full of water in a unheated greenhouse. The greenhouse is located east of Toronto, Ontario, Canada, where the temperatures occasionally go down to -25degC in winter. I would ...
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1answer
87 views

Hot water tank cold water is always flowing

My hot water tank cold water is always flowing and it's losing water out of the temperature valve relief tube on the cold water intake side (see attached photos). I just noticed this, but it could ...
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1answer
43 views

Inconsistent hot water

We are currently doing a full en-suite bathroom remodel. About 2 weeks ago all of the plumbing was completed and about the same time we noticed that we weren’t getting as hot of water in the other ...
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1answer
69 views

I have two water heaters - how can I tell if they are set in series, parallel, or are isolated?

The question says it all - I have a 4,200 sqft house with two water heaters - one on the far side of the house in the garage and the other in a small closet by the master suite. The latter is at least ...
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1answer
48 views

How to check and turn on pilot light of this water tank?

I have never done this before but the gas line was turned off briefly and now we have no hot water. Look like the pilot light went out on this but I have no idea how to see the light and how to turn ...
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2answers
41 views

Rheem Hybrid Water Heater Dead

My one-year old Rheem Hybrid Hot Water Heater (xe50t10hd50u0) is completely dead. Power to the unit is good (full 240v). Screen on the unit is blank. I've pressed the reset button; no help. ...
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1answer
33 views

Best/Quickest way to drain hot water lines from tank?

Due to serious lack of appropriately placed shut-off valves in my house plumbing (not my fault, it came that way), I need to shut off the cold water supply to my gas hot water heater so I can replace ...
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1answer
23 views

why won't my shower regulate water temperature

a couple days ago this started. no matter what position I turn the handle towards the left it's always very hot. and the same if I turn it to the right. very cold. I'm assuming there must be some sort ...
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2answers
208 views

PEX and Hot Water Heater install

OK here's my dilemma. I need to replace my existing low boy hot water heater next to my kitchen sink. It was installed by the builder ten years ago. All the pipe in the house is PEX. The existing ...
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0answers
29 views

Do I need to replace the water heater vent pipes if they have salt corrosion?

I was in my attic improving the insulation and I found that my exhaust pipe for the water heater has salt/corrosion all around the seams. Based on what I found, this is either caused by inadequate ...
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1answer
21 views

Extend sidewall hot water tank vent outside?

I have a power vented hot water tank just on the other side of the wall (and in the basement) from the exterior pipe you see in the picture. The problem is that the steam vents onto my wife's flower ...
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1answer
90 views

Water heater requiring 30A breaker running on 20A

I called a plumber to upgrade my water heater. The current breaker is a 20A. The new water heater requires a 30A. But my wiring is #12. The plumber said, without much conviction, that it's fine for ...
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1answer
26 views

water heater draining hot water continuously from an outlet (seems tp valve outlet to me) [duplicate]

My gas water heater, continuously lets hot water out from the outlet (seems it is connected to tp valve, it goes through the wall to outside the home). If I turn the water heater to low (much below ...
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2answers
75 views

Where to turn cold water off inside the house?

This is somewhat a newbie question as I just bought this house. I assume design of plumbing must be common. So I wonder if I miss something. Below is the "green" valve to shut off hot water into the ...
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3answers
74 views

What breaker configuration does my new on-demand water heater need?

I purchased a on demand water heater.my old heater is hooked to a 20 amp breaker(see photo). Do I change out old breaker to a double-pole 60 amp breaker or do I have to move connection to a different ...
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2answers
120 views

What does it mean to drain into a “laundry tub?”

In the USA my American-made tankless water heater's install manual says that the condensate line can empty into either a drain or a "laundry tub" and then continues to explain that leaving laundry ...
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1answer
131 views

In-floor radiant heating hooked up to hot water tank in new home - questions about how it works and operating it

I've moved into a new 2 story house. The heating system is in-floor water heating, and the heat source is an electric hot water tank. I'm hoping you guys can help me figure out how the system works ...
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1answer
96 views

My hot and cold water are connected in the output of my water heater

Never seen this before, the Cold water is connected to the hot water for the output of my water heater. Any idea what this is?
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1answer
38 views

What is required clearance from mechanical exhaust to garage door?

I'm looking to add a new tankless water heater, which allows for pvc exhaust. In California, USA, I think clearance requirements for a door is four feet horizontally or one foot vertically. Does this ...
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1answer
105 views

Hot water heater T&P discharge going into furnace condensate pump?

I recently had some electrical work done at my house, and as part of that, the power was shut off. After a few minutes, we noticed water coming from the closet containing the hot water heater and ...
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35 views

Is it normal for the sight port of a water heater to ever have condensation in it?

Is condensation in the sight port ever a "normal" occurrence? Or does that mean the pan at the bottom is flooded. I only see condensation, and it won't stay lit. I called plumber out, and he said ...
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0answers
42 views

No hot water in only one bath tub

We are not getting hot water in only one bath tub. The left side is for hot water and right side is for cold. There is no drop in pressure when I turn on only the left side. But instead of hot water ...
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1answer
21 views

Trying to identify cause of minor leak from water heater TPR valve

A few days ago I noticed about a capful of water in the pail at the bottom of my water heater's TPR valve outlet. This is the first time I've had any water come out of the TPR when I wasn't testing ...
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1answer
274 views

Turning water off to house for a vacation, does furnace need to go off as well?

I am going away for a week, I want to shut off all water to my home. I have an oil furnace, with a separate water boiler (connected to the oil furnace - there is no gas in the house). It is summer in ...
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1answer
213 views

Got Red Tag warning from gas company for hot water tank (Canada)

Gas company technician asked me to take a look at hot water tank and there he issued me Warning B Red tag and gave me 5 weeks to fix the issue. Issue in related to clearance from combustibles (TSSA ...
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1answer
34 views

Gas Water Heater will be permanately out of service

Gas Water Heater will be permanately out of service. Pilot & Gas is shutoff. Should I drain the water or leave it or does it matter at all?
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1answer
54 views

Why does my water heater stop heating when some outlets don't have power?

I just bought a house 2 months ago. The water heater has been working fine until now. We experienced some receptacles in our kitchen coming in and out (meaning they'd work and then quit, work and then ...
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1answer
40 views

Hot Water issues in entire apartment, How can I fix this?

We lease an apartment and the maintenance has been less than effective at fixing this issue so was wondering what other people think about it. We've got 2 showers and 3 sinks, this issue is happening ...
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2answers
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Separate or combined boiler and hot water heater

I'm looking to replace my boiler and hot water heater. For background, I live near Boston, my home is about 2000 square feet, we have gas for heat, stove, and dryer, and we are two people in the ...