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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37 views

Water heater not producing hot water but everything seems to be working?

We just bought a house and the previous owner had a brand new water heater installed. The first day we took a shower it was not very warm and the next day there was no hot water at all. I checked the ...
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2answers
73 views

Is it safe to set my water heater tank to vacation during winter time? What else can I turn off to save heating bills during winter?

Is it safe to turn set my water heater tank to vacation during winter because I am mostly away from my house? I live in Canada. What else can I turn off to save heating bills during winter when I am ...
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1answer
42 views

How will a hybrid water heater perform in less than optimal conditions?

I'm thinking of getting a heat pump hybrid water heater (this one maybe); The operating conditions will be technically within the prescribed range but less than optimal. I'm wondering how I should ...
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1answer
32 views

Energy saving box on an old whirlpool hot water heater

There is an energy saving box on an old whirlpool hot water heater in an old house we purchased. I changed both elements out yesterday and it worked fine. Had hot water in about 2 hours. Now tonight ...
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23 views

Fixing a leak in water heater pipe joint

I had a new water heater put in and discovered a slow drip at the joint where the hot water pipe from the heater connects to the house piping. The installer claimed that he didn't touch that solder ...
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1answer
45 views

Can a water softener be installed after a thermal expansion tank? [duplicate]

Our thermal expansion tank is installed after the meter and feeds into the house and hot water heater. It seems like it should have been installed immediately prior to the water heater... Can I ...
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47 views

What copper tube adaptor is this?

This is from a tankless water heater with about 1/4" copper tube. Is the adaptor standard (encircled in blue)? What type is it?
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1answer
105 views

Heating above ground pool by re-circuplating pool water through tankless, on-demand water heater

Due to covid-19 all indoor pools in my area are closed for the foreseeable future. Kids being swimmers, I purchased an Intex 15' round above ground pool and installed in it in the garage. It worked ...
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1answer
28 views

Hot water heater and gas-stove not working at the same time

So I have a gas water heater and a gas stove. I was able to cook on my stove this morning at around 8 a.m. and then I took a shower and it was not hot. I tried to light the pilot on the water heater, ...
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37 views

Is it safe to use timer to shut off gas boiler overnight?

We have an aquaPLUS 280-7 r3 Valliant gas boiler. It heats the water nice and all, but it has an annoying habit of turning on overnight to preheat the water in the storage container. The problem is, ...
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17 views

Lukewarm water from solar cyclinder heating system

I have a dimplex solar heating system with a water cylinder. Been fine for 5 years but in recent weeks even with hot weather I'm getting 15 seconds of hot water in the kitchen and then lukewarm water ...
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28 views

Gas water heater not heating water

A friend of mine is having problems with his gas water heater. He sent me the info below so he did try and determine the cause. It troubles me that he had it "go out" several times a year. ...
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2answers
54 views

What are the downsides to a DIY heat exchanger on my shower drain?

I have a shower stall built into a bathroom. It will not accept a tub in its current incarnation, so this applies to showering only. Outside of the hassle around fabrication, what are the downsides ...
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19 views

Purpose of pressure control valve in multipoint water heater

Most instant tankless multipoint water heater has plastic pressure valve where you can control the water pressure either in the inlet or outlet (by turning the scew below). If you make the flow weaker,...
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1answer
24 views

Multipoint water heater using real 1/2" pipe

A multipoint water healer is connected using flexible hose. This has 1/2" in the connector only but very tiny inner hose (less than 1/4"). What would happen if you use real 1/2" or even ...
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3answers
74 views

Resource comparing power consumption of different water heaters?

I am looking for a website the compares the "real-world" energy consumption of different electric tankless water heaters under different conditions. Any ideas?
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1answer
69 views

How to keep my tankless water heater safe in a cold room?

I have a room in my apartment that can sometimes get around 40°F (4°C), and that's where my new tankless water heater is installed. Should I take any special precautions to keep my pipes from freezing ...
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1answer
37 views

How to reinsulate a water heater ignition wire?

My water heater ignition wire's insulation melted off below the insulating base of the electrode, so now the spark gaps across to a nearby metal bracket instead of gapping across the electrode. I need ...
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1answer
26 views

Can the water supply pass through a water heater before the expansion tank?

I can't find anything on the piping placement of an expansion tank relative to the water heater. All the pictures I find shows the intake from the wall to the expansion tank and then to the WH. The ...
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41 views

Does my water heater require a drain pan and can I connect one to a condensate drain?

Two part question... The code says Where a storage tank-type water heater or a hot water storage tank is installed in a location where water leakage from the tank will cause damage... There's two ...
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74 views

How do you wire a 250 volt plug when you need 240 volt power for a hot water heater

I have a 50 breaker/ plug in a temporary RV power source. The hot water heater I have needs 240 volt. How do I connect the wires on the 50 amp plug so that it runs the 240 volt needed for the hot ...
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2answers
39 views

Modifying electric water heater for easy temperature control

I have an electric water heater. It has a top and bottom thermostat. In the summer I turn these down and in the winter turn them up. It's a real hassle because I have to unscrew the plates and then ...
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1answer
59 views

Minimal temperature setting for hot water heater to prevent legionella

I own a small apartment which I rent out to tenants. The apartment has an electric hot water heater with 80 liters. I now realized that my tenant reduced the temperature setting to only 32 degrees ...
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2answers
50 views

Can I install a subpanel for an electric water heater next to the main panel?

I am replacing my A.O. Smith electric water heater with a Stiebel Eltron tankless water heater. This water heater needs 3 inputs of 40amp 125v. My existing A.O. Smith water heater is next to a gas ...
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32 views

How to calculate whether it's worth turning on a fan to bring warmer air to a heat pump hot water heater?

I have 4 new Rheem 50 gal heat pump hot water heaters being installed in the basement of my home/multiunit property that is a 4-unit building (one heater per apartment). Generally speaking, the attic ...
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0answers
98 views

Voltage drop to water heater

A couple months ago, I replaced my water heater. For the sake of full discolsure, I replaced an AO Smith 40 gal lowboy with a Bradford-White 50 gal lowboy, but the electrical requirements were still ...
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2answers
56 views

Water heater straps too short. Replace straps? Get extension?

The water heater is already installed in a narrow cabinet. So there is no easy access behind it without taking it out: I could get 3 additional inches by making the fold around both brackets a little ...
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0answers
60 views

Can tankless water heaters be mounted to the underside of joists in a crawlspace?

My single-story 1100 sqft home (1 bathroom + laundry + kitchen) currently has a gas 40gal tank water heater. We're looking to renovate and remove the tank water heater. It would be replaced with ...
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3answers
64 views

How much energy/electricity does a Tankless OR tank-based water heater consume?

Incoming cold water temperature: 11 Celsius (constant for the example). Indoor temperature: 20 Celsius (constant for the example). Let us have two choices: Tank-based water heater solution: has to ...
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1answer
37 views

High Water Pressure After Rebuilding the Regulator

My house is in the hills; the water coming in from the city is 170psi. I have a Wilkins 600XL regulator that was installed about 10 years ago. Over the last year or so we have been getting high-...
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2answers
79 views

Will the cold water from a faucet be warm if a re-circulation bridge valve is used?

We are building a new house. The master bath is the furthest spot from the tankless water heater. The builder is specifying the WaterQuick Premiere circulation pump with the bridge valve. It looks ...
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0answers
17 views

Oil clogged up my Honeywell Water Heater Gas Valve WV8840A1051

The gas company cleared oil from my natural gas lines to my house about 1.5 - 2 yrs ago. The gas meter was completely full of oil and was replaced. The water heater was also replaced. Things were ...
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4answers
66 views

Electric heat pump water heater with solar power vs. gas water heater

I am getting ready to replace my current hot water heater - it is a ~15 year old tank gas water heater so I want to be prepared in case it breaks. In the summer (when I am not using gas to heat the ...
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48 views

Does 62 PSI water pressure with spikes of 82 PSI necessitate a water pressure valve (for a new hybrid hot water tank)?

After two days of observation of our water pressure (using a test gauge), the normal water pressure is typically between 61 and 63 PSI, with 62 being the most common reading. Peak-pressure readings ...
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3answers
161 views

Is It Okay to Connect Two Water Heaters in a Series (so that water from one flows into the other)?

Our project is to install a 50-gallon hybrid water heater. Our existing 38-gallon electric water heater is too small and we do not know how old it is. It cannot fill our very large bathtub. The ...
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4answers
2k views

Any special precautions when turning off water to a property?

When turning off incoming pressurized fresh water to a property for a few hours during non-freezing conditions, are there any special precautions that need to be taken? Specifically, is there anything ...
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1answer
76 views

Should I turn off my electric water heater when the water is off?

Our municipality turned off our water today and I was curious if I should turn off my water heater. A similar question was asked (Should a gas water heater be shut down if the water main has to be ...
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1answer
72 views

Why are both elements on in my new water heater?

Recently installed a new water heater. Both elements are on at the same time. Checked with the manufacturer to make sure this is not normal(it's not). Any idea what could cause this? Thanks!
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3answers
73 views

Why is my Water Heater Leaking only when I open the Pressure valve?

I woke up today to a full drip pan under the gas water heater and my utility room slowly flooding with water. Of course the drip pan was never connected to a drain and overflowing. After shutting ...
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1answer
41 views

Hybrid Water Heater with Gas Backup?

I've recently become aware of the existence of 'hybrid water heaters' which use a heat pump to heat the water in the tank. The thing that is appealing to me about this is that the water heater also ...
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2answers
67 views

Single pole or dual pole relay for switching a 3KW water heater? (UK)

I have bought a Wifi controlled device to control a 3KW, 240V water heater (immersion heater) wirelessly but despite being advertised as 15A, it actually has a 13A relay which has "push fit" contacts. ...
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3answers
2k views

Turn off hot water without hot water valve

I have a leaky pipe on the hot water side that I'd like to fix. Following the pipes back to the water heater, I don't think there's a shutoff valve installed anywhere in the line, not even at the ...
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2answers
60 views

warm water only when we replaced the hot water heater with a tankless heater

We replaced the hot water heater with a tankless version. We now only get warm water from the faucets and showers even though the temperature is set at 140 0F on the heater and the outlet pipe from ...
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0answers
15 views

High efficiency water heater to z-vent

We are planning to hire someone to install a forced air high efficiency gas water heater (AO Smith) in new construction. It seems that a z-vent (double walled metal vent, not sure if I'm using the ...
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2answers
49 views

Which is water shut off valve here?

I need to shut valve to fix bathrooms
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2answers
120 views

Why does anode rod need to have metal thread contact?

I'm both frustrated and confused. No one had mentioned to me, even the owners manual that says about replacing the anode rod, and zero instructions come with the new anode rod, said there needs to be ...
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1answer
52 views

Anode rod debris on bottom of tank

I replaced the anode rod on my water heater, when I looked down after draining, I could see pieces of the old rod lying in the bottom of the tank. The old rod clearly had bits broken off from the core ...
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2answers
72 views

Feedback for cheap, compact electric heating faucets

As an alternative to traditional tankless heaters, aliexpress sells a variety of cheap taps incorporating a heater, for example: 220V 3000W Instant Electric Faucet Tap Hot Water Heater This looks ...
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3answers
40 views

Can I swap parts from a new to old shutoff valve instead of soldering a new sweat valve?

The shutoff valve on my water heater has an extremely slow leak. A couple years ago I disassembled it by removing the handle and changing out either the packing or the rubber washer, or maybe both (...
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1answer
50 views

Can I have a shared exhaust flue for a high efficiency furnace and tankless water heater?

I recently purchased and am installing a 96% efficiency two-stage gas furnace. The old unit was an 80% efficiency unit using a 4" metal flue. This flue merges the exhaust of both the hot water heater ...

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