Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

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3answers
282 views

Recommended hot-water pipe diameter to minimize time to hot-water at the tap

For a new build, I'll be running pipe from the hot-water tank to the two bathrooms, which are about 40' away on the other side of the house. One aim is to avoid the situation where it's necessary to ...
0
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1answer
93 views

It takes a long time before I get hot water upstairs. could this be due to hard water?

I live in a three-story townhouse and I have a Navien tankless water heater installed in my first floor garage. When I turn on hot water on the first floor, I’m able to get hot water pretty quickly, ...
1
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1answer
41 views

what is the name/designation for two-conductor insulated shielded copper wire for 24V that runs to the aquastat?

I would like to order some wire online but don't know what it's called. Two-conductor shielded copper wire for 24V, insulated so it could be secured with zip-ties to the HX supply and return pipes ...
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0answers
32 views

What is causing my tap (faucet) to not work properly?

Background My flat is on the 3rd floor of a converted Victorian building and the mains water pipe to my flat has a booster pump installed on the ground floor to improve water pressure. Whenever any ...
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0answers
31 views

What is the name for the adapter to take indirect hot water heater drain valve male thread to garden hose

The male threads on our indirect hot water heater tank's drain valve are 30mm actual outer diameter. What is that drain thread's nominal designation? I need to get an adapter for it to attach a ...
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0answers
12 views

Why is there no flow-check valve in this diagram of indirect hot water heater

In the attached installation diagrams for an indirect hot water heater there is no flow-check-valve on the return in the top diagram with zone valves but there is such a check valve on the bottom ...
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1answer
34 views

Valves on an electric hot water heater

I'm getting ready to replace my GE electric hot water heater. On top there are hot AND cold water valves. When draining the heater, I know to shut the cold water valve. What about the hot water valve? ...
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0answers
19 views

Instant hot water heater failing

I have one of these: https://www.tlc-direct.co.uk/Technical/DataSheets/Redring/RRRP1E_Installation_Guide.pdf It started to trigger the thermal cut-out every now and then. I opened up the device, ...
2
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0answers
53 views

Hot water pipe falling off

Any suggestions on how to fix this hot water tank pipe (tightly setup) falling off - am planning to call in a plumber
1
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1answer
65 views

Turning off hot water at tank: input or output or both?

I have a tap dripping hot water and need to turn off the supply of hot water. The house has a gas water heater in the basement. There is a valve on the water supply leading into the tank and another ...
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0answers
25 views

Loud groaning when turning on hot water

I recently installed a new faucet in one of my bathrooms, but now I'm having trouble with the hot water part of the faucet. If I turn it on too quickly, the faucet makes a loud groaning noise and no ...
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1answer
82 views

My hot water won't turn on unless the central heating is on as well, why?

I've looked at a few related questions, and I can't see a similar question being posed. Our hot water taps only work (i.e. produce hot water) if the central heating has been on, which we tend not to ...
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2answers
33 views

Gas Tankless hot water heater shuts off when mixing

I have a tankless gas hot water heater that powers a shower. There is minimal distance between the heater and the shower. When taking showers and trying to mix the hot and cold water to get a ...
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0answers
35 views

Does a diverter valve based on temperature exist?

I want to install a solar water heater in my house in the future, so I've been thinking about how I could do it, something like this: Cold water enters the solar heater, hot water comes out. If it's ...
0
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1answer
47 views

What is the purpose of pipe connecting in and out hot pipes to water cylinder

What is the purpose of the circled pipe, which connects the pipes that go to and from the boiler to the hot water cylinder in my vented domestic system? The diagrams I have seen of other systems do ...
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0answers
110 views

what is this electrical component in my thermocouple?

I have a 14 year old has water heater which i believe needs a new thermocouple. I can relight the pilot but it will not stay lit. I've bought a new thermocouple, and I'm prepared to replace the old ...
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1answer
48 views

One bathroom faucet, cold water only, unless I run multiple faucets?

I have a 5 year old home in NC. In the master bath, I have a his-hers dual sink with two handled Delta faucets. One faucet is broken and can only provide cold water from both sides. If I run hot ...
0
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1answer
136 views

16 showers , 6 toilets, 8 sinks and 6 urinals what size of water pipe should be for the supply?

I have building with 16 showers , 6 toilets, 8 sinks and 6 urinals what size of water pipe should be for the supply?
0
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1answer
158 views

Rinnai tankless on-demand water heater making a high-pitched whistling sound

I have a Rinnai tankless on-demand water heater. The unit is making a high-pitched whistling noise. I have: -Unplugged the unit from the electrical wall socket. -Turned the gas valve to the off ...
0
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2answers
110 views

Can I switch the hot and cold water supply to improve the pressure of hot?

I have a very old house (built in 1903) with very old and corroded pipes. Because of the corrosion, the hot water pressure is fairly low (mostly in the shower) but cold water pressure is okay. I’m ...
0
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1answer
207 views

Unable to turn knob on Rheem hot water heater to pilot

I have a Rheem heater (Model# PROG50-38N RH60). The pilot has gone out. This tutorial suggests I must turn the knob to pilot to start the process of relighting the heater. When I try to turn my knob ...
1
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1answer
173 views

Do I need a floor drain for the water heater in my townhome?

I’m looking at replacing an 11-year-old water heater as the hot water has become extremely discolored recently. I have flushed it twice in five years (I know, not enough) and could never remove the ...
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4answers
102 views

Very interesting issue - Hot water not coming out

Two days ago, my plumber had capped existing hot and cold waters lines in one of the shower and tub area as part of the remodel process. Since then I did not get hot water anywhere in the house. I ...
1
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3answers
221 views

Why is this apartment water heater so much more expensive than my bigger home one?

A friend living alone in a 2 bedroom condo needs a new water heater and has been quoted over $4000 from multiple plumbers to replace the one pictured. I live in a 6 bedroom house with 7 people, I ...
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2answers
70 views

No hot water upstairs after turning off main water to install new sink

Turned off the main water to install a new sink, after we turned it back on there is no hot water in one shower upstairs and very little hot water in one of the other showers. Checked the hot water ...
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0answers
19 views

Hot water faucets turn cold after15 minutes shower, some hot water faucets are still hot, we just replaced our hot water heater and furnace

Getting cold water in multiple hot water faucets after someone takes a shower or hot water is run from a facut. This issues was not happening prior to installing a new Oil furnace and oil fired hot ...
0
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1answer
82 views

After a water main line repair on our street, our hot water stream for the bathtub suddenly is very weak. Could the pipe be clogged by debris?

Situation as described in the question. We first suspected a partial freeze (temperatures have been extremely and unusually low here in Austin), but even after hours of running the steaming hot ...
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1answer
80 views

Extreme cold: Pipes seem ok, except hot water for bathtub which only trickles, despite being closest to water heater. Can it be frozen? Burst?

Situation as described in the question. We have a peer & beam foundation. I already went under the house to check for a possible leak. The bathtub pipes are impossible to get close to, but from ...
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3answers
32 views

Washing machine hot water hookup valve repair

Recently I found my washing machine hot water hookup drips slightly when the washer is not attached. I believe it is a bad valve. When the washer is attached, water flows to the drain and doesn’t ...
0
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2answers
101 views

How to heat a bathtub when the water heater isn't doing enough?

I have a big tub and a small water heater. I live in an apartment so there's not much I can do about that right now. I've looked into immersion heaters and from what I can tell they aren't meant for ...
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3answers
95 views

Hot water tank only has warm water after bath

We have a new 60 Gallon (US) gas hot water tank. After running a bath, water coming out of it is warm instead of hot. Is this normal? Precisely, here is the experiment I performed: Temperature ...
0
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1answer
39 views

Second Pressure releif valve in hot water system?

My water heater has a pressure releif valve attached to the top, with a downspout that drains on to the floor. There is a second release valve on the hot water distribution pipes, this one drains to ...
2
votes
2answers
72 views

Replacing 2 hot water heaters with 1

I've recently purchased a home that has two hot water heaters - one at each end of the house. One in the garage, one in a closet. They're both showing their age, and both cost quite a bit to operate. ...
0
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3answers
475 views

Will an in line water regulator fix my tankless water heater trade off between pressure and hot water?

I had a contractor install a Rheem electric tankless water heater in my casita. I initially wanted a much larger one but he talked me into the Rheem 13 KW 2.54 GPM. When the unit was installed the ...
1
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0answers
8 views

Heating Issue — hot water baseboards

and thank you. I have a gas hot water boiler, two story house, hot water baseboards on top and first floor, boiler in the basement, separate circulating pump and loop for each floor. The boiler kicks ...
2
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1answer
67 views

How can I heat river water for skating rink construction without access to power?

I'm working on designign an ice flooding rig, and getting power to it is a big challenge. This is remote (middle of a river) so I'm looking to carry enough fuel to flood for a few hours straight, and ...
5
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4answers
1k views

Replacing toilet shut-off valve and need to turn off water; Need to turn gas water heater to pilot?

I'm replacing a toilet shut-off valve (clean water flowing into tank) on the first floor of my (100-year old) home. I'm reading that I need to shut off the water, then drain the lines, before making ...
2
votes
2answers
45 views

A newer gas hot water heater keeps getting colder. Where is the first place to look?

We had a new hot water heater installed 1-2 years ago. It worked great up until about 2 weeks ago, where we all noticed that it no longer was heating to the same temperature. I can continue to crank ...
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2answers
108 views

How do I bleed a very old radiator and identify whether my system is steam or hot water?

All radiators are heating except one, so I'm trying to bleed it. There doesn't seem to be an obvious bleed valve (unless it's that nondescript, frozen, simple bolt on the top front corner of the left ...
0
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1answer
128 views

Will reducing the size of a pipe running to my bathroom reduce pressure at the fixtures in the bathroom?

I bought an older house and there are 1 inch pipes running from my hot water heater, across the basement then up to the bathroom on the second floor. The pipe also goes a round-about way and there is ...
0
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1answer
67 views

Sink Hot Water Spigot Controls Shower Temperature

I have a contractor here to redo my guest bath, which is in-between my main water line/hot water heater (tank) and my master bath. The master bath is on the farthest side of the house away from the ...
0
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1answer
23 views

Water turns cold after water heater circulation pump is off

I have Rheem water heater and newly installed circulation pump. I am facing a weird situation with the circulation pump which is that the circulation pump is set to run between(4PM-9PM). When I take ...
1
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1answer
89 views

How do I move a hot-water convector?

I have a "breakfast nook" section of my kitchen with a large hot water convector installed along the baseboards of two walls. Because of other elements in the heating system located close ...
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0answers
21 views

Hot water only when multiple sources turned on

When one hot water source is turned on, the hot water is only lukewarm. But as soon as another source is simultaneously running, the water runs hot. For example, the kitchen sink runs cold, but if I ...
0
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1answer
93 views

Pipe insulation, pros and cons

Someone told me that pipe insulation is not necessary, rather he said it could cause more problems. I'm under impression that he's making an excuse because he forgot to put it back. Any inputs, anyone?...
3
votes
1answer
111 views

Sediment/flakes in hot water

For the past year or two, I’ve been seeing a lot of these hard brittle flakes coming out of all the faucets in my house (kitchen sink, bathroom sinks, and shower/tub). Now that I actually have the ...
1
vote
1answer
65 views

Shower Runs out of hot water after a few minutes but sinks stay hot at the same time

I've just moved into a new house and my shower runs out of hot water after a few minutes. It's heated by a 10 year old Bosch tankless natural gas unit which I believe claims 105k output BTU which ...
0
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2answers
34 views

Comapatibility with dedicated hot water recirculation plumbing

Can this Watts Premier hot water recirculating pump (0955800) be connected to a dedicated plumbing (already intalled in the house) that recirculates water back directly to the tank and does not go ...
1
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1answer
104 views

Why does my Vaillant boiler shut itself off every day?

I'm subtenant and I have Vaillant boiler (don't know which model). Every time I use shower after few minutes boiler shuts itself down and the burner lockout indicator is flashing. I'm then without hot ...
0
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1answer
37 views

Kitchen faucet only gets lukewarm, never gets hot

Recently my kitchen faucet will only become warm but never hot. Both water valves are completely opened. Every other faucet in the home get hot and work properly. Any ideas?

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