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Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

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23 views

Is my CH/HW fully pumped? Is it two-pipe?

I'm having problems understanding the exact configuration of the CH/HW piping in my house. In particular, I have to understand where and how to place piping for additional radiators at the upper floor....
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41 views

Tankless Hot Water Recirculation

I recently had a Rheem Tankless Water Heater installed. The rtgh-95dvln-2. They installed the pump kit meant for the water heater, the ap17920. However, I do not have a dedicated recirculation line, ...
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37 views

Tankless hot water system only providing luke-warm water?

I have tankless hot water which has been working well up until this week. A week ago we discovered a leak on the hose from the propane tank, so we replaced the hose, but since then it hasn't seemed ...
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1answer
35 views

Hot water cylinder (direct heating), loosing heat and pressure during the day

I moved into a new property a few months ago with a direct heating hot water cylinder. This is a new one for me as I have always had a gas combi boiler before. I have economy 7, so the water heats ...
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1answer
41 views

How can I figure out if a Combi Boiler will be adequate for my house?

We recently moved into our new home that currently has a Super Hot MG-100 Hydronic Boiler (installed in 1986, when the house was built). Clearly, it's done its job and in need of a replacement. We had ...
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3answers
61 views

Can I run a gas hot water heater on propane?

I have property where I am boon-docking an airstream. I've been looking into a passive solar hot water heater design, For the holding tank I was looking at using an old hot water heater, I found a ...
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2answers
29 views

Thermostatic mixing valve that holds water temperature at 120°F / 50°C

I've recently installed solar hot water and as expected it gets extremely hot. I would like to keep the tank as hot as possible (>180°F) and simply mix down the water to 120°F / 50°C as it's used so ...
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1answer
57 views

Chlorinate hot water heater

I left town for a week and now have a hot water heater that's been sitting and apparently breeding bacteria resulting in an abundance of hydrogen sulfide. It stinks really bad. I tried emptying it ...
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1answer
43 views

A water heater pressure relief valve/pipe is guided to release hot water outside of the pan (see picture). Is this installation correct?

A plumber installed the hot water pressure relief pipe to point outside the water heater pan, as shown in this picture (on the right). What could be the reason to do so? Is this recommended/proper ...
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1answer
45 views

Intermittent cold water from the hot faucet

Why would cold water run from the hot water faucet (for about a minute), after the hot water was already flowing? This happened in two washrooms, at different sides of the house, but not at any other ...
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3answers
67 views

Can you use aluminum foil around gap at floor of hot water tank then seal?

Fairly big gap at floor around pipes of hot water tank. For mice prevention I read some where you could fill gap with aluminum foil then seal. Is this correct. If so what kind of sealant should be ...
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1answer
25 views

Hot Water Water Hammer When Cutting Off Cold Supply

The house is 3 years old. This just started to happen. When you cut off any cold water supply the inlet line to the water heater knocks or water hammers. The first attempt I cut the water off at the ...
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2answers
73 views

Flushed water heater yesterday got a lot of sputtering right after that and today hot water is not flowing with the same pressure as before

Yesterday I decided to flush my water heater and I did the following: turn to pilot turn off cold water supply to water heater open valve and drain hot water. I noticed it was still flushing for a ...
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1answer
65 views

Water heater busted

Water heater busted this morning, after a couple of hours the water was turned off at the main in the yard. Now how can I cap off the hot water heater in order to still have water in the house, I can'...
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29 views

Using existing hot water vent for extraction

I have a room in the basement with equipment (computers) that gets really hot. There is an ac vent but the thermostat is nowhere near the room. Also in an alcove is the hot water heater behind a ...
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2answers
29 views

Why does a system boiler with hot water cylinder not use a diverter valve?

I understand that it doesn't need a diverter valve... But I was thinking, couldn't the system be more efficient with one? For example, the central heating could run at a low temperature (35°-40°) and ...
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1answer
47 views

cheap hot water tank failure after 3 1/2 years - expected, luck, installation problem, acid water, pressure cycle?

This "6 year" hot water heater failed after 3.5 years - is it bad luck (eg normal for the $429 box store 40 gal DHW heaters and how they make money off what I expect is a pro-rated warranty?), poor ...
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1answer
45 views

No hot water after teeing to outside spigot

I recently saw an outside cold and hot water spigot on This Old House. After checking out prices, I decided I'd make my own redneck warm water spigot by bringing a hot water line close to the outlet ...
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21 views

How to hookup an InSinkErator hot water dispenser to a Waterstone Hot/Cold Faucet

I'm trying to figure out what to do with the 3rd connector on my InSinkErator H-CONTOUR-SS. I have a WaterStone hot/cold filtration faucet model 1400HC-SS that doesn't have a connection for that 3rd ...
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1answer
39 views

How to prevent galvanic corrosion on water tank inlet

My current hot water tank, presumably installed by a DIY former homeowner, has severe corrosion on the inlet tube and must be replaced due to a considerable leak. Were I to DIY, how could I prevent ...
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3answers
120 views

Water heater working when flushing a toilet

I have a tankless water heater. After I finish to use hot water and I close the faucet, the water heater starts a fan and make a typical noise, it's very typical and expected. I guess it blows off ...
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2answers
90 views

Can I replace a 40A water heater breaker with a 60A breaker to prevent trips?

Double 40 amp breaker tripped as HD want work. Can I use a double 60 amp on my water heater?
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1answer
52 views

Gas hot water tank leaking - water turned off, what about gas? Repair or replace?

My water heating tank has sprung a leak - out of the top (fortunately?) Whoever installed this thing didn't do a proper job of preventing galvanic corrosion, so the tank input is corroded (irreparably,...
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3answers
126 views

Dedicated Hot Water Recirculating System Woes

Two plumbers and no remedies to why my hot water turns cold (but not as cold as the cold water rather slightly warmer). This problem began to happen gradually and it occurs at every hot water faucet/...
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1answer
72 views

Keston C36 Combi boiler - Error E37

According to the boiler manual E37 Water pressure error - You must top up the water pressure for your system When opening the fill loop valve to add water pressure, water flows out the exhaust ...
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2answers
33 views

After replacing a recirculating pump (and pressure regulator), shower won't run hot

We've just had a our pressure regulator replaced, and a new recirculating pump installed. All 3 showers used to get hot water reasonably quickly (15-20 seconds). Now the shower furthest from the ...
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3answers
125 views

How do I get 150F water to the dishwasher?

I have read in a maintenance manual that the ideal temperature for incoming water to a dishwasher is 150F. In my house, the hot water heater is currently set to 135F and it cools on traveling around ...
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0answers
38 views

Corrosion due to dissimilar metals or bad ground?

I'm a 1st time home owner but experienced DIYer here. Unfortunately I have little plumbing experience. I installed a hot water recirc. pump at my hot water heater about a month ago. I did not notice ...
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1answer
43 views

Can lost water pressure cause a water heater to leak/rupture?

I woke up this morning at 5 am to my water heater making loud noises. It had leaked all over the floor and the bathroom sink had a steady stream of hot water that wouldn't turn off. This water heater ...
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1answer
34 views

How to measure electricity used by hot water heater

I am debating the effort to save on electricity costs with my electric water heater. Solar water panel heater, hybrid water heater, etc. Before I go down that path, I want to track the cost of the ...
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0answers
35 views

What size anode do I need for this tank

I have an old pressurized hot water cylinder and I am trying to change the sacrificial anode however the local plumbing stores seem to only have anodes for models they currently sell and also I'm ...
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2answers
50 views

Can I reduce hot water distribution delay with thinner tubes?

Kitchen and bathroom(s) are at the opposite sides of my house (14m). I recently replaced and moved my hot-water-heater (electric, now thermo-dynamic) closer to the bathroom(s) in order to reduce the ...
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2answers
204 views

Cold water leaking into the hot lines?

Recently the water heater (installed upstairs) had a leak so I disconnected it and removed it. There is a ball valve shut off on the cold line into the tank - I closed it to be able to open the main ...
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2answers
37 views

Why does the t&p valve on gas water heater open when the tank is filled?

Put a new t&p valve on my water heater and as soon as it fills up the valve opens why would this happen?
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42 views

How can I diagnose galvanic corrosion on a water pipe?

I have a newly installed indirect hot water heater and two of the pipes are showing significant amounts of corrosion. Given that the installation is only 3 months old, I suspect that there may be ...
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0answers
283 views

Why do I have low hot water pressure in showers only?

I have 2 showers in my house. Suddenly the hot water pressure dropped in both. The cold is fine and we haven't noticed any change in the faucets in the house. What could make my hot water pressure ...
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2answers
35 views

How does hot water get circulated into an indirect fired hot water heater?

For an indirect heated hot water tank, the hot water comes from a boiler. Why are there two output ports on my tank? I have appended below a diagram of an HTP/Superstor tank to use as a reference: ...
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3answers
48 views

Which is cheaper? Tankless or Storage water heater?

We are planning to build a family house, 2 adult, 2 child, 100m2, eastern EU. We got stuck that what kind of water heating should we use. Where we use hot water?: shower kitchen sink in bathroom ...
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0answers
26 views

Do I need the “flow control” component on my furnace

Context: My furnace supplies tank-less domestic hot water to my small house. The cold water pipe going into the furnace has a "flow control" component that limits the flow to 3gpm. I understand that ...
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2answers
42 views

No electric current going into Water Heater

We bought a brand new water heater back in November. Came home last night to no hot water. Check circuit breaker and it wasn't tripped. Turned it off an on anyway. Nothing. Hit reset button on ...
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1answer
55 views

Shower hot water not getting hot enough

I left my house unattended for a number of months. Before leaving, I turned off the water to the house and drained the lines. This was during the winter. Anyway, now that I am home, I notice my ...
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3answers
84 views

How does water flow through my water heater and up to the top floor without a pump?

My house has a gas based water heater(geyser) on the outside. The plumber has connected it such that without the use of electric pump, just through pressure alone, hot water reaches the 1st and 2nd ...
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1answer
1k views

Why does shutting off cold water valve to the water heater shut down cold water in entire house?

I'm a new homeowner so maybe my understanding is off. My question is, why would turning off the cold water intake valve on the top of the heater turn off cold water to the entire house after about 12 ...
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1answer
35 views

Why don't I have hot water after shutting off the water supply for a while?

I have a 240 watt State Select 40 gallon water heater. I shut off the water supply for maybe 6 hours to replace faucet seats in the shower. I turned off wrong breaker, and 2 days later no hot water ...
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1answer
75 views

How to switch off/on a Hot Water System

I believe I have what is called a gas-boosted, solar HWS (although there is only one solar panel on the roof). On the outside of my system, apart for the valves/pipes/wires leading into and out of it, ...
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28 views

Lukewarm water in bathroom

I recently moved to a new flat. The hotwater is supplied by a electric heater located in the kitchen which is directly next to bathroom. In the bathroom, the tap for the shower doesn’t get hot to run ...
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1answer
37 views

Iron in Hot Water Heater

My water has a lot of iron in it so I have a water softener to take care of that. The problem is I forgot to check it and it ran out of salt. The majority of my house is fine (I have to better clean ...
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44 views

Hot water heater intake is very close to an outside faucet: how terrible is this?

My new house has an outdoor spigot which is supplied by the same copper pipe as my hot water heater. (There's no cut-off valve for the outdoor faucet individually!) Going backwards, the pipe from the ...
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21 views

Hot water comes through cold after turning off and on

I have a combi boiler providing hot water in my house. If I run the hot water (e.g. in my shower or kitchen sink) it comes through hot just fine after a couple of seconds and stays hot however long ...
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2answers
153 views

Hot water recirculation pump suggestion in home with return hot water line [closed]

We had a hot water re-circulation pump by water heater before and had it removed last December when we detected leaks around it. This is our setup: We have a return hot water line coming back to the ...