Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

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2k views

How to chlorinate a tankless water heater?

I live on a private well and have had a tank for a while. Every few months I'd have to chlorinate the tank (with hydrogen peroxide) to get rid of the rotten egg smell. Two local plumbing companies ...
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27 views

How to Diagnose the noise from my Hot Water Tank

I Have a air source heat pump supplying a 250L ecoCyl tank. When it is warming the water, it makes a loud rattling vibrating sound and a series of bangs, getting louder as the tank warms towards 50C. ...
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3answers
625 views

Tankless point of use water heater that only heats when inlet is cold

There are other questions such as this that ask about a point of use heater to provide quicker hot water, but they don't seem to fit what I want. Our kitchen sink takes a while to get hot, and I ...
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1k views

Hot water heater is leaking, how much longer will it last?

This question was asked before but the title question was not specifically answered: "Hot water tank leaking at bottom could it go from a trickle to a gush?" I have a old hot-water heater (tank) that ...
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1answer
208 views

Flushing a water heater

I replaced my water heater 2 years ago, this weekend I plan on flushing it. I have read steps anywhere from turn off the gas and stop the water line, to just open the spigot at the bottom and fill up ...
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396 views

Leaking & constant running water sound in hot water system

My Dux Proflo gas hot water system (with water tank) is leaking water. Water is pooling at the base of the hot water tank. Secondly, there is a constant water flow noise coming from near the top of ...
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2answers
387 views

MakeWater heater gravity feed

I installed a water heater gravity circulation line but it does not circulate. On newer heaters I learned that there may be a flap that prevents siphoning. How do I remove this? Rheem Model # Prog50-...
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98 views

Combi boiler on 2nd or higher floor - how to tell if water flow and pressure is sufficient?

The combination boiler in my house has to be moved, and one idea is to put it in the loft space to free up a decent amount of space in the main part of the house. The house isn't big, so this would be ...
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0answers
132 views

Strange Pin Pierced Pipe in Boiler

Just wondering if anyone had any ideas on this? The other day, I put the central heating on for the first time in about 6 months. The radiators did not get hot and within a few minutes the boiler ...
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1answer
123 views

How do combi boilers with built-in hot water tanks work?

A number of combi boilers on the market in the UK have small (approx. 20 litres) internal hot-water tanks. These boilers are commonly marketed as being suitable for households with high hot-water ...
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1answer
372 views

Purpose of hot water tank and boiler

What is the purpose of the hot water tank and boiler when it comes to a) heating and b) drinking water. When I switch on my boiler (not combi) for both heating and drinking water, I see a flame lit ...
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3answers
263 views

Water heater too hot, possibly caused by low water flow

I have a puzzle: The water heater in a small building was too hot -- scalding. Turning the thermostat down to warm or even vacation didn't seem to make a measurable difference. We were about to ...
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1answer
69 views

Natural gas mini-tank water heaters? [closed]

I have a need for a point-of-use style mini-tank (4-10 gallons) which runs on natural gas. I see a lot of electric mini-tanks of this kind but none that run on NG or even LP. Do they exist? I cannot ...
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2answers
352 views

Replacing 47-gal electric water heater with no pan and elevated drain

I recently moved into a condo unit in Washington, DC (2nd floor of 2 story building) and I'm looking to replace the 47-gal lowboy electric water heater that's from 2003. The problem is that there is ...
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2answers
924 views

Prevent hot and cold water mixing through kitchen faucet

I have a kitchen faucet that allows water to back flow through the pipes. The way that works is that you turn on the main faucet handle to warm water, then turn off the water at the at the faucet ...
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1answer
78 views

Air trapped behind check valve?

I recently installed a thermostatic mixing valve on the hot water feed to my shower pump which has a max water temp. (One of these https://www.commercialwashroomsltd.co.uk/assets/docs/products/...
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5answers
2k views

Why does hot water only run for 30 seconds in bathtub?

In the bathroom of this rental is a tub with a shower diverter. It's an older setup with a hot & cold faucet and a center valve (one direction diverts to shower, the other to the tub faucet). If ...
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1answer
123 views

maxi-pod heat store keeps putting water back into header tank

my maxipod has worked perfectly well since installed in 2014 but now it has started to put hot water into header tank then out the overflow. I turned of water going out from header tank to maxipod ...
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1answer
48 views

Retroffiting buried pipes that carry hot water?

I am considering to improve the efficiency of an existing installation where heat pipes between house and hot water deposit have been insulated with a thin (10mm) neoprene sleeve and directly buried? ...
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1answer
33 views

Instant water heater supply filter

I have an instant tankless water heater, stibel-eltron dhc12, and want to protect the heating element from the high mineral content in my water. A simple strainer may be good enough or a filter. ...
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1answer
2k views

Extra hot water for Jacuzzi

We moved into an all electric (no gas or oil) house with a 40 gallon water tank and a Jacuzzi.. Looks like the Jacuzzi had never really been used. When trying to fill it we can just barely get enough ...
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92 views

Why did the water pressure in my bathtub change but shower is fine?

First, to describe my tub/shower it is a one handle, one spout type setup where you pull up on the knob to direct the water flow to the shower (typical setup). Recently I noticed that when I go to ...
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2answers
165 views

Is 68F too low for hot water heating thermostat? Final radiators not getting heat

I have a hot water heating system. It's a single loop in a ranch home. The ground floor is about 1500 square feet. When the oil furnace turns on, the first few radiators in the loop get warm, but the ...
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2answers
1k views

What options exist for replacing or upgrading heater radiators?

I've got a hot water heating system in my home. Some rooms have baseboard radiators (recent ones), then other rooms have old radiator faces like this: The heat isn't coming up so well in some of ...
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1answer
9k views

Shower problem: Can't turn off hot water

I turned the tap fully clockwise, as usual, to turn of the water. Still, a significant volume of hot water continued to flow. I removed the tap handles and used some locking pliers to twist the ...
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1answer
96 views

what would cause a bathroom sink connector hose to pop off

Around 7 am this morning I woke up to my bathroom sink spewing water from underneath. The hot water feed was disconnected including the water shut off valve and spewing burning hot water into my ...
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1answer
391 views

Nest 3rd generation UK Install Terminals 4, 5 and 6 are used to connect cables that switch your domestic hot water on or off

Nest 3rd generation UK Install Terminals 4, 5 and 6 are used to connect cables that switch your domestic hot water on or off. Hi have my new nest 3rd gen installed heating is working great for ...
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1answer
2k views

Rapid loud tapping in wall adjacent to radiator- when tenant above adjusts

Hello and thank you for your reply. I have a very loud and at times rapid tapping noise in the wall. The apt building is 2 stories high, I am located on the bottom floor (end of the plumbing line). ...
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2answers
338 views

Is it safe to connect dish washers and laundry machines to hot water?

Is it a good practice to connect the dish washer and laundry machine to the hot water line, instead of the cold water line? My house has heated water, so this would save energy and time; I wonder if ...
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2answers
339 views

Can one get instant hot water from home faucets without a heater?

My house has a solar and electric heating mechanism which provides hot water year-round. However, when opening the hot water in the kitchen and toilet faucets, I get cold water which gradually get ...
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53 views

Why is the hot water pipe from this small boiler norprene, not metal? And could it be replaced with a metal pipe?

The diagram (full pdf instructions here) is of a small boiler that fits under a kitchen sink, and keeps a small amount of water constantly near boiling which you can use for cups of tea etc. (its my ...
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1answer
728 views

Tankless water heater - not consistent hot water output

I have a tankless with a descaler on the cold water input. When I turn on the hot water at the faucet it takes a minute or so to get hot water. Then I'll hear some banging/knocking of the pipes. ...
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1answer
123 views

Vent to outside in gas hot water heater closet, can I seal it?

In my laundry room I have a closet with a gas hot water heater and on the wall to the outside in this closet are two vents going outside. This obviously presents a heat leak as you can feel the cold ...
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111 views

Does a thermostatic water valve works when reverse connected?

I installed a regular shower thermostatic water valve to feed a washing machine (the internal heating failed and we want to extend its working life - I also think I should have done this earlier, as ...
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0answers
85 views

How can I adjust the hot water limit on this faucet?

This is the inside of the handle for my bathtub faucet. It's a single handle that goes from cold to hot by turning counter clockwise. The stop collar, red, doesn't appear to adjust like my other ...
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2answers
359 views

Are water heater elements like light bulbs in that they either work or do not work?

A relative indicates that the volume of hot water delivered has declined significantly and is becoming problematic when showering. They claim the water heater thermostat set-point was upped from 120 ...
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1answer
697 views

What is the Virginia code regarding gas water heater connections?

I am renting a home that had to have the gas water heater replaced. The landlord had someone install the new one and the connections are questionable. My plumber informed me that using cpvc with shark ...
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1answer
77 views

Odd smell from hot water if I don't use it for a while, what could it be?

I moved in about 3 years ago. I noticed when I was running hot water I got a terrible fart smell from the water. I ran all faucets on hot in the house to drain the hot water heater and fill it with ...
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1answer
174 views

Boiler system shows different pressures

I recently had to change the expansion tank on our boiler. I decided to add a shut off with drain as well as a pressure gauge to make it easier going forward. I've come across a problem. The ...
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0answers
871 views

Why does my shower only have lukewarm water and the rest of house faucets have hot water?

I have hot water in every other faucet of my house, but the MBR Shower. While for 15 years it has given me hot water,it now only gets lukewarm water (not very good for taking a bath). I've replaced ...
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2answers
1k views

Voltage increase when connecting a large load to household circuit

So in the place I'm currently staying, they use an inline hot water heater1. This is a ~5500W, 50A beast2 that replaces the shower head and heats up the water as it comes out. Notably, even 5500W isn'...
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1answer
225 views

I have Cold water upstairs but NO hot water. However I have hot and cold in my kitchen.

The cold water pressure is great upstairs but I do not have any hot water going up stairs I turn the hot water on it makes a big loud bang but nothing comes out
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1answer
44 views

hot water, baseboard oil boiler - bleeding at boiler site possibility?

I may replace my current oil, baseboard boiler but would prefer bleeding the system at the boiler site (if it's possible) vs at every room separately. Is it possible to bleed air out at the boiler, ...
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1answer
173 views

satellite water heater or recirculating pump?

I want to eliminate the long wait for hot water in my kitchen. I've ruled out a tankless unit there, so it's between a small storage-tank unit (6-12 gallons), or a recirculating pump (between the main ...
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0answers
190 views

Re-pressurize boiler / change expansion tank

I have a question about how to pressurize system when replacing expansion tank. I have successfully taken the old tank off, and am about to go buy a new expansion tank(hopefully already pressurized ...
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1answer
91 views

Summertime hot water in the cold lines

I have an oil fired boiler (baseboard) that also heats my hot water. The hot water has a line from the cold supply to feed the system then it circulates through the boiler and into a tank for storage....
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1answer
151 views

New T&P valves on water heater leaking, pressure driven from 65 to 165psi

a family I know moved into a house that's three levels, garage is at ground level and has two gas water heaters, one for each flat above. Both are 48 gallons. Each has four settings: A B C and Very ...
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2answers
1k views

water heater keeps on turning off

my water heater (gas Rheem MODEL NO.42VP75FW) keeps on shutting off this is the error code it shows it means the maximum amount of ignations attempt have been made and the system has went into ...
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1answer
2k views

Why does the water at my sink not get hot but the shower does (same bathroom)?

I recently moved into a new house and there is one thing that baffles me and that is how the water from the sink in my bathroom will not get hot and it takes a long time for it to even get warm. Just ...
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1answer
1k views

No hot water pressure - perhaps sediment clogging exit pipe from water heater

Here's the situation: Almost no hot water pressure (just a trickle) at all outputs (not just a single sink with an issue) Cold water runs fine and has full pressure Water heater is tank-style and is ...