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Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

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should i wrap exhaust duct joints of hot water heater?

i replaced my hot water heater. I used a single flexible 3" metal duct tube to go from the new unit to a an old "y" connector metal duct that is near the ceiling in the utity closet. I noticed ...
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1answer
63 views

Activating hot water recirculation pump in garage via extension cord under kitchen sink

I have a hot water recirculation pump installed near the water heater that is located in the garage which provides instant hot water via dedicated 1/2" copper pipes. Although I have a timer that ...
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1answer
48 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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0answers
39 views

Isolating water supply to replace basin tap with no local stop valve

I got a new tap for a pedestal basin. Looking at the existing fittings there is no local valve to shut off the water at the basin itself where the water pipes come out of the wall & connect to the ...
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1answer
255 views

How can I drain the hot water line in my house? (re: adding a spigot)

I'd like to add a hot water spigot to the outside of my house but my hot water heater doesn't have a shutoff for the output (ie. hot water side of plumbing). However, the cold water has a shutoff (...
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2answers
103 views

Replace electric water heater with gas tankless (electrical connection)

I want to replace my electric water heater with a gas tankless water heater. My current water heater like most electric hot water heaters takes 220 and the tankless gas water heater uses 120. The room ...
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0answers
59 views

Sink water won't get hot unless shower is on

The sink tap takes 20+ minutes to even get lukewarm, never hot. I have lived with this for a while until I made an interesting discovery the other day. When the shower (in the same bathroom) was ...
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2answers
183 views

Shower in another room leaks when bath is running

I have a free-standing bath in my bedroom and a separate shower stall in an adjacent room. When we run hot water in the bath the shower head starts running-- not just a drip... more like moderate ...
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1answer
59 views

what allows some cold water to enter house and some to enter water heater?

Informational question: To supply hot and cold water to a house you: 1. split at the supply for hot and cold lines. Using a tee - you run one line to the house, and the other to the water heater. My ...
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1answer
1k views

energizing both elements of electric hot water heater

I'm considering using an electric hot water heater (EHWH) with upper and lower heating elements as an electric diversion load. This EHWH would be for pre-heating the water bound for the standard HWH....
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1answer
59 views

Changing hot water supply and keeping cold water supply

Repiping my master bathroom shower and sink. We have a new instant hot water heater on an addition to our house 10' away. The shower and sink now run off the water heater in garage, 100' away. I tee'...
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2answers
123 views

Why my new hot water heater performs worse than my old one?

I know a lot of posts have been made on this topic, but, I have tried everything. I wanted to move my hot water tank from the first floor of my house to the crawl space. My old unit was performing ...
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1answer
114 views

Where to place an aquastat that is external to the hot water tank?

If you need to retrofit an aquastat to a heating system what is the best way to do so? i.e., in some hot water tanks or even boilers there may be a purpose-made port specifically to accept a "well" ...
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1answer
48 views

Copper reducer before hot water heater

My house copper lines are 3/4 in and my new water heater accepts 1/2 copper in a compression connection. Is there any issue with adding a 3/4 to 1/2 reducer before and after the heater?
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1answer
49 views

Why isn't my electric hot water tank producing hot water?

We just bought a trailer and had the water turned on. We have cold water coming out of hot water side in kitchen and bathroom. What could this be? Also we have good water pressure in the bathroom but ...
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2answers
762 views

What could cause my hot water to run out quickly… but only in the bath/shower?

My (London, UK) apartment building's hot water comes from a district heating system and is delivered to my apartment via a "Heat Interface Unit" within the property, owned and maintained by the energy ...
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0answers
171 views

Cloudy hot water from bathroom sink

I have 2 bathroom sinks on the 2nd floor (not in the same room). One of them produces a cloudy (almost milky) white hot water. The other was runs clear hot water. Could this be an issue? This appears ...
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1answer
69 views

Why my hot water goes out in less than 2 mins? [duplicate]

All the water outlets in my condo can only supply hot water for at most 2 mins and then I am left with cold water. I changed my gas water heater 2 days ago, but the problem continues. I was desperate ...
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2answers
2k views

Shower is too cold, despite cartridge setting

I have a single handle shower in my basement that is too cold in the winter. I only need a small adjustment, but I don't know if it's even possible. The "hot water stop" appears to be already set to ...
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0answers
57 views

No hot water from the hot side of the faucet for entire home

I am having hot water issue with my home. I can feel the hot water outflow pipe from the hot water heater being hot. But when I turn on the hot tap, the water turns from enventually cold. In ...
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1answer
1k views

Why does my water heater's drain line rejoin the outlet pipe?

I know very little about water heaters and plumbing. Done some minimal work, but never water heater hookup. I need to replace my 20 year old AO Smith 50 gal gas water heater in a house I've owned ...
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3answers
928 views

Hot water everywhere but the shower [closed]

Downstairs sink gets scalding hot. Bathroom sink (which is 2 ft from shower) gets scalding hot. Shower gets medium hot at best. Any non-plumber fixes here?
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1answer
109 views

Incoming water lines: Just a like to know what this is

I have a strange water line arrangement coming into the house and I would like to know what line is for what - I understand that I have cold 3/4 pipe coming in to the house and cold 3/4 pipe going to ...
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0answers
400 views

Cloudy hot water out of 1 sink in the whole house

There is one sink in our house that when you turn on hot water the water comes out very cloudy. It is in a upstairs bathroom and it is part of a double sink, the other works fine. Picture of the ...
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3answers
1k views

Installing a dedicated hot water recirc line and pump

I'm going to re-plumb my house. It's a 3 bed, 2 bath house. All the plumbing is on the main level, and the basement is partially finished. I'm renovating down in the basement and decided while I was ...
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1answer
51 views

Why does the hot water tank need to be drained of water in order to replace the gas valve?

I'm changing the gas valve in my hot water heater. Exactly as shown in this video. The video is queued at the point where they drain the water from the hot water tank. My question is... why? Note: ...
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1answer
7k views

Why did a failing water heater emit an electrical burning odor?

Our electric water heater seems to have burned out, but the breaker didn't flip off. My husband smelled an acrid burning smell in the house and traced it to the water heater, which is in the bathroom. ...
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2answers
89 views

Trouble gluing cap on hot water faucet

We have a kitchen sink hot water faucet that has a cap with "Hot" on it to go on the faucet. We've tried several types of glue for it, but after a few days of usage, the heat the faucet absorbs from ...
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0answers
35 views

Bled Hot Water Heat but pressure increased again

I have a oil (converted to natural gas) hot water boiler running three zones of baseboard heat. Lately I have been hearing water rushing through one of my zones (I don't hear it on the other zones). ...
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3answers
1k views

No hot water (at all) on upper floors

A few days ago, the bathrooms on the 2nd and 3rd floor of my townhouse stopped getting any hot water. Nothing comes out of the faucets when they are turned all the way to the hot side. The cold water ...
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1answer
991 views

How often to replace thermostatic mixing valve

To start off, I absolutely hate idea behind thermostatic mixing valve, but that's not a question. The water in my house runs hot for about 10 minutes and then turns icy cold, and I have to turn it ...
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1answer
327 views

Water radiator system has single loop instead of flow & return pipes — does this make sense?

I have a hot water heating system connected to several radiators throughout the house. While all diagrams I have seen of radiator plumbing have a separate flow and return pipe, this one has a single ...
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0answers
115 views

Black stuff comes out of faucet after running hot water for 10 minutes

After running my bath tub’s hot water for about ten minutes, the faucet is ejecting 1-2 second streams of black particulates, every few minutes. This is happening consistently after running the water ...
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0answers
121 views

What is the purpose of a Pressurised hot water cylinder

Does a pressurised hot water cylinder have to deal with just higher pressure mains cold water or does it also have to cope with the heating element being heated by a sealed high pressure central ...
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1answer
40 views

What diameter should pipes from boiler to heating the hot water cylinder be

What diameter should pipes from boiler to heating the hot water cylinder be - the same as the pipes used for radiators or larger ?
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2answers
478 views

My cold water tank, has one inch of brown sludge at the bottom, what should I do

For the first time ever I have looked properly at my cold water tank. It has one inch of brown sludge at the bottom, what should I do. I assume this is the tank that provides the water hot/cold to ...
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1answer
268 views

Would pipe from radiator to bottom of hot water tank be supply or return?

I have one radiator that does not work at all (although it has worked in the past). Unlike all the other radiators that come directly of the main supply and return pipe from the boiler I can see that ...
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0answers
39 views

With post-build instant hot water systems should the homeowner be extra diligent about water heater maintenance?

Instant hot water systems that are installed after a house is built use the cold water pipes to return hot water back to the water heater, or discharge that water through normal cold water use. (I ...
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1answer
1k 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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0answers
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
590 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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0answers
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
207 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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0answers
347 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
350 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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0answers
95 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
122 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
342 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
241 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 ...