Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

57 questions with no upvoted or accepted answers
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0answers
131 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 ...
3
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2answers
946 views

Water Supply Noise due to Thermal Expansion?

I have a plumbing issue that I'm looking for suggestions on. After using a substantial amount of hot water (say, a long shower + washing laundry) I will hear a loud rumbling / vibrating sound ...
2
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0answers
37 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 ...
2
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0answers
265 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 ...
2
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0answers
162 views

Possible cross over issue with water lines

About 2 weeks ago our hot water started getting less and less hot, now it is completely cold. If I turn the cold angle stop off at the sink, so only the hot water line can feed the faucet, and turn it ...
2
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0answers
78 views

Could the diverter valve be causing water to get cold quickly?

I recently finished a bathroom renovation. Went to take my first shower in the new surround and hot water only lasted about 15 mins. For the remainder the water was lukewarm. The new shower has a ...
1
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1answer
45 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 ...
1
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2answers
31 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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0answers
33 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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0answers
27 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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0answers
163 views

electric hot water heater high limit switch repeatedly opening

The problem I am in the southeast US and have an electric hot water heater that is 25 years old (as is the house). Two years ago, I diagnosed and successfully replaced the lower thermostat. Earlier ...
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0answers
40 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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0answers
60 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 ...
1
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0answers
120 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 ...
1
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0answers
41 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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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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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 ...
1
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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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0answers
58 views

Why do I get hot water from the cold side of the faucets

I get steaming hot water downstream of any faucet being used. How can this happen?
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3answers
2k views

Flow sensor adjustment for Navien 240S natural gas

We installed a Navien 240S natural gas in our house, and it is working fine. Except the short range for hot water valves in the showers. So, in other words, I need to turn shower valve almost all ...
1
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0answers
624 views

hot water humming maybe Grundfos pump

There has been a humming noise coming from the hot water heater, and it sounds like it's coming from the Grundfos UP 15-18 B5 pump. The humming is constant 24 hours a day and from what I can tell it ...
1
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3answers
952 views

Boiler heating extra zones

Background: This is a new house, with a boiler system I'm not familiar with. Instead of zone valves, each zone has its own pump (4 zones). There is a fifth pump on the other side of the boiler. Not ...
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0answers
65 views

Heating system is heating the radiators instead of the hot water - why?

We have a heating system with a boiler, hot water cylinder and a controller to set the timers for the heating and hot water which it then switches between accordingly. Lately, it intermittently (I ...
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0answers
270 views

Why doesn't the hot water work but the central heating does?

We have a gas fired boiler (which works). There's no problem with the central heating. Both the hot water and central heating valves actuate automatically when they're selected on the heating ...
0
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0answers
14 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 ...
0
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1answer
33 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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0answers
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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0answers
15 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 ...
0
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1answer
37 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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0answers
39 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
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 ...
0
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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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0answers
31 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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0answers
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 ...
0
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0answers
67 views

Cold water handle overpowers hot water

In trying to fix a leak in my shower head, I ended up replacing both the hot and cold stems for Price Pfister handles. First, I replaced the hot water stem, which seemed to reduce the leaking. But, ...
0
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3answers
208 views

How do I bleed a noisy radiant heat system?

I have a gas fueled (converted from oil just a few years ago) boiler in my basement with an integrated tank-less water heating system for the showers/taps/etc. The output is three zones as shown in ...
0
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1answer
71 views

why won't my shower regulate water temperature

a couple days ago this started. no matter what position I turn the handle towards the left it's always very hot. and the same if I turn it to the right. very cold. I'm assuming there must be some sort ...
0
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1answer
41 views

Temperature monitoring for storage hot water system (RP-2 connection)

My HWS has a secondary outlet connection I don't use, and I'd like to use it to install a thermal probe I can monitor. HWS RP ¾ / 20 temp probe? Does anyone know of a practical way to install a ...
0
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0answers
568 views

No hot water in only one bath tub

We are not getting hot water in only one bath tub. The left side is for hot water and right side is for cold. There is no drop in pressure when I turn on only the left side. But instead of hot water ...
0
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2answers
666 views

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 ...
0
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1answer
139 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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0answers
186 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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0answers
60 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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0answers
422 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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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). ...
0
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0answers
124 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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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 ...
0
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0answers
394 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 ...
0
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0answers
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 ...
0
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0answers
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 ...