Questions about systems that produce and distribute heated water.

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2answers
55 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 ...
4
votes
1answer
125 views

Hot water temp in shower/tub fluctuates

I live in a condo that has 13 units in two buildings and am the president of the board. A few months ago we had a new water pump installed in our boiler room. Shortly after that all three units in my ...
4
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1answer
117 views

Very low hot water pressure entire house

Setup: Electric 53 Gallon Heater, installed in 2014 by previous owners. Location: Tampa bay, Florida, Home built in 1961, typical cinder block house. WE purchase the home in December and all has ...
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1answer
31 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 ...
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1answer
44 views

Temperature of water in the shower fluctuates - will a cheap thermostatic tap help?

I recently moved to an apartment where temperature of water in the shower fluctuates and we called for a plumber. He either cleaned up or replaced one part (I think it was the mixer - nothing visually ...
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1answer
58 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 ...
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0answers
48 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
55 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 ...
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0answers
22 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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0answers
33 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 ...
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0answers
39 views

Risk of leakage when changing open-vented to sealed-system boiler

Apologies in advance for the long post. I currently have a gravity-fed, fully-vented central-heating (CH) and hot-water (HW) system (large cold-water tank and expansion tank in the loft, hot-water ...
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0answers
23 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
217 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 ...
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0answers
13 views

Hot water not circulating

had to replace a copper line and turned off main water to house, opened all drains so plumber could replace pipe, but when main turned back on there's no hot water and pressure is weak. Cleaned out ...
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0answers
29 views

Hot water temperature fluctuating

I have an 8 year old A.O. Smith gas hot water heater that might be having some issues. What we're seeing is that the hot water temperature in our house has been fluctuating a lot lately. Sometimes ...
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0answers
14 views

Replaced hot water tap, Water now runs cold

Had my mono kitchen tap (mono) replaced and now no hot water is running. We have running water its just running cold. All taps are running water, I also have central heating working correctly. My ...
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0answers
24 views

Heating Not working but heating water kicks it in

My heating (gravity fed) is not coming in when the timer starts but the if the water needs heating it kick starts it. I thought it may be a thermostat issue because when I moved this to a point that ...
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0answers
35 views

sudden increase in water pressure but decrease in temperature

Our water pressure used to be just ok, but temperature (hot water) is good. Couple nights ago when I turned on the shower, suddenly I heard a 'bang' sound. But the water pressure has increased so I ...
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0answers
25 views

What is the correct position of the thermostat on a hot water tank in an oil-fired heating system?

We have an oil boiler which heats our radiators and hot water tank. No matter what way I set my heating, I can't generate enough hot water for a bath. I suspect that the thermostat on my hot water ...
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0answers
38 views

Do I need to replace the thermal expansion tank when replacing a water heater?

I'm considering replacing my water heater. My existing heater has an expansion tank attached to the top; should I look into replacing that at the same time or is the life expectancy on those longer?
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0answers
38 views

Low hot water pressure from cylinder

I have a flat with a cold water tank in the loft space, which feeds into an indirect (coil) heated cylinder in my airing cupboard. Hot water pressure has never been great, but acceptable. A couple of ...
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0answers
43 views

Why would a shower pump turn on when not required?

In my long loft I have two shower pumps and two hot water cylinders. The pump/tank on the far end of the loft is for 1 bathroom and the pump/tank on the near end is for another bathroom. After ...