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Plumbing

Hot water cylinder not filling up?

Anonymous user 09/03/2024 - 3.27 PM

Hi All We had no water mains for 6 days and ran the hot system dry Now the water has come back there’s potentially a massive airlock that I’m trying to shift We have a hot water cylinder on the first floor with an inlet at the bottom for the cold feed, an outlet 2/3 of the way up for the hot water taps and an outlet at the top for the power shower I have blocked a bath mixer tap with a coin and gaffer tape and opened both taps. It filled the cylinder perfectly However, when I run the power shower, it works for a minute then spits and dries up. If I have the bath mixer taps open (with the coin and gaffer) it continues to run ok. I’ve checked the header(?) tank in the loft and it is full and all valves open. I hoped that the power shower would eventually spit out the air but it seems that the cylinder isn’t refilling. Any ideas? (I’m a diyer) I’m thinking I need to verify that the header feed is working - perhaps it’s got blocked somehow - are there any easy tricks? Many thanks

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4 Answers

Anonymous user

Sounds like a blockage in the pipe that feeds the hot water cylinder It is possible that Debris of some kind was floating in the storage tank, and has been sucked into the pipe work when the water level in the tank dropped. You could try. Blocking the expansion pipe in the loft the pipe that hangs over the tank. The repeat the operation with mixer tap to force water up the cold down feed. Alternative get a wet and dry vacuum cleaner and use it to try and clear the feed pipe Also check that the pipe are clear where they are connected to the storage tank .

Answered26 February 2022

Barry Constable

Rating: 5 out of 5

Thornton Heath

There is a bad air lock in the pipes, so you will need to get either a plumber or heating engineer to back fill these pipes to force out the air lock is the quicker solution or sometimes waiting some hours it can eventually clear.

Answered27 February 2022

CHR Bathrooms & Tiling

Rating: 5 out of 5

Wisbech

Assuming the mixer tap you are using to push cold is mains water fed

Answered27 February 2022

MB plumber

Rating: 5 out of 5

Birmingham

go to the kitchen tap if u got a mixer then put ur hand over the spout where water comes out and block it with ur hand open tap inbetween the hot and cold blocking any water coming out move the handle to hot. That will push any air up the pipe hope that helps

Answered3 March 2022