Loft tank overflow.

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Loft tank overflow.#8236

By Peter limbert - July 22nd, 2020, 4:03 pm

- July 22nd, 2020, 4:03 pm #8236

Hi, hopefully some can help me with this frustrating problem.
My Cold water loft tank is overflowing intermittently and only stops when I draw hot water from taps, showers etc.
How is the back flow of water into the tank happening. Some things I have done so far..
New ball valve fitted and working.
Brand new hot water cylinder fitted by a plumber.
Help !!!
Peter

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Re: Loft tank overflow.#8237

By SimonG - July 22nd, 2020, 8:50 pm

- July 22nd, 2020, 8:50 pm #8237

Do you have any mixer taps or a mixer shower with no double check valves? And the cold from mains supply?

"Fly me to the moon,
Let me play among the stars"

"It's cold outside, there's no kind of atmosphere"

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Others?

Re: Loft tank overflow.#8238

By REDSAW - July 22nd, 2020, 10:00 pm

- July 22nd, 2020, 10:00 pm #8238

oh no, not the 'you need a new cylinder' jobbie!

Working my cohuners off in the back room!
boiler making vibrating noise like kettle|boiler making whistling noise boiler making humming noise boiler making load rumbling noise boiler making gurgling noise.