Shower starts when toilet is flushed

[Sussexenergy]

Hi All,
your help please. I have installed a brand new bathroom including
a thermostatic mixer shower.
The only thing out of the ordinary, is a faulty hot tap on the existing
kitchen sink. There is a new oil combi boiler in the property.
When the outside tap is used, the Kitchen tap starts running
and now upstairs, when i flush the new toilet, the new shower starts!?
Can anyone shed any light on this?
Thanks

 

[REDSAW]

are you d.i.y ?

 

[Sussexenergy]

im a qualified plumber

 

[Gray0689]

Sounds very odd indeed
Poltergeist maybe lol

 

[newcastle phill]

Tell them after using the loo to flush the sink !!

 

[Dave Walker]

So does that mean there having a golden shower each night

 

[REDSAW]

sounds like a wind up!!

is the kitchen tap a mixer?

i would sort that out first and see where you are.

 

[Ollieg]

Usually that type of fault is a ceramic cartridge. Not usual on 2 different outlets.

 

[mjt]

Mixer passing across somewhere but on two outlets!?

 

[Sussexenergy]

Speaking to another Plumber today and he suggested it could be an airlock or a deadleg?
As it happens., there is a shower room downstairs which is 1st fixed only!
I will run some water through the ballofixs.
I will check tomorrow because i am scratching my head otherwise!
I will let you know....

 

[thompsonbrown]

Maybe your boiler needed to take a leak.:lol:

 

[REDSAW]

therefore your looking at pressure 'bounce'

 

[tamz]

im a qualified plumber

How much did you pay for that badge? Qualified! What does that mean these days? Anyway back to the taps and shower. You may need someone better qualified than a plumber The Exorcist Blu-ray Trailer - YouTube But then again there is always a rational explanation for those in the tred :wink: