Mixer show bangs ...

[THECULLINANES]

Hello,
Please could someone give me some advise.
We have a combi boiler but for some reason the previous occupants left the cold water tape in the loft.
We changed the shower to a mixer shower and ever since the shower bangs when being used. The tap are fine but the shower really bangs.
The water will come out and all of a sudden it starts to spurt and bang, eventually it will stop, the water will shoot out cold then gradually warm up.
I am wondering if it could be due to the hot being of the mains and the cold of the water tank....
My question is do you think that if we got the tank disconnected and ran the cold of the main also it would stop the banging?
All advise appreciate,
Thanks you
kelly

 

[Howsie]

Welcome to the forum.

Your shower has not been fitted in line with the manufactures instructions so it's not going to work correctly. Get it fitted (or fit it) properly and you should find that it will work as designed.

 

[THECULLINANES]

I thought it had been fitted correctly by a qualified plumber... I found the instructions, it does state it can be used with a balanced combi boiler system but it the cold comes from the tank, am I presuming it is not balanced?
Thank you

 

[Howsie]

Your presumptions are right mate. Get him back to put it right, he's taken the lazy route by pulling in a cold supply from the bathroom.