Shower running hot and cold

[zx5000]

Hi all,

I have a problem with a shower fluctuating between cold and extremley hot. My system is as folows:-

I have a relatively new centrifugal boost pump located in my loft adjacent to my hot water storage tank which it is connected to. The cold water feed to the pump is from both the storage tank cold water header tank and the mains supply.

One of my theories is that the mains supply is "fighting" with the header tank supply and therefore disrupting the cold supply to the pump.

Could anyone either validate this theory or discount it as a potential problem

Thanks very much in advance

Michael

 

[seco services]

The cold water feed to the pump is from both the storage tank cold water header tank and the mains supply.

That don't really make any sense.

 

[bolshy]

+1

 

[45yearsagasman]

Why don't you post a drawing or a pic of the setup? Saves a lot of theorising.

 

[zx5000]

Why don't you post a drawing or a pic of the setup? Saves a lot of theorising.

Should have done this in the first place really. Will take a picture today and post it. Michael