Cold feed from loft water tank

[stanley321]

The shower in the upstairs bathroom takes its cold from the water tank in the loft. Why is this? Surely this will lower its pressure....Why not T off the mains water coming into the tank.

Is there a reason to doing it this way round?

Cheers

 

[kidgreen61]

The simple answer is that both hot & cold supplies are at equal pressures, and therefore unaffected by someone turning a cold tap on downstairs, causing the the person in the shower to be scalded for example.

 

[crockett]

Stanley, is your shower an electric shower, with one pipe going into the unit, or a power shower, with two ? If it's one pipe, then it should be fed from the mains, teed off like you've said, not loft cistern as has been mentioned. What make / model is the shower?