Shower problem

[plumb-tech]

Hi guys, wonder if anyone can help.

Went to a job today and this guy has had a wet room installed downstairs(extremely bad job), and he gets no hot water from the shower, ive tested both pressures the cold is mains 3.5 bar and the hot is from the cylinder upstairs 1bar. now i was thinking wheather to pump the hot or reduce the cold? been told shouldn't pump hot water to mixer valve that got cold mains, also cylinder is very small so probably only 1.5 bar pump but dont think this will make a difference. so think im gonna put a pressure reducer valve on the cold.
Any ideas?

 

[justlead1]

Hi. Why not disconnect mains and run a cold supply from cold water storage cistern?

 

[tackleburger]

Hi. Why not disconnect mains and run a cold supply from cold water storage cistern?

If only it was that simple eh? Right answer though.

 

[tamz]

Check the hot and cold are not reversed.

 

[Plumbstar Tom]

a PRV would do it but who told you not to pump hot when cold is mains?

Its a common reason to add a single impellar pump!

Oh and most pumps will fail with an inlet pressure of 1 bar