Question about a gravity fed boosted shower

[Darrenm843]

Hi, I'm installing a Stuart turner shower mate 2.6 bar twin impeller , it has 15mm flexi connectors, the shower unit has 3/4 inlets to the hot and cold , I'm using a Surrey flange and the pump will be on the floor beside the cylinder and the shower will be on the next floor , positive head. I was planning on taking 22mm from The cylinder and cwst to the pump and and then 15mm from the pump to the shower unit and just puttin on 2 3/4 x 15mm male bends to reduce it at the shower, just wondering would this be ok or should I go 22mm the whole way and just reduce it in and out of the pump or take it 15mm the whole way instead, it's a sunflower shower head aswell, bit of a read ino, thanks in advance

 

[plumbingservices]

All this is in the installation manual for the pump you are fitting.Memory serves, I came out of pump in 22mm then reduced to 15 about half metre before mixer valve with no probs,but if you don`t stick exactly to manufacturers guidelines they won`t honour the warranty even if it`s nothing to do with your pipework.They will do their best to blame your install to get out of repairing it anyway so keep to their instructions.

 

[longdogs]

All this is in the installation manual for the pump you are fitting.Memory serves, I came out of pump in 22mm then reduced to 15 about half metre before mixer valve with no probs,but if you don`t stick exactly to manufacturers guidelines they won`t honour the warranty even if it`s nothing to do with your pipework.They will do their best to blame your install to get out of repairing it anyway so keep to their instructions.

Exactly as above. I have fitted pumps completely in 15mm because the manual said I could and it worked without any problems. But it is best to stick to their recommendations.