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View the thread, titled "shower pump" which is posted in Showers and Wetrooms Advice on UK Plumbers Forums.

CXR100

Plumbers Arms member
Plumber
Gas Engineer
customer called me , wants me to go over to fit a new bathroom, he wants a shower pump fitted, the hot water cylinder is in the room next to the bathroom so at about same level as shower valve would be, and I take it that the header tank is in the attic,, do I need a positive head or negative head pump? any recommendations on pressures or manufactures? ill go down the route of an Essex flange. also does the pump need to be a certain height etc? thanks
 
negative head, 1.6 if 1 shower, higher if customer wants high pressure or big shower! I always use surrey flange as dont need to drill cylinder!! I hate Essex flanges!! Salamander or monson for me!! Mira for ceiling fed!! positive head must be at base, negative can be anywhere I believe!!
 
you need tanks to be above shower head by roughly 300 mm to use a positive pump any less then go for negative most pumps will say to be fitted on floor in airing cupboard and require a dedicated cold feed from the tank, provided the is air for cooling if the bath backs on to the airing cupboard it can go under the bath
 
Essex flanges are best but a pain to fit, so go with that if you are comfortable.

If the cold water tank is in the loft then you should be okay with a positive head pump cited at the base of the hot water cylinder.
 

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