How can my plumber install a powerful 3.5 bar twin shower pump under my bath when all my bathroom pipework is in 15mm copper pipes? I won't be doing the work but I still want to be informed and understand the issues.
I've checked my CW cistern and HW cylinder. All my pipework from is in 15mm diameter copper piping which extends all the way to the terminal fittings ( i.e. shower / taps ) in my bathroom. This is a problem because the powerful shower pumps I have in mind ( e.g. over 1.5 bar ) all expect pipework to be in 22mm.
My original workaround plan was to use 15mm/22mm compression reducers, just before the pump, in order to change the pipework up to the required diameter. However, I have rung a pump manufacturers customer services for technical guidance and this practice is not allowed, or at least it is strongly frowned upon.
So my options are:
a) keep all pipework in 15mm and settle for a weaker 1.0 bar twin pump
b) buy a powerful 3.0 bar twin pump but replace all 15mm pipework between CWS, HWC and pump with 22mm pipework.
c) keep all pipework in 15mm, buy a powerful pump, and install compression reducers "back to front" to increase the pipework diameter from 15mm up to 22mm just before the pump.
Any guidance welcome.
I've checked my CW cistern and HW cylinder. All my pipework from is in 15mm diameter copper piping which extends all the way to the terminal fittings ( i.e. shower / taps ) in my bathroom. This is a problem because the powerful shower pumps I have in mind ( e.g. over 1.5 bar ) all expect pipework to be in 22mm.
My original workaround plan was to use 15mm/22mm compression reducers, just before the pump, in order to change the pipework up to the required diameter. However, I have rung a pump manufacturers customer services for technical guidance and this practice is not allowed, or at least it is strongly frowned upon.
So my options are:
a) keep all pipework in 15mm and settle for a weaker 1.0 bar twin pump
b) buy a powerful 3.0 bar twin pump but replace all 15mm pipework between CWS, HWC and pump with 22mm pipework.
c) keep all pipework in 15mm, buy a powerful pump, and install compression reducers "back to front" to increase the pipework diameter from 15mm up to 22mm just before the pump.
Any guidance welcome.