Pipe size for Shower Pump

[DIYNick]

I need to fit a pump for my shower, it is on the same level as my hot water tank but is supplied via 15mm pipe approx 11 metres run (this is all this pipe supplies). Cold water is off the cw tank and approx 8 metres from pump also 15mm pipe. Is this ok, I have read pumps need 22mm pipe supply.
To ask more still - can anyone reccomend a quiet 2 bar pump for this purpose

 

[Bamber gaspipe]

I need to fit a pump for my shower, it is on the same level as my hot water tank but is supplied via 15mm pipe approx 11 metres run (this is all this pipe supplies). Cold water is off the cw tank and approx 8 metres from pump also 15mm pipe. Is this ok, I have read pumps need 22mm pipe supply.
To ask more still - can anyone reccomend a quiet 2 bar pump for this purpose

You need to, or you have fitted it, make your mind up.

 

[DIYNick]

I need to fit one - not fitted or bought yet, hence I ask for advise...!