hot supplyed pumped, cold on the mains?

[cj123]

the only way(because of the pipe work) i can run a pump to the shower is using a single impeller on the hot and run the cold off the mains to a thermostatic shower?any one see any problems with that?

 

[seco services]

yes you'll need to bring your mains pressure down to the same as your pumped hot.
use a prv

 

[cj123]

wheres the best place to put the prv? is there differnt prv for diffenrt pressures?or can you change the setting?the pump is 1.5 bar and the mains is around 2 bar depending on time of day?

 

[seco services]

http://www.rwc.co.uk/public/gplumb/pequal.pdf