15mm to 22mm with pump.

[kevplumb]

whats that funny smell

no not cow ****

whats that strange noise

is that broken glass i hear

 

[Softus]

Yeah fair point.

 

[tomatokinglover]

ok - yep its all new to me so was planning on monitoring water level in cistern for the first 'shower'.. the pump i am looking at has dry run protection anyway so the worst i should suffer is reverting back to my dribble... softus do you think the mix of 15mm pipe work will be okay?

 

[Softus]

softus do you think the mix of 15mm pipe work will be okay?

I have my doubts. I presume you've read ChrisR's post?

If you can run 22mm from the cistern to the pump then I recommend that you do that - I don't have any Salamander MIs here but I'd expect that this is also what they recommend.

 

[tomatokinglover]

ok softus - great - thanks for advice (and chrisR) - cistern to pump is 10ft straight in 15mm will rip out tomorrow and stick in 22mm its no big deal i don't think (even for worlds worst plumber - moi) will leave from pump to bath/shower as 15mm and fingers crossed... thanks e-body.

 

[ChrisR]

Watch where you take the hot from too - if it sucks air down the vent you'll be in trouble.
Saw an ESP which was the second to fail in 3 months. Mfr came and condemned the installation. I couldn't see why it should make the pump leak so phoned them. Asked if xyz would be ok and the guy said no, could damage pump and make it leak. QED. It leaks from both ends too.

3 bar might give you more than 20 l/min, by the way.
If you have decent mains and swap the inlet valve on the CW cistern for say a Fluidmaster (or even 2 in parallel), it won't be far behind the shower flow.