Is 10mm microbore really suitable for a power shower?

[AdamW]

I am about to undertake a complete bathroom refit and so have been scoping out what I have to work with. There is a power shower in my bathroom that was installed by the previous occupants and I am planning to rip it out and install a shower pump in the loft above.

Now, I noticed that the plumbing had been done by virtue of 10mm bore flexible pipe. Feels quite substantial, but I was thinking, surely that is making the pump work harder than it needs to. Should I pull it all out and replace it with copper or wider flexible pipe? I will be using either a 1.5 bar or 2 bar pump, probably around 18-20 litres/min.

 

[AdamW]

By the way, I am not really expecting to use 18 litres/ min as that would drain my cylinder in about 4 minutes! But that is what the card for a similar pump read down at the local wholesalers.

 

[breezer]

adam, to add to your origonal post you can press the

button

 

[oilman]

I think 10mm is small. It will only make the pump work at higher pressure which surprisingly, is less work for it than working into lower pressure and shifting more water.

 

[AdamW]

adam, to add to your origonal post you can press the

button

Well, I thought it was such an important point that it deserved an extra mention