Roca Thesis basin mixer - slow flow rate

[minty88]

Hi,

I have just had a Roca Thesis basin mixer installed and I'm not convinced that the flow rate is what it should be.

It's not a trickle but given my hot water system is unvented main pressure, I would have expected much better.

Does the flow rate decrease dramatically with the use of Flexi tails as supplied or is there another issue?

Many thanks in advance.

Ron

 

[PlumbBobBob]

flexi tails do decrease flow because of the reduced inner bore compared to copper tails.