Size of pipes for plumbing Aqualisa shower All aspects of plumbing questions and answers, help, tips and information

[Accountantbytrade]

Hi All,

Thank goodness its Friday!

FIrst time posting but long time user and great tips and help by everyone.

I have started to redo our family bathroom and am going to put in an aqualisa smart shower above our bath. I am looking to chase the pipes into the wall but I had a question on the size of pipes needed. Our bath has 22mm fat pipes which was what I was going to chase up the wall to the loft and the new aqualisa shower/bath filler. Does anyone know if they need to be 15mm pipes or can I use 22mm (I would prefer to use 15mm if possible). If I go from 22mmm to 15mm will it reduce the flow rate I have in the bath? Ultimately I am trying to work out how deep to chase the pipes in as I have not got a lot of room.

Thanks for your help.
David

[stoneyboy]

Hi accountantbytrade
If you are on mains fed hot and cold 15mm will be OK if you are on gravity fed then you will probably need 22mm.
Regards S

[Accountantbytrade]

Thanks for the response. We are mains fed and the pressure is good so will stick with 15mm.

Cheers,