Hello, thanks for commenting and asking the question. We would recommend 25mm. This carries enough flow to feed 2 showers in a property. The flow rate through a 25mm MDPE supply will normally be close to 30 litres per minute. This of course depends on internal plumbing, but into the property its likely to be around the 30 mark. 32mm is normally overkill and will not be worth the extra cost involved for a normal dwelling even with 2 bathrooms, etc. Hope that helps. Cascade Water Services.

Thanks for replying