So I'm about to have my hot and cold water pipes upgraded from 22mm poly to 28mm copper. This is to resolve the flow restriction to multiple shower outlets. There's approx 15m of pipe for each hot and cold leading to the bathrooms which will all be upgraded to 28mm. However, the megaflo inlet and outlet remain at 22mm. My understanding is that this is fine - the increase in pipe size anywhere on the circuit will reduce the overall pressure loss and increase the flow - can someone please confirm this for me?
I also have the option of having my megaflo 22mm PRV replaced to a 28mm, as well as a small section (maybe half a metre) of 25mm MDPE upgraded to 32mm MDPE. My incoming main is 32mm MDPE. It sounds like the effect of these would be negligible if what I assumed above is correct, but again, any pointers, as having it done all at once would be more cost effective. My water softener is 22mm (high flow kit), but is stated to work at 54 l/min, so this would remain straight after my mains anyway.
Thanks!
I also have the option of having my megaflo 22mm PRV replaced to a 28mm, as well as a small section (maybe half a metre) of 25mm MDPE upgraded to 32mm MDPE. My incoming main is 32mm MDPE. It sounds like the effect of these would be negligible if what I assumed above is correct, but again, any pointers, as having it done all at once would be more cost effective. My water softener is 22mm (high flow kit), but is stated to work at 54 l/min, so this would remain straight after my mains anyway.
Thanks!