John Aston wrote:

"The Natural Philosopher" wrote in message
...
snip

I think I am at about 3 bar hgere and water simply gushes out.
My main restriction is internal pipework and the water softener.



Just out of interest, is your water softener a high flow type? Does it feed
a vented or unvented hot water system?


High flow ish. Its on 22mm copper feeds. System is unvented.

One shower at a time and its totally fabulous. Skin ripped off back etc.
Two showers together is only as good as yer typical large combi.

Pipework is mixture of 22mm and 15mm.