In message , BigWallop
writes

"therebel" wrote in message
...
what is the recognised way of testing mains water pressure. I am looking at
having an electric shower fitted and the pressure is affecting my choice.


A web search for the word "Manometer" will show you what's needed.

So you have the choice - water and a very tall tower, a significant
quantity of mercury and a small tower or something in between


--
geoff