There are three common methods for domestic water pipe sizing in the UK - BS EN 806.3:2006, BS 8558:2015, and the CIPHE Design Guide.

To determine how water is distributed in a ring main pipe network, an iterative calculation needs to be performed - the 'Hardy Cross' method

1 - Sizing It is important to size a pressure reduction valve (PRV) to suit the flow rate that passes through it. You should not...

We have spoke to numerous designers, contractors, and manufacturers to find out what the common design errors are.

A mistake that is commonly made is connecting fixtures that are used for personal hygiene downstream of a RPZ because it is in the same room

Pressure loss is caused by friction between the gas and the pipe walls. The bigger the pipe, the less pressure loss.

"It appears that sizing a ring main accurately is a black art within the industry that has no endorsed engineering process or calculations"

"Number 6 is often overlooked, undoing all prior calculations and leaving you with a non-compliant system, prone to failure and liability"