22mm hot, 15mm cold--is this usual? All aspects of plumbing questions and answers, help, tips and information

[wing-on]

My bathroom has a 22mm hot water supply from the combi running to the bath and shower, and a 15mm cold water supply. Is this usual? Shouldn't both be 22mm?

[simon_the_gas_man]

This is normal, before combi's were in use we got our hot water from a cylinder. The hot to the bath was always in 22mm to help with the flow from the cylinder. If for some reason you wanted to change it to 15mm it won't be a problem.

[thedoctor]

MANY OF THE ANSWERS TO YOUR POSTS CAN BE FOUND, WITH DIAGRAMS, IN THE DIYDOCTOR PROJECTS SECTION. CLICK HERE www.diydoctor.org.uk/projects.htm