I turn the main water supply of the other day,and when I turned it back on and operated my shower the pressure had gone and there was water coming from the back of the shower unit, I take there is a release valve some where in the unit can you help me rectify my problem.

Martyn Hillier, November 2012

Hello, it sound like the PRD pressure relief device has failed, you need to replace it, try www.showerspares.com they are the experts

gary, December 2012