This question is regarding Redring Pressure Relief Valve (PRV) Rubber Washer - 93795817

Shower fault

Water flowing as usual but is also spewing from over flow tube.do you know what could be causing this?
Asked 8 years ago by Christopher
I think the Pressure Relief Device (PRD) may have blown.

It’s a safety device on the bottom of the heating tank.

It is fairly easy to replace however there is usually something that causes it to blow, often a kink in the hose or the showerhead is blocked, so check this before fitting the new PRD.

Answered 8 years ago by Anonymous

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