Mike asked ... Bosch WTA74200GB Vented Dryer?    |    Stuart G asked ... C3 Front Wiper control problem?    |    Clare S asked ... Repair Electriq dehumidifier?    |    Bob asked ... Charger fault?    |    Terry nelson asked ... How to remove the flexible shaft from a curved shaft ryobi t?    |    Click here to ask your question

boilers?

water passing through expansion pipe on unvented mains fed system
m. s.Burton, May 2009
This means that the pressure release valve (PRV) is either faulty and leaking, or that your boiler is continuously pressurising due to the filling loop being left open.

John, May 2009