TRUMA
Park Lane, Dove Valley Park
Foston, Derbyshire, DE65 5BG
Truma Service/Technical 01283 586020
Lines open 8.30am - 5.00pm Mon - Thur, 8.30am - 1.30pm Fri
Dear Sir
The non return valve would be located somewhere on the cold feed to the boiler, the water sounds as if it is backfeeding into the aquaroll and the non return valve will need replacing.
Kind Regards
Nicki Price
Truma Service