Backflow Service Call/Warranty Watts 909QT 34632 BFP-8 / 1st floor laundry above counter: Service/Warranty Call - Leaking backflow. Customer would like to stop leak or shut off water to backflow temporarily if it does not affect water supply. Watts 909QT 34632 BFP-8 / 1st floor laundry above counter: Return trip for full rebuild.