This repair covers the Pressure Vacuum Breaker Replacement. It is the yellow see through cap inside the backflow preventer. Failure normally happens if the backflow preventer is not properly closed off and bled for winterization. If a new valve is required due to a crack, we can replace it too. Each backflow preventer is a little bit different, so our team will need to verify model prior to installation. After a hard freeze, inventories can shrink for these types of items, which may cause delays.