“Great quality back-flow preventer valve. Heavy construction, solid design. I was using this Apollo/Conbraco unit to replace a Watts 800M4 series that was leaking after 15 years. A word of caution is to pick up some extra PVC 45 degree elbows and extra tubing. The Apollo/Conbraco units are a little longer in design and won't fit in place of the smaller Watts units. Easy fix is just to use some elbows to mount the new valve. Cheers, J”
