~ SM01.125 Vacuum Breaker Adapter~ Turns an Arrowhead Anti-Siphon Hose Bib Into a Straight Through Connection. Fits Bottom of PK1390 Stamped 1019-A-BFP Valve(1, SM01.125)

The product it self is a 5-star rating, however the price is a bit unreasonable, thus the 4-star. I had searched high and low for this adapter. We have Arrowhead/Champion frost free hydrants (bibs) on our home that came equipped with “permanent” almost non-serviceable anti-backflow devices attached via a uncommon thread. The anti-backflow devices actually negated the drain feature of the valve causing them to hold water in the dry barrel portion. The devices leaked and would create a huge mess. Thanks to these adapters the headaches are gone, the water drains and the bib does not leak. Installation was a little involved. Arrowhead used red thread locker to secure the anti-back flow device and the simplest means is to heat it with a torch. I would recommend heat a little then test with channel locks or a pipe wrench. Too much heat could ruin the packing on the valve stem or un-sweating the bib is very possible (the bibs are sweated together at the factory). After removing the offending device, cleaning off the old thread locker with a metal brush is a good idea. When installing the adapter I used the old rubber washer (seemed better quality) and applied blue thread locker to keep the item in place when removing hoses. The make more clearance, I removed the faucet handle as well for better access. Great product that solves a bureaucratic dilemma.