EMIHO Anti Siphon Valve, Hose Bib Vacuum Breakers Set, 3/4 Inch GHT Hose Backflow Preventer for RV Garden Spigot, Brass Connection Backflow Preventer Connector Includes Tape and Extra Gaske, 4 Pack

Thanks

Works great.

Worked as it should. Good price

Extra washers are provided but be sure to buy your own teflon tape. The teflon tape that they provided is super thin and shreds.

Restrictive enough to drop water pressure probably 8-10 psi

The pkg of 4 was convenient and cost effective. Breaks the vacuum in an energized hose to reduce chance of freezing. Prevents water back flow when hose end is in wet location. Does spray water when relieving pressure.

Not sure what all the extra seals are for but install was easy.