SeaEagles 765-1inch & 1-1/4inch repair kit Replacement for febco 765-1 repair kit | Febco vacuum breaker repair kit Installation Instructions.
Turn off the water supply, bottom ball valve first,
Relieve water pressure by opening test cocks on side of PVB, Make sure both ball valves on the 765-1 are turned off
Turn the sprinkler controller on manually unscrew the top nut and take off the brass canopy
Take out the old Bonnet & Poppet, (if it's too tight use wrench)
Now to reassemble the new parts
Put the new poppet inside (White Pipe Thread Tape, or Oil Bag Included in the Kit,)
Place large O-Ring (included in kit) around the Bonnet.
Thread Bonnet into PVB unit (hand tight only)
Replace Canopy and tighten nut on top of canopy using a wrench, then Open water supply side ball valve first then second ball valve.