Installation:
No special tools are required for maintenance, just tighten by hand, and the parts can be assembled freely. (In the unlikely event that you are unable to tighten the 765 3/4-inch repair kit into the vacuum breaker, apply the included grease to the threads. The two dimples on the outer ring of the bonnet section are suitable for use with large wrench.)

Design:
The two dimples on the outer ring of the bonnet assembly are fittings for a large wrench; if necessary, tighten using an appropriate tool and apply the grease provided to the bonnet assembly and the threads of the bronze valve.

Material:
Bonnet and poppet valve: ABS plastic.
Rubber O-rings: For professional-grade reliability and durability.
Heavy duty steel and brass stem and spring.

Fitment:
PVB Model 765 CBV & DBV 1/2" - 3/4" Backflow Preventer and Vacuum Breaker Repair Kit.

Package Included:
1 *Bonnet
1 * O-Ring
1 * Spring
1 * E-Ring
1 * Washer
1 * Stem
1 * Rubber Disc
1 * Poppet