WILKINS 720 1/2-1" CHECK SPRING

WILKINS 720 1/2-1" CK SPRING #721-33

Zurn

SKU:
721-33
UPC:
612052058085
Availability:
Items in stock ship same day if ordered by 3:30pm PST, Monday-Friday.
Model Series:
720 / 720A 1/2" - 2"
Model Group:
720 / 720A 1/2" - 2"
Model Size:
.5:1/2"
Model Size:
.75:3/4"
Model Size:
1:1"
Spec Sheet:
Manufacturer Spec Sheet
Spec Sheet:
Manufacturer Spec Sheet 2
Packing Slip Description:
WILKINS 720 1/2-1" CK SPRING
PDP Heading:
WILKINS 720 1/2-1" CHECK SPRING
Catalog Product Description:
Check Spring
Breakdown:
Repair Guide
Resources Ref Manual:
Reference Manual
Resources Repair Info:
Repair Info

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WILKINS 720 1/2-1" CHECK SPRING

SPRING,1/2-1" 720A. This is an original manufacturer repair product used within various divisions of Zurn Industries or previously private labled under another manufacturer.

Model Overview

The Model 720 and 720A are pressure vacuum breaker assemblies. Production began approximately 1975 under the SMR name. Around 1978 it was sold to the Neptune Meter Co. In 1984 Wilkins regulator bought the rights to produce this assembly. The assembly is of bronze body construction. The check spring is contained when the bonnet is removed. The check seat is cast in the body and is not replaceable. The A designation in the model number refers to a design change in the air inlet parts. Both models will accept the new "A" design. The air inlet utilizes a rubber fold to exert the pressure for the air inlet loading. There is no spring on the air inlet. Before 1994 the test cocks used were a specially designed needle valve that required turning of the test cock to operate. In 1994 a standard ball valve type test cock was utilized. In 2010 the test cocks were moved from the body to the ball valve.

Model Series:
720 / 720A 1/2" - 2"
Packing Slip Description:
WILKINS 720 1/2-1" CK SPRING
UPC:
612052058085
Brand:
Zurn

Reference Manual

Repair Info

Model Group:
720 / 720A 1/2" - 2"
Model Size:
.5:1/2"
Model Size:
.75:3/4"
Model Size:
1:1"