Wilkins Repair and Maintenance Manual here

Repair and Maintenance Sheets and exploded views of their assemblies. Most individual parts are available although I heard rumor that as of January 2018 they will not sell individual parts any longer.

Exploded views also have the repair kits listed with them.

To purchase parts go here.

Double Check Assemblies

Freeze Protection Information for 950, 950XL, 975, 975XL

Obsolete Double Check Assemblies:
550 3/4" - 6" (Rubbers only, except what suppliers have on the shelf). 950 (3/4" - 2"), 950 (2 1/2" - 10") Parts are available for the 950's in both size groups.
Parts available for obsolete double checks

Reduced Pressure Assemblies

975XL / 975XL2 1/4" - 1/2" Exploded View Maintenance Instructions
975XL / 975XL2 3/4" - 2" Exploded View Maintenance Instructions
975 2 1/2" - 10" Exploded View Maintenance Instructions
375 /375XL 1/2" - 1" Exploded View Maintenance Instructions
375 / 375XL 1 1/4" - 2" Exploded View Maintenance Instructions
375 / 375A 2 1/2" - 10" Exploded View Maintenance Instructions 2 1/2" - 6" , 8" -10"
375AST 2 1/2" - 10" Exploded View Maintenance Instructions 2 1/2" - 6", 8" - 10"
475 / 475V 2 1/2" - 10" Exploded View 2 1/2" - 3", 4" - 10" Maintenance Instructions 2 1/2" -6" , 4" - 6", 8" - 10"
475ST Maintenance Instructions 4" - 6", 8" - 10"

Obsolete Reduced Pressure Assemblies:
575 3/4" - 6" (Rubbers only, except what suppliers have on the shelf). 975 (3/4" - 2") 975 (2 1/2" - 10")

Freeze Protection Information
950,950XL, 975, 975XL 1/2" - 2"

Pressure Vacuum Breaker / Spill Resistant Vacuum Breaker

720A 1/2" - 1", 1 1/4" - 2" Exploded View Maintenance Instructions 1/2" - 2"
420 / 420XL 1/2" - 1" Exploded View Maintenance Instructions 1/2" - 1"
460 / 460XL 3/8" - 1" Exploded view Maintenance Instructions

Pressure Vacuum Breaker Video
Winterizing Pressure Vacuum Breaker Video

Discontinued
420, 460 (Parts available)