Watts 2 1/2"- 4" 957 2nd Check replacement kit.   Kit includes second check module, check module o-ring and red silicone (RS) disc elastomer. 

Watts 975 air gap for 2 1/2" - 10". Ordering # 0111764

Watts 10" 957 repair kit- first check kit. Kit includes first check module, check module o-ring and red silicone disc elastomer. Ordering # 0899215

Watts 957 8" Repair kit for the first check. Kit includes first check module, check module o-ring, and read silicone disc elastomer. Ordering# 7018135

Watts 2 1/2" - 4" 957 repair kit-first check kit. Kit includes first check module, check module o-ring and red silicone (RS) disc elastomer. 

Watts 4" 957 repair kit- first or second check rubbers. Kit includes check module o-ring, read silicone disc elastomer and e-clip. Ordering # 0889372

Watts 2 1/2" - 4" 957 repair kit- rubber total. Kit includes first and second check module o-rings, two red silicone (RS) disc elastomers, two e-clips, relief valve diaphragms, relief valve inlet coupler o-ring and relief valve piston assembly. Ordering # 0889373

Watts 6" 957 repair kit- rubber total. Kit includes first and second check module o-rings, tow read silicone disc elastomers, two e-clips, relief valve diaphragm, relief valve inlet coupler o-ring and relief valve piston assembly. Ordering # 0889377

Watts 957/957DA 8" repair kit- second check. Kit includes second check module, check module o-ring and red silicone disc elastomer.

Watts 10" 957/957RPDA repair kit- second check kit. Kit includes second check module, check module o-ring and red silicone disc elastomer. Ordering # 0899219

Wats 10" 957/957RPDA repair kit- rubber parts for first or second check rubber parts. Kit includes check module o-ring, red silicone disc elastomer and e-clip. Ordering # 0899223

Watts 8" 957/957RPDA repair kit-check rubber for the first or second check. Kit includes check module o-ring, red silicone disc elastomer and e-clip. Ordering # 0899222

Watts 10" 957/957RPDA repair kit- rubber total kit. Kit includes first and second check module o-rings, two red silicon disc elastomers, two e-clips, relief valve diaphragm, relief valve inlet coupler o-ring, and relief valve piston assembly. Ordering # 0899247

Watts 8" 957/957RPDA repair kit-rubber total. Kit includes first and second check module o-rings, two red silicone disc elastomers, two e-clips, relief valve diaphragms, relief valve inlet coupler o-ring, and relief valve piston assembly. Ordering # 0899246