Watts: 0888521 – SECOND CHECK KIT 3/4″  RK for 009M3 RP & 007 DC (Same as 0888551) (Same as AMES 7016643)

Watts: 0888551 – SECOND CHECK KIT 3/4″ CK2 Repair Kit (RK) for 007M3 DC

Ames: 3/4″ – 2nd Check Module for a 4000BM3 RP

KIT INCLUDES:  check assembly and cover O-ring