Watts: 0888140 – 1/4″ – 1/2″ COMPLETE RUBBER PARTS KIT for RK 919 RT (Same As Ames 7018505) 

Ames: 1/4″-1/2″ –  Total Rubber Kit for a 400B RP

KIT INCLUDES:  2 check seat O-rings, 2 check cover O-rings, relief valve O-ring, relief valve cover O-ring, relief valve stem O-ring