Pentair Rainbow High Capacity MODELS HC-3315, 3330, 3340 Chlorinator O-ring Kit Pentair Rainbow High Capacity MODELS HC-3315, 3330, 3340 Chlorinator O-ring Kit Includes 2 lids orings, 4 air relief O-rings Quality replacement parts by TORK Distributors r172240, R172221 #4, #5 in diag