Pentair R172540 Filter Lid Assembly with Chlorine/Bromine Dispenser fits the following filter models:
     Dynamic Series II and III
         

Specifications
Pentair R172540 Filter Lid Assembly with Chlorine/Bromine Dispenser includes the following:
   1 - Filter Lid
   1 - R33017        O-ring, control valve
   1 - R18854        Stop pin
   1 - R172224X   Drain and vent valve, black
   1 - R172221      O-ring for drain and vent valve
   1 - R172400       Inlet Screen
   1 - R172222      Gasket, cartridge
   1 - R172223      O-ring for lid to housing
   1 - R172457      Replacement Inner Chamber
   1 - R172451      O-ring, check valve
   1 - R172401      Screen, check valve
   1 - R172406      Check valve assembly
   1 - R172036      Silicone Lubricant

Manufacturer
Pentair