Part # Description
#2  –  20981 Air Release Valve
#3  –  22139 Air Release Valve O’Ring
#4  –  20437 Filter Lid Locking Ring
#5  –  22137 Filter Lid O’Ring
#6  –  22353 Pressure Gauge
#7  –  2229 Filter Lid – Black
21981 EC 75 Cartridge
21982 EC 100 Cartridge
21983 EC 150 Cartridge
22136 Union O’Ring