Threaded Air bleed & Drain Plug with o-ring for all Astral & Hurlcon ZX, QX, and CL cartridge filters. Also used as the drain plug on cartridge filters. May also suit other brands of cartridge filters that use the same thread.
Old Manufacturer's Part Number: 78205 & 78207
New Manufacturer's Part Number: 78103 & 78705
Genuine Astral Hurlcon Replacement Part.