The air-release plug is inserted into the lid of the MFS series filter vessel and serves to release the air pocket that can form during initial filling or after backwashing. Proper venting prevents water hammer and protects the pump from running dry.
The plug is made of durable plastic resistant to pool chemicals and the continuous pressure of the filtration circuit. The screw fitting with a sealing O-ring ensures reliable tightness with no risk of unintended loosening.
This is an affordable spare part whose timely replacement prevents more complicated and more expensive repairs of the entire MFS filtration assembly.
