Air exhaust connection kit. When placed at the air exhaust port instead of the standard air muffler, allows connecting a hose for air exhaust remote evacuation. required when the pump is mounted submerged or when the air exhaust has to be vented outside the pump room. Connection thread: 3/8″.
Pump silencer. When placed at the pump air exhaust port instead of the standard air muffler, it reduces the pump noise level below 70 dB. Includes air exhaust connection kit 558 405.