The Air Shut-off for Engine Unit (B9301723) is an essential spare part to ensure the correct functioning and watertight seal of your motor unit for MSpa hot tubs.

Designed to ensure a hermetic and resistant seal, it prevents water and dirt from entering the motor’s ventilation or suction system.
Thanks to its universal design and high compatibility with numerous MSpa motor units manufactured between 2019 and 2023, it is the official and certified solution for routine maintenance or replacement of the original air cap.

Contact us to check which replacement part is compatible with your MSpa.