Description
The MA-R4 1.5" MPT is the current-generation primary filter for a wide range of MasterSpas swim spas. Built with a 1.5-inch male pipe thread connection, it installs securely into your spa's filtration housing and is designed to accept the EcoPur® Charge Mineral Cartridge inside, delivering both mechanical filtration and mineral purification in a single unit. The EcoPur® cartridge is sold separately.
Unlike the 2" FPT version of the MA-R4, this filter uses a 1.5-inch male thread and does not require an adapter for pre-2025 swim spas.
Compatible Models — Current Generation
Legacy Swim Spas: LW 12, LW 15, LW 19
MP Swim Series: Momentum D, Signature Pro
Also Compatible with These Older Models
H2X Swim Spas: Challenger 18D, Challenger 18D Pro, Challenger 19D, Trainer 14, Trainer 17, Trainer 18, Trainer 18D, Trainer 19, Trainer 19D
MP Swim Series: Force, Force D, Impact, Momentum, Momentum 50, Momentum 80, Signature, Signature D, Signature S
Replacement Schedule
Replace every 12 months under normal use, or every 6 months with heavier use. If you use the EcoPur® Charge Cartridge, replace it every 6 months.
Due to the nature of filtration products, we cannot accept returns on opened or incorrectly ordered items. Please verify your model and production year before purchasing.
