Description
This filter set contains two MA-R3 filters for MasterSpas H2X swim spas that require dual primary filtration. Both filters are EcoPur® Charge compatible, meaning each can house a mineral cartridge inside its core for enhanced water quality. EcoPur® cartridges are sold separately.
Compatible Models — Current Generation (2025+)
H2X Swim Spas: Therapool 13, Therapool 15
Important Note for Pre-2025 Spas
MasterSpas hot tubs and swim spas manufactured before 2025 used a 1.5-inch female port. The MA-R3 uses a 2-inch female thread. If your spa was manufactured before 2025, you may need a thread adapter for compatibility. If you know you need one, it is available for purchase separately on our site. If you are unsure, contact us before ordering and we will confirm the right fit for your specific model and year.
Replacement Schedule
Replace both filters every 12 months under normal use, or every 6 months with heavier use. If you use EcoPur® Charge Cartridges, replace each one 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.
