Master Clear® MA-R3 & EcoPur® Charge Filter Set - 2" FPT

This filter set pairs the MA-R3 primary filter with the EcoPur® Charge Mineral Cartridge, giving your spa everything it needs for complete filtration in one purchase. The MA-R3 houses the EcoPur® cartridge inside its core, combining mechanical filtration with mineral purification for clean, clear, and conditioned water.

Compatible Models — Current Generation (2025+)

Clarity Series: CLS Balance 6, CLS Balance 6 CS, CLS Balance 7, CLS Balance 8, CLS Balance 9, CLS Precision 7, CLS Precision 8

Instinct Series (2026+): Natural Instinct, Pure Instinct, Vital Instinct

H2X Swim Spas: Therapool 13, Therapool 15

Twilight Series: TS 240X

Also Compatible with These Older Models

Clarity Series: CLS 1055, CLS 524, CLS 730, CLS 730L, CLS 738, CLS 738L, CLS 855, CLS 855L, CLS Precision 67

Down East Series: East Hampton

Healthy Living Series: HL 616L, HL 620L, HL 624L, HL 628L, HL 630L, HL 7, HL 7 NS, HL 7.5, HL 740L, HL 8, HL 8.5, HL 8DL

MP Swim Series: Force, Force D, Momentum 80, Momentum 80 D, Signature

Twilight Series: TS 120, TS 240

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 the MA-R3 filter every 12 months under normal use, or every 6 months with heavier use. Replace the EcoPur® Charge Cartridge 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.