Description
This filter set is the exact replacement required for specific Master Spas Trainer Series, Challenger Series, and Michael Phelps Swim Spas. The R4 cartridge, built with a 1.5‑inch male pipe thread connector, is designed to house the EcoPur® Charge Mineral Cartridge inside. The two PWW50P3 cartridges install alongside the R4 to complete the filtration system, ensuring the water clarity and purification balance your swim spa was engineered for.
Includes:
- 1 × Master Clear MA‑R4 Filter (1.5" MPT) – Primary cartridge designed to capture dirt, debris, and particles.
- 1 × EcoPur® Charge Mineral Cartridge – Fits inside the R4 for mineral purification.
- 2 × Master Clear PWW50P3 Filters – Cartridges that work with the R4 to deliver full system performance.
Important Fit Notes:
- ✅ Fits 2025 Trainer 12
- ✅ Fits all years MP Swim Force and Force D (except 2017)
- ✅ Fits all years MP Signature D
- ✅ Fits 2024 and older Challenger 15 D
- ✅ Fits 2024 and older Trainer 15 and Trainer 15 D
- ✅ Fits all years Challenger 18 D and 18 D Pro
- ✅ Fits 2015 and newer Trainer 18
- ✅ Fits all Trainer 18 D
- ✅ Fits all MP Swim Signature D
- ✅ Fits all MP Swim Signature (except 2017)
- ✅ Fits all MP Swim Signature S
- ❌ Not compatible with newer 2025+ models using the R4 (2" FPT) bundle
🗓️ Replacement Schedule
- Filters: Replace every 12 months with regular care, or every 6 months with heavier use
- EcoPur® cartridge (inside the R4): Replace every 6 months
Please verify your swim spa’s model and production year before purchase. Due to the nature of the product, we cannot accept returns on opened or incorrectly ordered filter sets.
