Description
This filter set is the exact replacement required for the 2025 MasterSpas Challenger 19 D and Trainer 19 D Max 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 three MA40 cartridges install alongside the R4 to complete the filtration system, delivering the full 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.
- 3 × Master Clear MA‑40 Filters – Cartridges that work with the R4 to deliver full system performance.
Important Fit Notes:
- ✅ Fits 2025 Challenger 19 D
- ✅ Fits 2025 Trainer 19 D Max
- ❌ Not compatible with other Trainer or Challenger models outside these specifications
🗓️ 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.
