{"product_id":"master-spas-r4-15-mpt-three-ma40-filter-set","title":"MasterSpas R4 (1.5\" MPT) \u0026 Three MA40 Filter Set","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp\u003eThis filter set is the \u003cstrong\u003eexact replacement\u003c\/strong\u003e required for the \u003cem\u003e2025 MasterSpas Challenger 19 D\u003c\/em\u003e and \u003cem\u003eTrainer 19 D Max\u003c\/em\u003e swim spas. The R4 cartridge, built with a \u003cstrong\u003e1.5‑inch male pipe thread connector\u003c\/strong\u003e, 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.\u003c\/p\u003e\n\u003cp\u003eIncludes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Master Clear MA‑R4 Filter (1.5\" MPT)\u003c\/strong\u003e – Primary cartridge designed to capture dirt, debris, and particles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × EcoPur® Charge Mineral Cartridge\u003c\/strong\u003e – Fits inside the R4 for mineral purification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 × Master Clear MA‑40 Filters\u003c\/strong\u003e – Cartridges that work with the R4 to deliver full system performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImportant Fit Notes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fits \u003cstrong\u003e2025 Challenger 19 D\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e✅ Fits \u003cstrong\u003e2025 Trainer 19 D Max\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e❌ Not compatible with other Trainer or Challenger models outside these specifications\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e🗓️ \u003cstrong\u003eReplacement Schedule\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilters: Replace every \u003cstrong\u003e12 months\u003c\/strong\u003e with regular care, or every \u003cstrong\u003e6 months\u003c\/strong\u003e with heavier use\u003c\/li\u003e\n\u003cli\u003eEcoPur® cartridge (inside the R4): Replace every \u003cstrong\u003e6 months\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePlease 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.\u003c\/p\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Master Spas","offers":[{"title":"Default Title","offer_id":45344535281801,"sku":null,"price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6491\/7641\/files\/R4_and_3_MA40.webp?v=1772582795","url":"https:\/\/shop.masterspaswest.com\/products\/master-spas-r4-15-mpt-three-ma40-filter-set","provider":"MasterSpas West","version":"1.0","type":"link"}