{"product_id":"master-clear-mar4-2-fpt-filter","title":"Master Clear® MA-R4 Filter - 2\" FPT","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe MA-R4 is the current-generation primary filter for a wide range of MasterSpas hot tubs and swim spas. Built with a 2-inch female pipe thread connection, it seats securely into your spa's filtration housing and is designed to accept the EcoPur® Charge Mineral Cartridge inside — giving your water both mechanical filtration and mineral purification in a single unit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis is the correct filter for 2025 and newer models in the series listed below. If your spa was manufactured before 2025, use the compatibility list to confirm — many of these models transitioned to the R4 from the MAR1 in recent years.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCompatible Models (2025–Current)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eTwilight Series:\u003c\/em\u003e TS 6.2, TS 67.25, TS 7.2, TS 7.25, TS 8.2, TS 8.25\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eMichael Phelps Legend Series:\u003c\/em\u003e MPL 30, MPL 700, MPL 800, MPL 850, MPL 900\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eH2X Swim Spas:\u003c\/em\u003e Therapool SE, Therapool D, Trainer 12, Trainer 15, Trainer 15D, Trainer 21D, Challenger 15D, Challenger 21D, Trainer 19D Max, Challenger 19D MAX\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eLiving Healthy Series:\u003c\/em\u003e LH L5, LH L6, LH S6, LH L7, LH S7\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eAlso Replaces the MAR1 Filter on Older Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe MA-R4 is the current-generation replacement for the MAR1 filter. If your spa is from the list below and was manufactured before 2025, this is your filter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eTwilight Series:\u003c\/em\u003e TS 6.1, TS 67.15, TS 7.1, TS 7.15, TS 8.3, TS 8.35, TS 87.3, TS FIT, TS MP\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eDown East Series:\u003c\/em\u003e Cape Cod, Exeter, Portsmouth, Somerset, Windsor, Windsor STS\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eLegacy Series:\u003c\/em\u003e LW 730L, LW Acclaim, LW Enterprise, LW Enterprise SE, LW Envision, LW Inspire, LW Inspire SE, LW Intrepid\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eLegend Series:\u003c\/em\u003e LSX, LSX 557, LSX 700, LSX 800, LSX 800 STS, LSX 850, LSX 850 STS, LSX 1000, LSX 1000 STS, LSX 1050, LSX 1050 STS\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eImportant Note for Pre-2025 Spas\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eMost MasterSpas hot tubs and swim spas manufactured before 2025 used a female port that accepted a male-threaded filter. Beginning in 2025, that relationship flipped — this MA-R4 has a female thread and is designed for the new male port configuration. 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.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eReplacement Schedule\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eReplace every 12 months under normal use, or every 6 months with heavier use. If you use the EcoPur® Charge Cartridge, replace it every 6 months.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eDue 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.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Master Spas","offers":[{"title":"Default Title","offer_id":45344531611785,"sku":null,"price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6491\/7641\/files\/MAR4.jpg?v=1780076421","url":"https:\/\/shop.masterspaswest.com\/products\/master-clear-mar4-2-fpt-filter","provider":"MasterSpas West","version":"1.0","type":"link"}