{"title":"11ft Swim Spas Parts \u0026 Accessories","description":"\u003cp\u003eReplacement filters and parts for 11ft MasterSpas swim spas including the Therapool 11 D \u0026amp; SE. Use our year selector above to make sure you get the right filter for your model year.\u003c\/p\u003e","products":[{"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"},{"product_id":"master-spas-r1-ma40-filter-set","title":"MasterSpas R1 (2\" FPT) \u0026 MA40 (2\" FPT) Filter Set","description":"\u003cdiv data-shopify-editor-block='{\"id\":\"template--19785348153556__main__description\",\"domId\":\"description\",\"type\":\"description\"}' class=\"product__description rte quick-add-hidden\"\u003e\n\u003c!--StartFragment --\u003e\n\u003cp\u003eThis filter set is the \u003cstrong\u003eexact replacement\u003c\/strong\u003e required for \u003cem\u003eMasterSpas Legacy Series\u003c\/em\u003e and \u003cem\u003eMichael Phelps Legend Series\u003c\/em\u003e hot tubs manufactured in \u003cstrong\u003e2024 or earlier\u003c\/strong\u003e. It also fits \u003cem\u003eH2X Therapool SE and D models manufactured in 2024 or earlier\u003c\/em\u003e, as well as select \u003cstrong\u003e2025 Legacy and Michael Phelps Legend models built in the Heritage style\u003c\/strong\u003e. This combination of cartridges provides the proper filtration and mineral purification capacity your 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‑R1 Filter (2\" FPT)\u003c\/strong\u003e – Captures dirt, debris, and particles for superior water clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Master Clear MA‑40 Filter (2\" FPT)\u003c\/strong\u003e – Larger capacity cartridge for enhanced filtration performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × EcoPur® Charge Mineral Cartridge\u003c\/strong\u003e – Natural mineral technology that conditions water, reduces chemical demand, and improves overall water quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImportant Fit Notes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fits all Legacy Series and Michael Phelps Legend Series spas manufactured in 2024 or earlier.\u003c\/li\u003e\n\u003cli\u003e✅ Fits H2X Therapool SE and D models manufactured in 2024 or earlier.\u003c\/li\u003e\n\u003cli\u003e✅ Fits select 2025 Legacy and Michael Phelps Legend models built in the Heritage style.\u003c\/li\u003e\n\u003cli\u003e❌ Not compatible with newer 2025+ models using updated filter configurations.\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: Replace every \u003cstrong\u003e6 months\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePlease verify your spa’s year and model before purchase. Due to the nature of the product, we cannot accept returns on opened or incorrectly ordered filter sets.\u003c\/p\u003e\n\u003c!--EndFragment --\u003e\n\u003c\/div\u003e","brand":"Master Spas","offers":[{"title":"Default Title","offer_id":45344534331529,"sku":"r1-ma40-set","price":194.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6491\/7641\/files\/r1-ma40set.jpg?v=1780685528"},{"product_id":"master-spas-r4-2-fpt-ma40-filter-set","title":"MasterSpas MA-R4 \u0026 MA40 Filter Set - 2\" FPT","description":"\u003cdiv data-shopify-editor-block='{\"id\":\"template--19785348153556__main__description\",\"domId\":\"description\",\"type\":\"description\"}' class=\"product__description rte quick-add-hidden\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis filter set contains the two filters your spa needs for complete filtration — the MA-R4 with EcoPur® Charge compatibility and the MA40 companion filter, both with 2-inch female pipe thread connections. Buying them together ensures you replace your full filtration system on the same schedule, keeping your water clean and your spa running at peak performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe MA-R4 is designed to accept the EcoPur® Charge Mineral Cartridge inside the filter core, combining mechanical filtration with mineral purification. The EcoPur® cartridge is sold separately.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCompatible Models — Current Generation (2025+)\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\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eAlso Replaces These Older Filter Sets\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eIf your spa previously used a PMA40L and MAR1 filter together, or two MAR1 filters, this set is their current-generation replacement.\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\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 — both filters in this set have a female thread 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 both filters 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\u003c\/div\u003e","brand":"Master Spas","offers":[{"title":"Default Title","offer_id":45344534462601,"sku":null,"price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6491\/7641\/files\/Master_Spas_MA40_and_R4_with_Eco.jpg?v=1780074105"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6491\/7641\/collections\/ch_19d_max_4b246f99-3d46-404f-ba4f-92a50b7084ac.webp?v=1780698066","url":"https:\/\/shop.masterspaswest.com\/collections\/12ft-swim-spas-parts-accessories-copy-1.oembed","provider":"MasterSpas West","version":"1.0","type":"link"}