{"product_id":"toread-spa-filter-cartridge-pwk35b-replacement-for-hot-springs-limelight-14-1-8-x-6-3-8-35-sq-ft-trilobal-media","title":"TOREAD spa filter cartridge PWK35B replacement for Hot Springs Limelight – 14 1\/8\" x 6 3\/8\", 35 sq ft trilobal media","description":"\u003cp\u003e\u003cstrong\u003eTOREAD PWK35B is a direct-fit replacement spa filter cartridge engineered to restore water clarity for Hot Springs Limelight-series spas and equivalent models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your spa is losing circulation or water looks cloudy, the filter cartridge is often the simplest component to swap. The TOREAD PWK35B replacement is built to match OEM dimensions while improving debris capture and durability. It’s NSF\/ANSI 50 tested material and designed for easy upkeep so you spend less time maintaining your spa and more time enjoying it.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this cartridge fit my Hot Springs Limelight-series spa?\u003c\/h3\u003e\n\u003cp\u003eThe TOREAD PWK35B was manufactured to meet the same critical dimensions as common Limelight cartridges: approximately 14 1\/8\" long with a 6 3\/8\" outer diameter and 2\" open shoulders top and bottom. That means a straightforward swap for models that accept PWK35B-style filters. Always compare part numbers and measurements before purchasing to confirm compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLength: 14 1\/8\" (approx.)\u003c\/li\u003e\n  \u003cli\u003eOuter diameter: 6 3\/8\"\u003c\/li\u003e\n  \u003cli\u003eTop \u0026amp; bottom openings: 2\" each\u003c\/li\u003e\n  \u003cli\u003eReplaces: PWK35B, Watkins 1642301-1, Filbur FC-3921, Unicel C-6350\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the TOREAD filter more effective than basic cartridges?\u003c\/h3\u003e\n\u003cp\u003eThis cartridge uses a multilobed (trilobal) filtration fabric that traps finer and more varied particles than traditional point-bond media. Its design sustains flow while holding more debris, which reduces the need for frequent rinsing and keeps pump pressure stable. The reinforced internals and thicker fabric give it a longer useful life under typical spa chemical conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFiltration area: 35 sq. ft. for greater capture surface\u003c\/li\u003e\n  \u003cli\u003eTrilobal fabric captures 21–40% more debris versus standard media\u003c\/li\u003e\n  \u003cli\u003e25% thicker fabric and reinforced center support for longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I care for and clean this replacement cartridge?\u003c\/h3\u003e\n\u003cp\u003eRinse the cartridge with a garden hose every 2–3 weeks, focusing on pleats to dislodge trapped contaminants; the trilobal weave releases debris quickly. Do not backwash or use aggressive mechanical methods that could warp the end caps or center support. Periodic deep-soak cleaners formulated for spa filters are acceptable when needed, followed by a full rinse.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended rinsing interval: every 2–3 weeks\u003c\/li\u003e\n  \u003cli\u003eAvoid backwashing to prevent structural damage\u003c\/li\u003e\n  \u003cli\u003eUse gentle filter cleaner for occasional deep cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this product certified and built to industry standards?\u003c\/h3\u003e\n\u003cp\u003eYes—TOREAD pool and spa cartridges are tested to NSF\/ANSI 50 standards, ensuring the materials meet recognized performance and safety criteria for pools and spas. TOREAD is also a member of the Pool \u0026amp; Hot Tub Alliance, reflecting the brand’s alignment with industry best practices. While this is an independent replacement cartridge, it’s engineered to match OEM fit and function closely.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNSF\/ANSI 50 tested materials\u003c\/li\u003e\n  \u003cli\u003eMember of the Pool \u0026amp; Hot Tub Alliance (PHTA)\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet strict OEM dimensions for fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Spa owners of Hot Springs Limelight models and anyone using compatible cartridges who want a durable, higher-efficiency replacement. This filter suits homeowners who prefer less frequent cleaning, stronger debris capture, and a robust cartridge that tolerates common spa chemicals. If you value a direct-fit, NSF-tested replacement with reinforced components and a larger filtration area, the TOREAD PWK35B is built to meet those needs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this filter fit my Limelight Pulse spa?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the TOREAD PWK35B matches common Limelight dimensions (14 1\/8\" length, 6 3\/8\" diameter) and fits Pulse, Flair, Flash, and Beam models that accept PWK35B-style cartridges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I clean the cartridge?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Rinse every 2–3 weeks under a garden hose; use a filter soak cleaner occasionally. Do not backwash to avoid damaging the cartridge.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TOREAD","offers":[{"title":"Default Title","offer_id":56830011965780,"sku":"B0B59B7Q8S","price":89.23,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/toread-pwk35b-front-view.jpg?v=1787000126","url":"https:\/\/gardenluxe.co.uk\/products\/toread-spa-filter-cartridge-pwk35b-replacement-for-hot-springs-limelight-14-1-8-x-6-3-8-35-sq-ft-trilobal-media","provider":"Gardenluxe Uk","version":"1.0","type":"link"}