{"product_id":"aquamatic-k521-109-1inch-retaining-ring-and-nut-assembly","title":"AquaMatic K521-109 1inch Retaining Ring and Nut Assembly (Pair) 1070244","description":"\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_6ba0a36aa0b51ff7\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\"\u003e\n\u003ch1 data-path-to-node=\"2\"\u003eAquaMatic K521-109 1\" Retaining Ring \u0026amp; Nut Assembly - EP (Pair)\u003cb data-index-in-node=\"0\" data-path-to-node=\"3\"\u003e\u003c\/b\u003e\n\u003c\/h1\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe \u003cb data-index-in-node=\"4\" data-path-to-node=\"6\"\u003eAquaMatic K521-109 Retaining Ring \u0026amp; Nut Assembly\u003c\/b\u003e is a factory-original, commercial-grade hardware kit designed to securely mount pipe end adapters to \u003cb data-index-in-node=\"154\" data-path-to-node=\"6\"\u003eAquaMatic K521 Series 1-inch composite body diaphragm valves\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003eThis standard \u003cb data-index-in-node=\"14\" data-path-to-node=\"7\"\u003eEP (EPDM) configuration\u003c\/b\u003e contains a complete pair of nuts, split retaining rings, and high-quality EPDM face O-rings. It provides the essential mechanical clamping force and leak-tight seal required to connect pipe adapters—such as the \u003cb data-index-in-node=\"249\" data-path-to-node=\"7\"\u003eK521-PC 1\" Solvent Weld Adapters (1070226)\u003c\/b\u003e—directly to the valve body ports. Utilizing EPDM elastomers makes this kit the perfect choice for everyday commercial and industrial water treatment applications, offering excellent resistance to ozone, sunlight, weathering, and mild alkaline or acidic solutions.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"9\"\u003eParts Included List\u003c\/h2\u003e\n\u003cp data-path-to-node=\"10\"\u003eOne kit contains enough hardware to complete both the inlet and outlet connections for a single 1\" K521 series valve. The assembly includes:\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,0,0\"\u003e2 x Heavy-Duty Union Retaining Nuts:\u003c\/b\u003e Threaded collars that draw the pipe adapter tightly against the valve port face.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,1,0\"\u003e2 x Split Retaining Rings:\u003c\/b\u003e Interlocking rings that snap firmly into the exterior grooves of the pipe adapters to distribute mechanical clamping pressure evenly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,2,0\"\u003e2 x EP (EPDM) Face O-Rings:\u003c\/b\u003e Durable, resilient elastomeric seals that prevent fluid bypassing at the connection interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"13\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"14,0,0\"\u003eResilient EPDM Sealing:\u003c\/b\u003e Features authentic EP (EPDM) O-rings that excel in hot and cold water applications, offering superb resistance to aging, ozone, and dilute chemicals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"14,1,0\"\u003eConvenient Union Coupling:\u003c\/b\u003e Creates a reliable, quick-disconnect union joint, allowing the valve to be rapidly removed from the pipework for bench servicing or routine internal maintenance without cutting into the lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"14,2,0\"\u003ePerfect 1\" System Fit:\u003c\/b\u003e Explicitly engineered by AqMatic \/ Pentair to match the 1-inch K521 composite valve body thread and flange profiles flawlessly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"14,3,0\"\u003eCost-Effective Durability:\u003c\/b\u003e Constructed from rugged, industrial-grade materials designed to provide long-lasting joint security in standard commercial water softener and filter setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"16\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable data-path-to-node=\"17\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,1,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,1,0,0\"\u003eBrand\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,1,1,0\"\u003eAquaMatic (AqMatic \/ Pentair)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,2,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,2,0,0\"\u003eModel Number\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,2,1,0\"\u003e1070244\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,3,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,3,0,0\"\u003eConnection Size\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,3,1,0\"\u003e1\" (25 mm) Valve Port Size\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,4,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,4,0,0\"\u003eElastomer Material\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,4,1,0\"\u003eEP \/ EPDM (Ethylene Propylene Diene Monomer)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,5,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,5,0,0\"\u003ePack Quantity\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,5,1,0\"\u003e1 Pair (Hardware for Both Valve Ports)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,6,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,6,0,0\"\u003eHardware Function\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,6,1,0\"\u003eConnects Grooved Pipe Adapters to Valve Body\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,7,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17,7,0,0\"\u003eValve Compatibility\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"17,7,1,0\"\u003eAquaMatic K521 \u0026amp; K551 Series Composite Valves\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 data-path-to-node=\"19\"\u003eApplications \u0026amp; Systems\u003c\/h2\u003e\n\u003cp data-path-to-node=\"20\"\u003eThe K521-109 EP hardware kit is the standard go-to assembly for conventional commercial and industrial water management, including:\u003c\/p\u003e\n\u003cul data-path-to-node=\"21\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,0,0\"\u003eCommercial water softeners and multimedia sand or carbon filtration backwash loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,1,0\"\u003ePre-treatment filtration arrays for Reverse Osmosis (RO) systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,2,0\"\u003eMunicipal and institutional water conditioning setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote data-path-to-node=\"22\"\u003e\n\u003cp data-path-to-node=\"22,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"22,0\"\u003eInstallation Tip:\u003c\/b\u003e Always remember to slide the union retaining nut and the split ring onto your pipe adapter \u003ci data-index-in-node=\"109\" data-path-to-node=\"22,0\"\u003ebefore\u003c\/i\u003e completing any permanent solvent welding or pipe jointing. Ensure the EPDM O-ring is seated completely flat in the face groove without twists before hand-tightening the nut onto the valve body. Hand-tighten firmly—the high-precision engineered threads are designed to seal efficiently without the need for high mechanical torque or heavy pipe wrenches.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003c\/div\u003e","brand":"AQMATIC","offers":[{"title":"Default Title","offer_id":43726274232515,"sku":"11275000135 | 2001007173","price":26.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/3227\/4627\/files\/K520109-3.jpg?v=1781607272","url":"https:\/\/www.gapswater.co.uk\/products\/aquamatic-k521-109-1inch-retaining-ring-and-nut-assembly","provider":"GAPS Water Treatment","version":"1.0","type":"link"}