{"product_id":"aquamatic-k521-111-1inch-retaining-ring-nut-assembly-viton-pair","title":"AquaMatic K521-111 1inch Retaining Ring \u0026 Nut Assembly Viton Pair 1071160","description":"\u003ch1 data-path-to-node=\"2\"\u003eAquaMatic K521-111 1\" Retaining Ring \u0026amp; Nut Assembly - Viton (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 K521-111 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 premium \u003cb data-index-in-node=\"13\" data-path-to-node=\"7\"\u003eViton-equipped configuration\u003c\/b\u003e contains a complete pair of nuts, split retaining rings, and high-performance Viton (FKM) O-rings. It provides the crucial mechanical clamping force and leak-tight face seal required to connect pipe adapters—such as the \u003cb data-index-in-node=\"262\" data-path-to-node=\"7\"\u003eK521-PC 1\" Solvent Weld Adapters (1070226)\u003c\/b\u003e—directly to the valve body. Because it utilizes Viton elastomers, this assembly is engineered specifically for systems exposed to high temperatures, aggressive chemicals, or harsh water treatment processes that would rapidly compromise standard sealing materials.\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 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 seat firmly into the 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 Viton (FKM) Face O-Rings:\u003c\/b\u003e High-performance, chemical-resistant 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\"\u003ePremium Viton Sealing:\u003c\/b\u003e Equipped with authentic Viton (FKM) O-rings for exceptional resistance against acids, caustics, ozone, and chlorinated water loops.\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\"\u003eRobust Mechanical Coupling:\u003c\/b\u003e Provides a reliable union connection, allowing the valve to be quickly disconnected from the pipework for maintenance or bench servicing without cutting 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 Matching:\u003c\/b\u003e Explicitly engineered by AqMatic \/ Pentair to fit the 1-inch K521 composite valve body thread and flange profiles.\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\"\u003eCorrosion-Resistant Components:\u003c\/b\u003e Constructed from high-durability engineered materials designed to withstand the harsh environments of chemical feed and water purification plants.\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\"\u003e1071160\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\"\u003eViton \/ FKM (Fluorocarbon Elastomer)\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; Compatibility\u003c\/h2\u003e\n\u003cp data-path-to-node=\"20\"\u003eThe K521-111 Viton assembly is the preferred choice for industrial and heavy commercial installations where fluid compatibility demands more than standard seals. It is widely used in:\u003c\/p\u003e\n\u003cul data-path-to-node=\"21\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,0,0\"\u003eDeionization (DI) exchange systems undergoing aggressive acid\/caustic regeneration cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,1,0\"\u003eChemical dosing, plating, and chemical handling distribution lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"21,2,0\"\u003eHigh-purity process water loops and high-temperature water treatment systems.\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 Viton O-ring is seated flat in the face groove without twists before hand-tightening the nut onto the valve body. Do not over-torque, as the high-precision engineered threads are designed to seal efficiently under standard hand-tight union loads.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"AQMATIC","offers":[{"title":"Default Title","offer_id":43726274265283,"sku":"11275000136 | 2001007175","price":28.5,"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-k521-111-1inch-retaining-ring-nut-assembly-viton-pair","provider":"GAPS Water Treatment","version":"1.0","type":"link"}