{"product_id":"mermade-30-round-4-17-32-hub-zipper-closure-cover-only","title":"Mermade 30\" Round (4-17\/32\" Hub) Zipper Closure, Cover Only","description":"\u003cp data-path-to-node=\"0\" class=\"first-token\"\u003e\u003cspan class=\"\"\u003eThe \u003c\/span\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"4\"\u003eMer-Made 30\" Round (4-17\/32\" Hub) Zipper Closure — Cover Only\u003c\/b\u003e\u003cspan\u003e (cataloged under Part # \u003c\/span\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"90\"\u003e775-COVER \/ VFC-30R-ZIP-417\u003c\/b\u003e\u003cspan\u003e) is the tailored replacement synthetic fabric filter jacket envelope designed to re-cover existing bare circular leaf cores in round-tank commercial vacuum DE filter vaults and cylindrical surge-tank systems (including legacy Swimquip,\u003c\/span\u003e\u003cspan\u003e B\/K,\u003c\/span\u003e\u003cspan\u003e and circular Mer-Made filter arrays).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"1\"\u003e\u003cspan\u003eThis model is fabricated as a circular disc envelope measuring \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"63\"\u003e30\" outside diameter (O.D.)\u003c\/b\u003e\u003cspan\u003e with a pre-cut,\u003c\/span\u003e\u003cspan\u003e reinforced \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"118\"\u003e4-17\/32\" central hub penetration collar\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 115.\u003c\/span\u003e\u003cspan\u003e1 mm) and a heavy-duty,\u003c\/span\u003e\u003cspan\u003e marine-grade \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"208\"\u003eperimeter Delrin\/nylon zipper closure\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003cspan\u003e It supplies only the tailored filtration cloth,\u003c\/span\u003e\u003cspan\u003e center hub cutouts,\u003c\/span\u003e\u003cspan\u003e perimeter zipper assembly,\u003c\/span\u003e\u003cspan\u003e and paired replacement hub sealing gaskets.\u003c\/span\u003e\u003cspan\u003e It is specified when the internal polypropylene radial drainage grid core and circular outer rim remain structurally sound,\u003c\/span\u003e\u003cspan\u003e but the existing cloth has blinded from mineral scaling,\u003c\/span\u003e\u003cspan\u003e calcified DE,\u003c\/span\u003e\u003cspan\u003e or body oils,\u003c\/span\u003e\u003cspan\u003e or has suffered abrasion tears.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eTechnical Specifications \u0026amp; Scope of Delivery\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"4\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter \/ Detail\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=\"4,1,0,0\"\u003e\u003cb data-path-to-node=\"4,1,0,0\" data-index-in-node=\"0\"\u003eModel \/ Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,1,1,0\"\u003eMer-Made Replacement Septum Jacket (Round-Tank Retrofit)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,2,0,0\"\u003e\u003cb data-path-to-node=\"4,2,0,0\" data-index-in-node=\"0\"\u003eConfiguration\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,2,1,0\"\u003e\u003cb data-path-to-node=\"4,2,1,0\" data-index-in-node=\"0\"\u003eCover Only\u003c\/b\u003e (Fabric envelope + zipper + gaskets; excludes internal grid core and frame)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,3,0,0\"\u003e\u003cb data-path-to-node=\"4,3,0,0\" data-index-in-node=\"0\"\u003eNominal Outer Diameter\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,3,1,0\"\u003e\u003cb data-path-to-node=\"4,3,1,0\" data-index-in-node=\"0\"\u003e30\" Diameter Circular Envelope\u003c\/b\u003e (approx. 762 mm flat circular profile)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,4,0,0\"\u003e\u003cb data-path-to-node=\"4,4,0,0\" data-index-in-node=\"0\"\u003eActive Filtration Surface Area\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,4,1,0\"\u003e\u003cb data-path-to-node=\"4,4,1,0\" data-index-in-node=\"0\"\u003e9.8 sq. ft.\u003c\/b\u003e nominal pre-coat area (both faces combined, net of central hub cutout)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,5,0,0\"\u003e\u003cb data-path-to-node=\"4,5,0,0\" data-index-in-node=\"0\"\u003eCenter Hub Penetration\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,5,1,0\"\u003eFactory-reinforced circular doughnut cutout sized for \u003cb data-path-to-node=\"4,5,1,0\" data-index-in-node=\"54\"\u003e4-17\/32\" O.D. Hub\u003c\/b\u003e (approx. 115.1 mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,6,0,0\"\u003e\u003cb data-path-to-node=\"4,6,0,0\" data-index-in-node=\"0\"\u003eFabric Composition\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,6,1,0\"\u003eHigh-tenacity, custom-woven \u003cb data-path-to-node=\"4,6,1,0\" data-index-in-node=\"28\"\u003emonofilament or multifilament polypropylene\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,7,0,0\"\u003e\u003cb data-path-to-node=\"4,7,0,0\" data-index-in-node=\"0\"\u003eFiltration Porosity\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,7,1,0\"\u003eCalibrated nominal \u003cb data-path-to-node=\"4,7,1,0\" data-index-in-node=\"19\"\u003e20 to 30 micron\u003c\/b\u003e pore rating for diatomaceous earth pre-coat retention\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,8,0,0\"\u003e\u003cb data-path-to-node=\"4,8,0,0\" data-index-in-node=\"0\"\u003eClosure Mechanism\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,8,1,0\"\u003eHeavy-duty, chemical-resistant \u003cb data-path-to-node=\"4,8,1,0\" data-index-in-node=\"31\"\u003emarine-grade Delrin\/nylon zipper\u003c\/b\u003e wrapping the perimeter rim\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,9,0,0\"\u003e\u003cb data-path-to-node=\"4,9,0,0\" data-index-in-node=\"0\"\u003eIncluded Accessories\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,9,1,0\"\u003ePaired replacement neoprene\/EPDM center hub compression gaskets or O-rings\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,10,0,0\"\u003e\u003cb data-path-to-node=\"4,10,0,0\" data-index-in-node=\"0\"\u003eExcluded Components\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,10,1,0\"\u003eRigid structural circular frame, internal radial drainage grid disc, molded Schedule 80 PVC center hub collar\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-path-to-node=\"6\"\u003eMaterial Properties \u0026amp; Chemical Tolerances\u003c\/h3\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eChlorine \u0026amp; Saline Resistance:\u003c\/b\u003e\u003cspan\u003e Virgin woven polypropylene fibers resist degradation,\u003c\/span\u003e\u003cspan\u003e rot,\u003c\/span\u003e\u003cspan\u003e and hydrolysis under continuous exposure to elevated free chlorine levels,\u003c\/span\u003e\u003cspan\u003e shock hyperchlorination treatments,\u003c\/span\u003e\u003cspan\u003e and saline electrolytic pool water (2,\u003c\/span\u003e\u003cspan\u003e500 to 5,\u003c\/span\u003e\u003cspan\u003e000+ ppm NaCl).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eAcid Wash Survivability:\u003c\/b\u003e\u003cspan\u003e Withstands routine seasonal chemical descaling baths in dilute muriatic (hydrochloric) or citric acid solutions to dissolve calcified DE crust,\u003c\/span\u003e\u003cspan\u003e calcium carbonate,\u003c\/span\u003e\u003cspan\u003e and iron scale without deteriorating seam threads or zipper tape.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\"\u003ePre-Coat Retention \u0026amp; Cake Release:\u003c\/b\u003e\u003cspan\u003e The balanced monofilament weave structure retains standard DE powder and perlite grades without bleed-through during initial pump startup,\u003c\/span\u003e\u003cspan\u003e while facilitating clean cake release during backwashing or manual hose-down.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"9\"\u003ePhysical Dimensions \u0026amp; Weight Estimates\u003c\/h3\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eIndividual Cover Net Weight:\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"43\"\u003e0.80 to 1.10 lbs (0.36 to 0.50 kg)\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eSingle Boxed Cover Shipping Weight:\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"50\"\u003e1.70 to 2.50 lbs (0.77 to 1.13 kg)\u003c\/b\u003e\u003cspan\u003e in a compact corrugated carton.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eMaster Carton \/ Multi-Pack (6 to 12 Covers):\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"59\"\u003e7.0 to 13.5 lbs (3.2 to 6.1 kg)\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eFull Bank Overhaul Pack (20 to 30 Covers):\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"57\"\u003e19.0 to 30.0 lbs (8.6 to 13.6 kg)\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"12\"\u003eField Re-Covering \u0026amp; Tensioning Steps\u003c\/h3\u003e\n\u003col start=\"1\" data-path-to-node=\"13\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,0,0\"\u003e\u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"\u003eStrip Old Jacket \u0026amp; Inspect Frame:\u003c\/b\u003e\u003cspan\u003e Remove the spent circular leaf from the center manifold shaft.\u003c\/span\u003e\u003cspan\u003e Unzip the spent jacket around the outer rim and peel the fabric away from the core.\u003c\/span\u003e\u003cspan\u003e Discard old hub gaskets.\u003c\/span\u003e\u003cspan\u003e Pressure-wash the bare radial drainage grid to dislodge calcified DE,\u003c\/span\u003e\u003cspan\u003e and inspect the outer rim and hub edges for burrs,\u003c\/span\u003e\u003cspan\u003e cracks,\u003c\/span\u003e\u003cspan\u003e or sharp edges that could snag the new cover.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,1,0\"\u003e\u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"0\"\u003ePosition the Replacement Jacket:\u003c\/b\u003e\u003cspan\u003e Unzip the replacement cover fully and slide the bare circular core inside the envelope,\u003c\/span\u003e\u003cspan\u003e guiding the reinforced inner circular cutouts squarely over the 4-17\/32\" central hub collar on both faces.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,2,0\"\u003e\u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"0\"\u003eAlign Center Hub Collars:\u003c\/b\u003e\u003cspan\u003e Ensure the reinforced inner borders sit flat against the hub seating faces without puckering,\u003c\/span\u003e\u003cspan\u003e twisting,\u003c\/span\u003e\u003cspan\u003e or encroaching into the gasket sealing grooves.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,3,0\"\u003e\u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"0\"\u003eZip \u0026amp; Tension:\u003c\/b\u003e\u003cspan\u003e Bring the two outer halves of the cover together along the perimeter rim.\u003c\/span\u003e\u003cspan\u003e Smoothly pull the Delrin zipper slider around the circumference,\u003c\/span\u003e\u003cspan\u003e gently stretching the fabric outward toward the edges as you close the seam to ensure uniform radial tension across both disc faces.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,4,0\"\u003e\u003cb data-path-to-node=\"13,4,0\" data-index-in-node=\"0\"\u003eSecure Zipper Pull:\u003c\/b\u003e\u003cspan\u003e Tuck the zipper pull tab into its integrated protective elastic\/fabric pocket flap to prevent snagging on adjacent leaves during operation or stacking.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,5,0\"\u003e\u003cb data-path-to-node=\"13,5,0\" data-index-in-node=\"0\"\u003eInstall Hub Gaskets \u0026amp; Restack:\u003c\/b\u003e\u003cspan\u003e Place fresh hub sealing gaskets or O-rings onto the center hub faces before sliding the re-covered element back onto the collector manifold shaft.\u003c\/span\u003e\u003cspan\u003e Verify proper spacing between adjacent leaves before torquing down the shaft end-compression plate.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":68168433107055,"sku":"DE-R30ZCC","price":382.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/Mer-Made-Precoat_d7793c42-097b-4aa2-a027-68826537a441.jpg?v=1793719204","url":"https:\/\/commercialpoolandspasupplies.com\/products\/mermade-30-round-4-17-32-hub-zipper-closure-cover-only","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}