{"product_id":"mermade-30-round-4-17-32-hub-zipper-closure-complete","title":"Mermade 30\" Round (4-17\/32\" Hub) Zipper Closure, Complete","description":"\u003cp data-path-to-node=\"0\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"4\"\u003eMer-Made 30\" Round Complete Vacuum DE Filter Leaf Assembly (4-17\/32\" Hub, Zipper Closure)\u003c\/b\u003e\u003cspan\u003e is a circular commercial drop-in replacement element engineered for legacy cylindrical vacuum DE filter pits and round-tank commercial filtration systems (including classic Swimquip,\u003c\/span\u003e\u003cspan\u003e B\/K,\u003c\/span\u003e\u003cspan\u003e and legacy Mer-Made round-tank arrays).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"1\"\u003e\u003cspan\u003eIn this configuration,\u003c\/span\u003e\u003cspan\u003e the circular disc frame measures \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"56\"\u003e30\" outside diameter (O.D.)\u003c\/b\u003e\u003cspan\u003e and features an oversized central effluent manifold hub with a \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"147\"\u003e4-17\/32\" outer diameter hub bore\/collar\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 115 mm).\u003c\/span\u003e\u003cspan\u003e It is supplied factory-clothed with a tailored,\u003c\/span\u003e\u003cspan\u003e heavy-duty marine-grade \u003c\/span\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"277\"\u003ezipper closure\u003c\/b\u003e\u003cspan\u003e synthetic fabric bag that zips smoothly around the perimeter seam to maintain drum-tight cloth tension across the circular face.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eTechnical Specifications \u0026amp; Dimensions\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\"\u003eManufacturer \/ Line\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,1,1,0\"\u003eMer-Made Filter (Round Tank Vacuum DE Replacement)\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\"\u003eNominal Frame Profile\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\"\u003e30\" Diameter Circular Disc\u003c\/b\u003e (approx. 762 mm O.D.)\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\"\u003eEffective Filtration Surface Area\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\"\u003e9.8 sq. ft.\u003c\/b\u003e nominal (both circular 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=\"4,4,0,0\"\u003e\u003cb data-path-to-node=\"4,4,0,0\" data-index-in-node=\"0\"\u003eCenter Hub Dimension\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\"\u003e4-17\/32\" O.D. Hub\u003c\/b\u003e (approx. 115.1 mm) center core penetration\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\"\u003eClosure Mechanism\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,5,1,0\"\u003eHeavy-duty, chemical-resistant \u003cb data-path-to-node=\"4,5,1,0\" 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=\"4,6,0,0\"\u003e\u003cb data-path-to-node=\"4,6,0,0\" data-index-in-node=\"0\"\u003eInternal Matrix \/ Framing\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,6,1,0\"\u003eHigh-rigidity radial drainage grid core with molded outer rim and structural center hub collar\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\"\u003eAssembly Scope (\"Complete\")\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,7,1,0\"\u003eStructural circular core frame, internal radial drainage matrix, molded 4-17\/32\" center hub, pre-fitted synthetic woven filter cover with perimeter zipper, and internal center-hub sealing gaskets\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\"\u003eRecommended Design Flow Rate\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,8,1,0\"\u003e\u003cb data-path-to-node=\"4,8,1,0\" data-index-in-node=\"0\"\u003e9.8 to 14.7 GPM per leaf\u003c\/b\u003e (based on standard commercial flux rate of 1.0 to 1.5 GPM\/sq. ft.)\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\"\u003eOperating Vacuum Limit\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"4,9,1,0\"\u003eBackwash triggered at \u003cb data-path-to-node=\"4,9,1,0\" data-index-in-node=\"22\"\u003e10\" to 12\" Hg\u003c\/b\u003e differential (maximum operating head loss \u003cb data-path-to-node=\"4,9,1,0\" data-index-in-node=\"78\"\u003e15\" Hg\u003c\/b\u003e)\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\"\u003eStructural Architecture \u0026amp; Construction Details\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\"\u003eRadial Flow Drainage Matrix:\u003c\/b\u003e\u003cspan\u003e Molded polypropylene or ABS structural disc core engineered with radial drainage spokes converging inward toward the center 4-17\/32\" collector hub.\u003c\/span\u003e\u003cspan\u003e Resists inward face collapse under continuous vacuum loads up to 15\" Hg.\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\"\u003e4-17\/32\" Center Hub Interface:\u003c\/b\u003e\u003cspan\u003e Precision-machined Schedule 80 PVC or molded hub ring engineered to slide over circular vacuum DE collector pipe headers.\u003c\/span\u003e\u003cspan\u003e Machined internal\/external gasket grooves accommodate elastomeric O-rings or flat gaskets to isolate the vacuum manifold from tank water.\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\"\u003ePerimeter Zipper System:\u003c\/b\u003e\u003cspan\u003e Heavy-duty,\u003c\/span\u003e\u003cspan\u003e corrosion-proof polymer teeth zipper (Delrin\/nylon with locking slider) running along the outer circumference seam.\u003c\/span\u003e\u003cspan\u003e Allows field operators to zip the cover tightly over the circular rim,\u003c\/span\u003e\u003cspan\u003e providing uniform radial tension and preventing the fabric bagging common with drawstring or lace-up round styles.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,3,0\"\u003e\u003cb data-path-to-node=\"7,3,0\" data-index-in-node=\"0\"\u003eTailored Polypropylene Septum Jacket:\u003c\/b\u003e\u003cspan\u003e Factory-fitted,\u003c\/span\u003e\u003cspan\u003e woven monofilament or multifilament polypropylene fabric calibrated for 20–30 micron diatomaceous earth pre-coat retention.\u003c\/span\u003e\u003cspan\u003e Resists rot,\u003c\/span\u003e\u003cspan\u003e chlorine shock,\u003c\/span\u003e\u003cspan\u003e and dilute acid descaling baths.\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 Complete Leaf Net Weight:\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"51\"\u003e9.5 to 12.0 lbs (4.3 to 5.4 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 Leaf Shipping Weight:\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"49\"\u003e15.0 to 18.5 lbs (6.8 to 8.4 kg)\u003c\/b\u003e\u003cspan\u003e in flat square corrugated cartons (approx.\u003c\/span\u003e\u003cspan\u003e 33\" × 33\" × 4\") with corner and edge protectors.\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\"\u003eCommercial Grid Lot (10 to 20 Leaves):\u003c\/b\u003e\u003cspan\u003e Approximately \u003c\/span\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"53\"\u003e160 to 290 lbs (73 to 132 kg)\u003c\/b\u003e\u003cspan\u003e freight-stacked and banded on a standard 40\" × 48\" or 48\" × 48\" wooden skid.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"12\"\u003eField Installation \u0026amp; Shaft Stacking Guidelines\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\"\u003eClean Center Manifold Shaft:\u003c\/b\u003e\u003cspan\u003e Wipe and wire-brush the central vacuum manifold pipe to remove accumulated calcium scale,\u003c\/span\u003e\u003cspan\u003e calcified DE,\u003c\/span\u003e\u003cspan\u003e and mineral burrs that could gouge the 4-17\/32\" hub seals.\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\"\u003eInspect Hub Seals \u0026amp; Spacers:\u003c\/b\u003e\u003cspan\u003e Slide the replacement sealing ring or gasket over the shaft ahead of the leaf (or verify internal hub O-ring seating inside the 4-17\/32\" bore).\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\"\u003eSlide Leaf onto Center Shaft:\u003c\/b\u003e\u003cspan\u003e Guide the complete 30\" round element onto the center manifold shaft through the 4-17\/32\" hub,\u003c\/span\u003e\u003cspan\u003e seating it squarely against the preceding manifold spacer or shoulder.\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\"\u003eVerify Zipper Security:\u003c\/b\u003e\u003cspan\u003e Ensure the perimeter zipper slider is fully closed and tucked into its protective pocket\/flap so it does not catch on adjacent leaves.\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\"\u003eTorque Stack Compression:\u003c\/b\u003e\u003cspan\u003e Once all round leaves and inter-element hub spacers are stacked onto the center shaft,\u003c\/span\u003e\u003cspan\u003e tighten the end compression plate or tie-rod assembly to compress all hub gaskets and establish a vacuum-tight seal across the entire manifold stack.\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":68168408006767,"sku":"DE-R30ZC","price":1242.0,"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-complete","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}