{"product_id":"unicel-pg-1902","title":"Unicel PG-1902 Replacement Filter for Hayward DEX2420DC","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel PG-1902 is a complete DE filter grid replacement set engineered for vertical-style diatomaceous earth filter housings, supplied as a full sector assembly with the manifold-compatible geometry required for the Hayward DEX2420DC platform and equivalent housings. Grid construction utilizes nonwoven polyester fabric bonded to powder-coated steel frame sectors, configured for axial loading against the upper and lower manifold plates. The assembly meets the dimensional envelope of standard 24 sq ft DE filter housings; sector height, hub bore, and manifold pin geometry are held to OEM tolerance for drop-in fit. Fabric is rated for continuous service at standard pool water temperatures (≤ 104°F) and operating pressures to 30 PSI. DE loading specification: 1 lb diatomaceous earth per 10 sq ft of grid surface, recharged after each backwash cycle, for full housing media charge consistent with manufacturer's housing label.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: backwash when ΔP rises 5–8 PSI above clean operating baseline; recharge DE media immediately following each backwash to restore filtration efficiency. Full disassembly, inspection, and grid cleaning is recommended annually, with fabric inspection for tears exceeding 1 inch, frame corrosion, or delamination from the steel sector — replace the full grid set if any sector fails inspection to preserve uniform flow distribution and prevent DE blowback. Chemical compatibility: polyester grid fabric tolerates continuous service at ≤ 10 ppm free available chlorine and is compatible with muriatic acid wash at 1:20 dilution (20-minute maximum exposure, thorough freshwater rinse before reinstallation) for calcium scale removal; enzyme degreasers are compatible without restriction for oil and surfactant fouling. Verify manifold O-ring and air bleed assembly condition at every grid service; post-installation, run the system and confirm clean operating pressure against the documented baseline before returning the filter to service. Standard Unicel 90-day manufacturing defect warranty applies through authorized distribution.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eYour order includes the selected quantity of DE filter grid sets. Each unit is individually inspected for quality before shipping.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":42315919130670,"sku":"UNFPG1902","price":24.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNFPG1902_4e50b813-710c-4b77-8b4a-119b2e80b5e5.jpg?v=1777663880","url":"https:\/\/poolzilla.com\/products\/unicel-pg-1902","provider":"Poolzilla","version":"1.0","type":"link"}