{"product_id":"pentairwaterpoolandspainc_50901600","title":"Pentair Sight Glass® 1-1\/2\" Slip | Sand \u0026 D.E. Filters | 50901600","description":"\u003ch3\u003eOEM Replacement Sight Glass for Sand and D.E. Filters\u003c\/h3\u003e\n\n\u003cp\u003eThe Pentair Sight Glass® (50901600) is the OEM replacement 1-1\/2\" slip sight glass for Pentair sand and D.E. filters. If your existing sight glass is cracked, cloudy, or leaking, this is the direct replacement part.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\n\u003cp\u003eThe sight glass provides a visual inspection port on the filter's multiport valve or plumbing assembly, allowing you to observe water flow and clarity during backwash and rinse cycles. A damaged or fogged sight glass makes it impossible to judge when the backwash cycle is complete — replacing it restores accurate visual feedback during routine filter maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e50901600\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eSlip (solvent weld)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eConnection Size\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e1-1\/2\"\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eSand and D.E. Filters\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\n\u003cp\u003eBefore ordering, confirm the connection size and type on your existing sight glass — this listing is the 1-1\/2\" slip version. If your plumbing uses threaded fittings rather than slip connections, verify the correct variant before purchasing. Match the part number on your existing component or consult your filter's installation manual to confirm fitment.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-04-04 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53932869517587,"sku":"50901600","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/pentair-sight-glass-1-1-2-slip-sand-d-e-filters-50901600.webp?v=1779923889","url":"https:\/\/poolaroo.com\/products\/pentairwaterpoolandspainc_50901600","provider":"Poolaroo","version":"1.0","type":"link"}