{"product_id":"pentairuniondiamondsealkit25410016zpen410016z","title":"Pentair Union Diamond Seal Kit 2.5\" | 410016Z","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair 410016Z 2.5\" Union Diamond Seal Kit (2-Pack)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair 410016Z is an OEM 2.5\" union diamond seal kit used to create a watertight seal at the pump union connection on\n    compatible Pentair and Sta-Rite pump models that use 2.5\" diamond-seal style unions. Replacing worn seals helps eliminate\n    drips at the union, reduce suction-side air leaks, and keep your pump running efficiently.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Pentair\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 410016Z\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeal Type:\u003c\/strong\u003e Diamond seal gasket (union seal)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2.5\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 2 seals per set\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Pump union sealing surface (between the union tailpiece and pump port union face)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Compatible Pump Applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePentair \u003cstrong\u003eWhisperFloXF\u003c\/strong\u003e pumps that use 2.5\" unions\u003c\/li\u003e\n    \u003cli\u003ePentair \u003cstrong\u003eIntelliFloXF\u003c\/strong\u003e pumps that use 2.5\" unions\u003c\/li\u003e\n    \u003cli\u003eSta-Rite \u003cstrong\u003eMax-E-Pro XF\u003c\/strong\u003e pumps that use 2.5\" unions\u003c\/li\u003e\n    \u003cli\u003eSelect \u003cstrong\u003ePentair IntelliFlo3 \/ IntelliPro3\u003c\/strong\u003e configurations that use 2.5\" diamond-seal union connections\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Fit is best confirmed by checking your existing union seal size (2.5\") and verifying your pump uses a diamond-seal style union gasket.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat This Seal Does\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eProvides the primary sealing surface at the union connection to prevent water leaks.\u003c\/li\u003e\n    \u003cli\u003eHelps prevent air from being pulled into the pump on suction-side unions (which can cause bubbles, noise, or priming issues).\u003c\/li\u003e\n    \u003cli\u003eMaintains a service-friendly union connection for easier pump removal and maintenance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDripping or weeping at the pump union connection\u003c\/li\u003e\n    \u003cli\u003eFlattened, cracked, swollen, or torn gasket\/seal\u003c\/li\u003e\n    \u003cli\u003eUnion must be overtightened to stop a leak\u003c\/li\u003e\n    \u003cli\u003eUnion was disconnected for service and the old seal no longer reseals reliably\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTurn off power to the pump and relieve system pressure before opening any union connection.\u003c\/li\u003e\n    \u003cli\u003eClean both sealing faces thoroughly (no grit, old rubber, or scale) before installing the new seal.\u003c\/li\u003e\n    \u003cli\u003eSeat the diamond seal evenly and flat—do not twist or pinch it.\u003c\/li\u003e\n    \u003cli\u003eHand-tighten the union nut until snug; avoid overtightening which can distort the seal and cause leaks.\u003c\/li\u003e\n    \u003cli\u003eAfter startup, recheck the union once the system is fully primed and running.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tip\u003c\/h3\u003e\n  \u003cp\u003e\n    If a union starts leaking, inspect for debris on the sealing faces before replacing parts. A small piece of grit on the union face can\n    create a slow drip that looks like a failed gasket.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eRelated Products (Aqua Pool Supply)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=2.5%20inch%20pump%20union\"\u003e2.5\" pump unions and tailpieces\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=WhisperFloXF%20parts\"\u003ePentair WhisperFloXF replacement parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=IntelliFloXF%20parts\"\u003ePentair IntelliFloXF replacement parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Max-E-Pro%20XF%20parts\"\u003eSta-Rite Max-E-Pro XF replacement parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pump%20union%20lube\"\u003eUnion O-ring lubricant (pool-safe)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589966852412,"sku":"410016Z","price":14.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-union-diamond-seal-kit-25-410016z-pump-parts-2973226.jpg?v=1770125296","url":"https:\/\/aquapoolsupply.com\/products\/pentairuniondiamondsealkit25410016zpen410016z","provider":"Aqua Pool Supply","version":"1.0","type":"link"}