{"product_id":"pentair-mastertemp-sta-rite-max-e-therm-heater-shaft-seal-u109-93ss","title":"Pentair Shaft Seal 5\/8\" Buna | Sta-Rite Dura-Glas \u0026 Max-E-Glas (Pre-1998) | U109-93SS","description":"\u003cp\u003eThe Pentair U109-93SS (also known as 5056-08) is the replacement shaft seal for pre-1998 Sta-Rite Dura-Glas and Max-E-Glas pool pumps. This 5\/8-inch Buna rubber \"old style\" seal is designed for copper insert pump configurations.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eThe shaft seal sits at the interface between the pump motor's rotating shaft and the impeller. When this seal wears or fails, water can migrate past it and into the motor, causing accelerated corrosion and component damage. Replacing the shaft seal at the first sign of weeping or leakage at the pump shaft prevents consequential damage to the motor and surrounding pump components.\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;\"\u003eU109-93SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e5\/8\" shaft\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\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eBuna rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e1.3\" Length, 1.2\"\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\u003eCompatible Pump Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eOld style — copper insert pumps (pre-1998)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eAlternative Part Numbers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e5056-08, 004547, 351021030, PSR-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, locate the part number stamped or molded on your existing seal and confirm it matches U109-93SS — this seal fits pre-1998 copper insert pumps only and is not interchangeable with later Sta-Rite shaft seal designs. When replacing the shaft seal, inspect the O-ring on the pump volute at the same time; replacing both sealing components together eliminates a second service visit if the O-ring is nearing the end of its service life.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-05-01 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":51774122623251,"sku":"U109-93SS","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PENU10993SS_0.jpg?v=1747699642","url":"https:\/\/poolaroo.com\/products\/pentair-mastertemp-sta-rite-max-e-therm-heater-shaft-seal-u109-93ss","provider":"Poolaroo","version":"1.0","type":"link"}