{"product_id":"pentaircentrifugalpumpshaftsealu109433sspenu109433ss","title":"Pentair Centrifugal Pump Shaft Seal | U109-433SS","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair U109-433SS Shaft Seal (1-1\/4\") – For Sta-Rite C\/CC Series \u0026amp; D Series Commercial Pumps (3 HP \u0026amp; 5 HP)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003ePentair U109-433SS\u003c\/strong\u003e is a replacement \u003cstrong\u003emechanical shaft seal\u003c\/strong\u003e (commonly referenced as a\n    \u003cstrong\u003e1-1\/4\" shaft seal\u003c\/strong\u003e) used in select \u003cstrong\u003eSta-Rite \/ Pentair commercial pump\u003c\/strong\u003e models. This seal is installed\n    where the motor shaft passes through the pump seal plate to help prevent water from leaking along the shaft into the motor.\n    Replacing a worn shaft seal is a common fix for pump leaks that appear at the motor-to-pump connection area.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e U109-433SS\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Mechanical shaft seal\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeal Size:\u003c\/strong\u003e 1-1\/4\" (commonly listed)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTypical Seal Material:\u003c\/strong\u003e Buna (rubber components) with standard mechanical seal faces\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Helps stop leakage at the motor shaft \/ seal plate area\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e U109-220 (older part reference)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eSta-Rite \/ Pentair \u003cstrong\u003eC Series\u003c\/strong\u003e and \u003cstrong\u003eCC Series\u003c\/strong\u003e centrifugal pumps (commonly 3 HP \u0026amp; 5 HP applications)\u003c\/li\u003e\n    \u003cli\u003ePentair \u003cstrong\u003eD Series\u003c\/strong\u003e commercial pumps\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Always confirm your pump model and horsepower using your parts diagram to verify this exact seal is correct.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Signs the Shaft Seal Needs Replacement\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater leaking from the area between the pump and motor (seal plate \/ motor bracket area)\u003c\/li\u003e\n    \u003cli\u003eDripping or spraying that increases when the pump is running\u003c\/li\u003e\n    \u003cli\u003eRepeated moisture around the motor base (after confirming it is not plumbing-related)\u003c\/li\u003e\n    \u003cli\u003eSeal replacement is recommended any time the pump is opened for major service (impeller, diffuser, seal plate)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTurn off power at the breaker before servicing the pump.\u003c\/li\u003e\n    \u003cli\u003eMechanical seals have precision faces—keep them clean and avoid touching the sealing faces with oily\/dirty hands.\u003c\/li\u003e\n    \u003cli\u003eInspect the \u003cstrong\u003eshaft sleeve\u003c\/strong\u003e and sealing surfaces; a grooved or corroded sleeve can cause a new seal to fail early.\u003c\/li\u003e\n    \u003cli\u003eVerify there is no wobble in the motor bearings; excessive shaft play can shorten seal life.\u003c\/li\u003e\n    \u003cli\u003eAfter reassembly, confirm the pump primes normally and check for leaks during the first run.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=U109-433SS\"\u003eSearch: U109-433SS Shaft Seal\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=C23-58\"\u003eSearch: C23-58 Shaft Sleeve\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=C20-101\"\u003eSearch: C20-101 Sleeve Gasket\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=sta-rite%20C%20series%20pump%20parts\"\u003eSearch: Sta-Rite C Series Pump Parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=sta-rite%20CC%20series%20pump%20parts\"\u003eSearch: Sta-Rite CC Series Pump Parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pentair%20D%20series%20pump%20parts\"\u003eSearch: Pentair D Series Pump Parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20pump%20o-ring%20lube\"\u003eSearch: Pool Pump O-Ring Lubricant\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFix the cause, not just the leak:\u003c\/strong\u003e Overheating (running dry), poor water chemistry, or misalignment can shorten seal life.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReplace the shaft sleeve if needed:\u003c\/strong\u003e A worn sleeve can cut into a new seal and cause repeat leaking.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKeep the pump from running dry:\u003c\/strong\u003e Loss of prime can overheat the seal faces and damage the seal quickly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAddress drips early:\u003c\/strong\u003e A small leak can lead to motor damage if water reaches the bearings or electrical components.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eO-ring lube note:\u003c\/strong\u003e Use silicone lubricant on housing O-rings\/gaskets only—do not grease mechanical seal faces.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":46797830914223,"sku":"U109-433SS","price":109.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/freshized.com\/products\/pentaircentrifugalpumpshaftsealu109433sspenu109433ss","provider":"Freshized","version":"1.0","type":"link"}