{"product_id":"u-s-seal-ps-3960-buna-carbon-pump-shaft-seal-spx2700sa","title":"U.S. Seal PS-3960 Buna\/Carbon Pump Shaft Seal | SPX2700SA","description":"\u003cp data-start=\"339\" data-end=\"1173\"\u003eThe U.S. Seal Mfg. PS-3960 Pump Shaft Seal is a 5\/8 Inch Buna and carbon mechanical seal designed as a direct replacement for the Hayward SPX2700SA shaft seal used in MaxFlo II, MaxFlo XL, MaxFlo VS, and compatible booster pump models. This seal features a carbon rotating face paired with a ceramic stationary seat to help maintain a consistent seal around the pump shaft and prevent water leakage into the motor. The Buna elastomer provides flexibility and chemical resistance, supporting reliable sealing performance in pool and spa environments. While commonly used in spa and lower-pressure applications, the PS-3960 performs effectively when installed within proper pump tolerances. Replacing a worn shaft seal helps protect the pump motor, preserve wet-end integrity, and reduce leak-related failures.\u003c\/p\u003e\n\u003ch3 data-start=\"1175\" data-end=\"1189\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-start=\"1190\" data-end=\"1889\"\u003e\n\u003cli data-start=\"1190\" data-end=\"1343\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1343\"\u003e\u003cstrong data-start=\"1192\" data-end=\"1229\"\u003eDirect Replacement for SPX2700SA:\u003c\/strong\u003e Designed to match the size and function of the Hayward SPX2700SA mechanical seal for proper interchangeability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1344\" data-end=\"1495\"\u003e\n\u003cp data-start=\"1346\" data-end=\"1495\"\u003e\u003cstrong data-start=\"1346\" data-end=\"1383\"\u003eCarbon and Ceramic Sealing Faces:\u003c\/strong\u003e Carbon rotating surface works against a hard ceramic seat to maintain a smooth, stable seal during operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1496\" data-end=\"1626\"\u003e\n\u003cp data-start=\"1498\" data-end=\"1626\"\u003e\u003cstrong data-start=\"1498\" data-end=\"1530\"\u003eBuna Elastomer Construction:\u003c\/strong\u003e Flexible Buna rubber helps accommodate movement while resisting pool and spa water chemistry.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1627\" data-end=\"1753\"\u003e\n\u003cp data-start=\"1629\" data-end=\"1753\"\u003e\u003cstrong data-start=\"1629\" data-end=\"1659\"\u003eLeak Prevention Component:\u003c\/strong\u003e Seals the pump shaft opening to reduce water intrusion that can damage bearings and motors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1754\" data-end=\"1889\"\u003e\n\u003cp data-start=\"1756\" data-end=\"1889\"\u003e\u003cstrong data-start=\"1756\" data-end=\"1790\"\u003eService-Friendly Installation:\u003c\/strong\u003e Straightforward mechanical seal replacement supports routine pump maintenance and wet-end repairs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHayward MaxFlo II Pumps\u003c\/li\u003e\n\u003cli\u003eHayward MaxFlo XL Pumps\u003c\/li\u003e\n\u003cli\u003eHayward MaxFlo VS Pumps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e \u003c\/span\u003e\u003cspan\u003eThis part may be compatible with your system, please refer to your owners manual to ensure compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"3906\" data-end=\"3925\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"3927\" data-end=\"4223\"\u003eThe U.S. Seal Mfg. PS-3960 Shaft Seal is a mechanical pump seal used to prevent leaks along the motor shaft in compatible Hayward pumps. This FAQ addresses compatibility, installation planning, and service-related questions. It is intended to help confirm correct usage before replacing the seal.\u003c\/p\u003e\n\u003ch2 data-start=\"4225\" data-end=\"4256\"\u003eCompatibility and System Fit\u003c\/h2\u003e\n\u003cp data-start=\"4258\" data-end=\"4393\"\u003eMechanical shaft seals must match the pump shaft size and wet-end design exactly. The PS-3960 is designed for specific Hayward systems.\u003c\/p\u003e\n\u003ch4 data-start=\"4395\" data-end=\"4448\"\u003eWhich pump platforms use the PS-3960 shaft seal?\u003c\/h4\u003e\n\u003cp data-start=\"4449\" data-end=\"4700\"\u003eThe PS-3960 replaces the Hayward SPX2700SA seal found in MaxFlo II, MaxFlo XL, MaxFlo VS, and select booster pumps. These platforms use a 5\/8 inch shaft seal design. Local service professionals often replace this seal when addressing motor-side leaks.\u003c\/p\u003e\n\u003ch4 data-start=\"4702\" data-end=\"4761\"\u003eIs the PS-3960 suitable for older MaxFlo pump designs?\u003c\/h4\u003e\n\u003cp data-start=\"4762\" data-end=\"4970\"\u003eCompatibility depends on whether the pump uses the SPX2700SA-style seal. Pump age alone does not determine fitment. Before calling your nearest location, confirming the pump model helps determine suitability.\u003c\/p\u003e\n\u003ch4 data-start=\"4972\" data-end=\"5028\"\u003eCan the PS-3960 be used with aftermarket impellers?\u003c\/h4\u003e\n\u003cp data-start=\"5029\" data-end=\"5209\"\u003eYes, as long as the impeller and seal cavity dimensions match the original design. Proper alignment is critical for sealing. Checking nearby shop stock helps with service planning.\u003c\/p\u003e\n\u003ch2 data-start=\"5211\" data-end=\"5247\"\u003eInstallation and Service Planning\u003c\/h2\u003e\n\u003cp data-start=\"5249\" data-end=\"5369\"\u003eReplacing the shaft seal helps prevent ongoing leaks and motor damage. Planning the service avoids unnecessary downtime.\u003c\/p\u003e\n\u003ch4 data-start=\"5371\" data-end=\"5422\"\u003eHow long does it take to replace a shaft seal?\u003c\/h4\u003e\n\u003cp data-start=\"5423\" data-end=\"5623\"\u003eSeal replacement typically occurs during a standard wet-end service. Time depends on access and condition of fasteners. Local service professionals often inspect bearings and gaskets at the same time.\u003c\/p\u003e\n\u003ch4 data-start=\"5625\" data-end=\"5687\"\u003eDoes the PS-3960 handle normal pool operating conditions?\u003c\/h4\u003e\n\u003cp data-start=\"5688\" data-end=\"5913\"\u003eThe PS-3960 is built with Buna elastomer and carbon sealing surfaces suitable for many pool and spa environments. It performs best in lower-pressure applications. Compare pricing across stores when planning maintenance parts.\u003c\/p\u003e\n\u003ch4 data-start=\"5915\" data-end=\"5969\"\u003eShould the pump be tested after seal replacement?\u003c\/h4\u003e\n\u003cp data-start=\"5970\" data-end=\"6140\"\u003eYes, running the pump briefly after reassembly allows inspection for leaks. Observing the seal area confirms proper installation. This helps prevent repeat service calls.\u003c\/p\u003e\n\u003ch2 data-start=\"6142\" data-end=\"6175\"\u003eLocal Pricing and Availability\u003c\/h2\u003e\n\u003cp data-start=\"6177\" data-end=\"6276\"\u003eKnowing availability helps coordinate repairs efficiently. Local access supports faster turnaround.\u003c\/p\u003e\n\u003ch4 data-start=\"6278\" data-end=\"6331\"\u003eIs the PS-3960 available from nearby shop stock?\u003c\/h4\u003e\n\u003cp data-start=\"6332\" data-end=\"6514\"\u003eAvailability varies by location, so checking nearby shop stock before scheduling service is recommended. Having the part number ready speeds up confirmation. This helps avoid delays.\u003c\/p\u003e\n\u003ch4 data-start=\"6516\" data-end=\"6571\"\u003eDo service professionals commonly stock this seal?\u003c\/h4\u003e\n\u003cp data-start=\"6572\" data-end=\"6747\"\u003eMany local service professionals keep common MaxFlo shaft seals on hand due to frequent wear. The PS-3960 is widely used. Checking local pricing helps with inventory planning.\u003c\/p\u003e\n\u003ch4 data-start=\"6749\" data-end=\"6815\"\u003eCan staff help confirm the correct shaft seal before service?\u003c\/h4\u003e\n\u003cp data-start=\"6816\" data-end=\"6982\"\u003eYes, staff can review pump model details and seal specifications. Before calling your nearest location, having photos or the old seal available helps ensure accuracy.\u003c\/p\u003e","brand":"U.S Seal MFG.","offers":[{"title":"Default Title","offer_id":54614790832419,"sku":"PS-3960","price":9.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/wholesalepoolmart.com\/products\/u-s-seal-ps-3960-buna-carbon-pump-shaft-seal-spx2700sa","provider":"Wholesale Pool Mart","version":"1.0","type":"link"}