{"product_id":"aladdin-o-521","title":"Aladdin O-521 Jandy Pump Seal Plate O-Ring | R0446300","description":"\u003ch2\u003eKey Benefits + Jandy Pump Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAladdin O-521 replacement seal plate\/backplate O-ring for specific Jandy pool pump applications.\u003c\/li\u003e\n\u003cli\u003eCross-referenced by Aladdin to Jandy part number R0446300.\u003c\/li\u003e\n\u003cli\u003eVerified in Aladdin repair kits for Jandy Stealth SHPF\/SHPM and PlusHP PHPF\/PHPM pumps.\u003c\/li\u003e\n\u003cli\u003eAladdin also lists O-521 as a cross-reference for Jandy R0480400 on VS FloPro diffuser\/backplate applications.\u003c\/li\u003e\n\u003cli\u003eSeals the pump backplate or seal plate connection where the specified O-ring is used.\u003c\/li\u003e\n\u003cli\u003eConfirm the pump model and original Jandy part number before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuick Product Summary\u003c\/h2\u003e\u003cp\u003eThe Aladdin O-521 is a replacement seal plate\/backplate O-ring for select Jandy pool pumps. Aladdin cross-references O-521 to Jandy R0446300 and includes it in repair kits for Stealth SHPF\/SHPM and PlusHP PHPF\/PHPM pumps. Aladdin's catalog also lists O-521 for Jandy R0480400 on VS FloPro diffuser\/backplate applications. Choose this replacement when your pump specifically calls for O-521, R0446300 or the documented R0480400 application, and verify the exact pump model before purchase.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eServicing the seal plate\/backplate connection on supported Jandy pumps\u003c\/li\u003e\n\u003cli\u003eReplacing the O-521 included in compatible Aladdin Jandy pump repair kits\u003c\/li\u003e\n\u003cli\u003eMatching Jandy R0446300 or documented R0480400 applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy This Matters\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThe seal plate O-ring helps seal the connection between major pump housing components.\u003c\/li\u003e\n\u003cli\u003eA worn or damaged O-ring can allow water to escape from the applicable joint.\u003c\/li\u003e\n\u003cli\u003eMatching the documented replacement number helps reduce wrong-part orders.\u003c\/li\u003e\n\u003cli\u003eReplacing the seal during pump service helps restore the intended sealing surface without relying on excessive tightening.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Signs You Need This \/ Use This When\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThe existing seal plate\/backplate O-ring is cracked, flattened, stretched or missing.\u003c\/li\u003e\n\u003cli\u003eYou are rebuilding a supported Jandy pump and the repair kit identifies O-521 as the seal plate O-ring.\u003c\/li\u003e\n\u003cli\u003eYour original part is identified as Jandy R0446300.\u003c\/li\u003e\n\u003cli\u003eYou are servicing a VS FloPro application that calls for Jandy R0480400 and have confirmed the model.\u003c\/li\u003e\n\u003cli\u003eWater is appearing at the applicable backplate or seal plate connection and the sealing surfaces have been inspected.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAladdin Equipment Company\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePool pump seal plate \/ backplate O-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eO-521\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eO-521-0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e601402268489\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Cross-Reference\u003c\/td\u003e\n\u003ctd\u003eJandy R0446300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional Documented Cross-Reference\u003c\/td\u003e\n\u003ctd\u003eJandy R0480400 for VS FloPro diffuser\/backplate application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVerified Pump Families\u003c\/td\u003e\n\u003ctd\u003eJandy Stealth SHPF\/SHPM, PlusHP PHPF\/PHPM, and documented FloPro applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eSeal plate \/ backplate sealing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eCompatibility \/ Fitment Notes\u003c\/h2\u003e\u003cp\u003eAladdin identifies O-521 as the Jandy R0446300 SHPF\/SHPM Stealth pump backplate O-ring and includes O-521 as the seal plate O-ring in its Stealth and PlusHP pump repair kits. Aladdin also lists O-521 against Jandy R0480400 for a VS FloPro diffuser\/backplate application. Because Jandy pump families and revisions can use different seals, match the pump model and original part number before ordering rather than relying on appearance alone.\u003c\/p\u003e\u003ch2\u003eInstallation \/ Use Notes\u003c\/h2\u003e\u003cp\u003eDisconnect power and follow the pump manufacturer's service instructions before opening the pump. Remove the old O-ring, clean and inspect the groove and mating surfaces, and install the replacement without twisting or pinching it. Use only a lubricant suitable for pool and spa O-rings when appropriate, and follow the equipment manufacturer's instructions for reassembly and startup.\u003c\/p\u003e\u003ch2\u003eBuy with Confidence\u003c\/h2\u003e\u003cp\u003eBenchmark Pool Supply helps customers identify replacement pool pump parts by manufacturer, model and part number. For O-521, compare your original Jandy part number and pump series before ordering so you can select the correct seal for the repair.\u003c\/p\u003e","brand":"Aladdin Equipment Company Inc","offers":[{"title":"Default Title","offer_id":43101108928586,"sku":"O-521-0","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/6580\/7178\/files\/O-521-0__62221.webp?v=1787672833","url":"https:\/\/benchmarkpoolsupply.com\/products\/aladdin-o-521","provider":"Benchmark Pool Supply","version":"1.0","type":"link"}