Restore a watertight seal on your Jandy/Zodiac pump with the Aladdin O_521 Seal Plate O_Ring, the direct aftermarket equivalent of Jandy part R0446300. This precision-molded elastomer ring seats between the pump housing and the backplate (seal plate), preserving proper suction and discharge pressure across a wide range of Jandy pump families including Stealth (SHPF/SHPM), PlusHP (PHPF/PHPM), FloPro, Water Feature (WFTR), Waterfall (SWF), MaxHP (MHPM), and ePump models. With an approximate 9.5_ inner diameter and 3/16_ cross-section, the O_521 matches OEM dimensions and delivers outstanding resistance to pool chemicals and elevated water temperatures. A fundamental component for pump rebuilds, leak corrections, or periodic maintenance, this seal is also found in professional-grade service kits for thorough system restoration.

Key Benefits

• Exact Match for Jandy R0446300: Engineered to OEM dimensional standards for guaranteed compatibility with Stealth, PlusHP, FloPro, ePump, MaxHP, Waterfall, and Water Feature pump lines.
• Watertight Seal Plate Connection: Forms a dependable barrier between the pump body and seal plate, preserving system pressure and eliminating water loss.
• Tough, Chemical-Proof Material: Manufactured from resilient elastomer stock that resists breakdown from sanitizers, pool chemicals, and elevated operating temperatures.
• Essential for Service and Rebuilds: A critical part for leak troubleshooting, scheduled maintenance, or complete pump overhauls, and frequently bundled in professional rebuild packages.
• Precision-Sized for Lasting Fit: Approximately 9.5_ inner diameter with a 3/16_ cross-section provides a snug, secure seat that maintains its integrity over extended operation.

What's Included

• Aladdin O-521 O-Ring

Compatibility

• Jandy Waterfeature WFTR Pumps
• Jandy Stealth SHPF SHPM Pumps
• Jandy PlusHP PHPF PHPM Pumps
• Jandy ePump JEP Pumps
• Jandy Waterfall SWF Pumps
• Jandy MaxHP MHPM Pumps

Specifications

• Brand: Aladdin
• Part Number: O-521

SEO Tags

aladdin o-521
O-521
o-521 aladdin seal plate o-ring