Pentair Drain Cap/Thermal Regulator O-Ring - For Filters & Heaters

Pentair Drain Cap & Thermal Regulator O-Ring – SKU U9-371 (Formerly 35505-1313) is a genuine Pentair replacement sealing gasket designed for select sand filters and pool heaters. This durable O-ring helps create a tight, leak-resistant seal at drain caps and thermal regulator caps, maintaining proper system pressure and performance. Ideal for routine maintenance or replacing worn seals, it ensures dependable operation across compatible Pentair and Sta-Rite equipment.

✅ Key Features

• Genuine Pentair Replacement Part: OEM-quality O-ring designed for precise fit and reliable sealing.
• Multi-Application Seal: Used for sand filter drain caps and heater thermal regulator caps.
• Leak-Resistant Performance: Helps maintain proper pressure and prevent water loss.
• Durable Gasket Construction: Suitable for pool and spa equipment sealing applications.
• Direct Replacement Fit: Installs easily in compatible Pentair and Sta-Rite systems.

⚙️ Specifications

• SKU: U9-371 (formerly 35505-1313)
• Brand: Pentair
• Application: Drain Cap & Thermal Regulator Cap Seal
• Compatibility:
  • Sand Filters:
    • Pentair Waterford Systems Sand Filter, Cristal-Flo T-BP Series High Rate Sand Filter
  • Pentair MasterTemp Heaters:
    • 460792, 460793, 460730, 460731, 460732, 460733, 460734, 460735, 460736, 460737, 460805, 460806
  • Sta-Rite Max-E-Therm Heaters:
    • SR200NA, SR200HD, SR200LP, SR333NA, SR333HD, SR333LP, SR400NA, SR400HD, SR400LP