Seal every tubesheet connection on your 400-series heater with the Pentair Coil Tubesheet Sealing O-Ring Kit (77707-0119), designed for MasterTemp and Max-E-Therm 400 heaters. Packaged as a generous 12-pack, these precision-cut O-rings provide comprehensive sealing across all tubesheet points, blocking leaks and maintaining proper system pressure. Each seal is formed from advanced elastomeric material that stays flexible and resilient through extreme temperature swings and continuous chemical exposure. Installation takes just minutes, making this kit an indispensable part of any heater maintenance schedule.

Key Benefits

• Designed for 400 Heaters: Precision-cut to the exact specifications of MasterTemp and Max-E-Therm 400 heater tubesheets, ensuring total sealing accuracy at every connection point.
• Generous 12-Pack Supply: Provides 12 O-rings for comprehensive tubesheet coverage, so every seal point is protected against moisture intrusion.
• Maintained System Pressure: Blocks leaks at the tubesheet to preserve internal pressure, allowing your heater to operate at its designed thermal efficiency.
• Advanced Elastomeric Material: Stays flexible and resilient through extreme temperature changes and ongoing exposure to treated pool water chemistry.
• Minutes-Long Installation: Fits into place quickly during routine service calls, making tubesheet seal replacement one of the fastest maintenance tasks you can perform.

What's Included

• Pentair 77707-0119 Tube Sheet Coil Sealing O-Rings

Compatibility

• Pentair MasterTemp Heaters Models: 400NA, 400-LP
• Pentair Sta-Rite Max-E-Therm Heater Model: 400

Specifications

• Brand: Pentair
• Part Number: 77707-0119

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77707-0119
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