LOBIUTIYA 77707-0120 Heater Manifold O-Ring Kit Compatible with MasterTemp 200 250 300 333 400 & Max-E-Therm Pool Heaters, EPDM Rubber Tube Sheet Coil Sealing Manifold O-Ring Replacement Kit

["Compatible Heater Models: 77707-0120 Heater Manifold O-Ring Kit Compatible with MasterTemp 200, 250, 300, 333, and 400 pool heaters and Max-E-Therm heater systems. Replaces heater manifold O-ring kit part number 77707-0120.","Premium EPDM Rubber Material: Made from EPDM rubber, known for its excellent resistance to heat, water, and pool chemicals, making it suitable for pool heater sealing applications.","Reliable Leak Sealing: Designed to seal the connection between the heater manifold, tube sheet, and heat exchanger coil, helping reduce water leaks and restore heater sealing performance.","Ideal for Heater Maintenance: Over time, original seals can crack or lose elasticity. Replacing worn O-rings helps maintain the heater’s internal sealing system and supports stable operation.","Direct Replacement Kit: Designed as a replacement for 77707-0120 manifold O-ring kit, suitable for pool heater maintenance, repair, and routine servicing.","Quick Installation: Installation is straightforward—remove the manifold, open the cover, take out the old O-rings, and replace them with the new seals. A practical solution for DIY maintenance, pool service technicians, residential pools, and spa systems."]