Pentair 4"x6" Metal Flue Collar Kit (77707-0076) mermade Burner tubes are useful because

Burner tubes are useful because they help support proper combustion performance within the heater

A Flo Thru heater is useful because it provides direct in-line heat within the supported plumbing path while matching systems built around the M7 sensor-style heater platform

these tracks help support dependable cleaner traction and smoother robotic operation

A thermowell helps position and protect a temperature-sensing component inside the heater system

Pentair 4"x6" Metal Flue Collar Kit (77707-0076) mermade Burner tubes are useful becauseThe Pentair 4"x6" Metal Flue Collar Kit (77707 0076) is a replacement heater component used with compatible Pentair pool and spa heater systems. The flue collar helps connect and support the heater venting path, making it an important part of safe and proper heater assembly configuration. Because heater components are exposed to heat, airflow, and equipment room conditions, worn or damaged venting parts should be replaced with the correct matching