Pentair MasterTemp 400/Max-E-Therm 400 Natural Gas Blower Kit (77707-0253) electrical CMP Pro-Seal on and off

CMP Pro-Seal on and off valve

Matching the correct self-sealing threaded-to-slip design helps preserve intended fit and dependable operation

For pools using a 5-port setup with 1-1/2" compatibility requirements

which makes it especially practical when the goal is a more polished visible finish

Pentair MasterTemp 400/Max-E-Therm 400 Natural Gas Blower Kit (77707-0253) electrical CMP Pro-Seal on and offKeep the repair centered on the right component with this MasterTemp 400 Max E Therm 400 Natural Gas Blower Kit. It is made for the combustion air system on compatible heater models, helping restore dependable airflow for ignition and burner performance. A worn or failing blower can cause startup issues, fault codes, poor heat output, or inconsistent firing, so replacing it with the correct kit is an important repair step. For best results, confirm