HD Series (Heavy Duty) Cupro-Nickel Tube Sheet Coil (Heat Exchanger) for the following Heaters:
- Pentair MasterTemp 250,000 BTU Heaters (Manufactured Before January 12, 2009)
- Coil / Tubesheet Sealing O'ring Kit.
- Insulation Kit (77707-0008).
- Ignitor (77707-0054).
- Blower Adapter Plate and Gasket Kit (77707-0011).
- The HD Series Cupro-Nickel heat exchanger can be used as a replacement heat exchanger for the standard MasterTemp 250 Natural Gas or Propane heaters.