By Pentair Pool Products
Part # 476370
Pentair ETi250 Conversion Kit, Natural Gas to Liquid Propane for 0 - 2,000 ft. elevations
Note: This orifice kit is intended for heaters fueled by natural gas from the factory to field-convert them to liquid propane.
Propane-fueled heaters should not be installed above 2,000 ft (610 m) elevation.
Refer to High Altitude Install / Propane Conversion Requirements on page 2 of the Owner's Manual to determine whether this kit is compatible with your specific install.