Pentair ETi 250 High Altitude Conversion Kit 4,500–10,000 Ft | 462057

The Pentair ETi 250 High Altitude Conversion Kit (462057) is a specialized accessory designed for the Pentair ETi 250 Condensing Gas Heater. This kit adjusts the combustion settings so the heater can operate safely and efficiently at high elevations between approximately 4,500 ft and 10,000 ft above sea level. At higher altitudes, thinner air affects combustion and burner performance, and this conversion kit helps ensure proper fuel delivery and combustion stability under those conditions.

What This Part Is For

This conversion kit is intended for use with the Pentair ETi 250 Condensing Gas Heater when the installation site is located at high elevation (generally above 4,500 feet). It includes the necessary orifices and components to optimize combustion for the reduced oxygen levels found at altitude, ensuring the heater meets performance and safety requirements when operating on natural gas (NG) or propane (LP) in thinner air.

Features & Benefits

• High altitude conversion kit for ETi 250 heaters operating between ~4,500 and 10,000 ft
• Includes orifices and parts engineered for proper combustion adjustments
• Designed to maintain heater efficiency and stable flame characteristics at elevation
• Meets manufacturer specifications for high altitude operation

Installation Notes

• High altitude conversion should be performed by a qualified technician or licensed gas professional
• Follow the Pentair ETi 250 installation and service manual for safe adjustment procedures
• Verify all gas and burner connections are secure and leak-free before testing
• Check combustion performance and safety systems after conversion to confirm proper function

Maintenance Tips

• Inspect conversion components and burner orifices periodically for wear or debris buildup
• Service the heater seasonally to maintain efficient performance at altitude
• Confirm proper flame characteristics after heavy use or fuel type changes

Related Products

• Pentair ETi 250 Condensing Gas Heater – The main heater model this high altitude kit supports.
• Pentair ETi 250 Propane Conversion Kit (476370) – Kit to convert the ETi 250 between natural gas and propane fuel.
• Pentair ETi 250 Indoor Direct Air Intake Kit (476371) – Accessory for indoor combustion air supply.
• Pentair ETi 250 Condensate Neutralizer Replacement Kit (476375Z) – Neutralizer service kit for condensate treatment.