RHEEM High Altitude Kit: Mfr Part # SP21066, For Tank Heaters
The RHEEM High Altitude Kit (Mfr Part # SP21066) is a conversion kit for tank heaters, featuring a 3/16 in connection size. It is compatible with manufacturer part number GNU 100-250, enabling proper operation at…
SKU 3G-OTH-457046
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Product Description
The RHEEM High Altitude Kit (Mfr Part # SP21066) is a conversion kit for tank heaters, featuring a 3/16 in connection size. It is compatible with manufacturer part number GNU 100-250, enabling proper operation at high altitudes.
Frequently Asked Questions
What is the RHEEM High Altitude Kit SP21066 used for?
The RHEEM High Altitude Kit SP21066 is a conversion kit for tank heaters, enabling proper operation at elevations above 2,000 feet. It adjusts the gas-air mixture to prevent incomplete combustion and ensure safe, efficient performance in high-altitude installations.
What are the specifications of the RHEEM High Altitude Kit SP21066?
The RHEEM High Altitude Kit SP21066 is designed for tank heaters with a 3/16 in connection size. It is compatible with manufacturer part number GNU 100-250. The kit includes components to modify the burner for altitudes typically above 2,000 feet.
Where to buy the RHEEM High Altitude Kit SP21066 worldwide?
3G Electric supplies the RHEEM High Altitude Kit SP21066 worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this conversion kit.
How to install the RHEEM High Altitude Kit SP21066?
Installation of the RHEEM High Altitude Kit SP21066 should follow the manufacturer's instructions. Typically, it involves shutting off gas and power, removing the burner assembly, and replacing the orifice with the kit's 3/16 in component. Always consult a qualified technician and local codes.
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3G Electric supplies RHEEM high-altitude conversion kits for water heaters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.


