UNIGRATE™ Adaptor Plate PP2199 is to upgrade the original 6 7/8" wide burn pot to the 5 1/4" wide version recommended for better burn rates by the factory for many years. The aftermarket part number for this Unigrate to match this PP2199 adaptor plate is PP2007

Lennox® 12151264 (this is the factory grate and adapter plate)

Use this adaptor plate to convert the 14 bar, 6-7/8”
wide UltraGrate to the 5-1/4” wide UniGrate

Fits the following:
Whitfield® - Older Advantage® II, II-T & III.