This guard is designed for 24-inch discharge openings on specific York-brand family units

the external housing being too hot to touch

As a heavy-duty HFE 4 PN6 100/225 configuration

This natural gas pilot assembly is functionally identical to the Honeywell Q3451B1103

Construction details including a Buna-N molded diaphragm

Grundfos 00529913 Union Adapter Set R-134A This guard is designed forThe Grundfos 00529913 Union Adapter Set is a professional grade 1 2" sweat connection kit engineered for high performance fluid handling. Constructed from heavy duty bronze, this pump union set provides superior corrosion resistance, making it an ideal choice for residential hot water recirculation systems and open loop heating applications. This genuine Grundfos replacement part is specifically designed for UP and UPS series circulator pumps,