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

the external housing being too hot to touch

excessive oxidation

The module includes an automatic recycle function: upon flame failure

Can this be used as an OEM replacement

Grundfos 00529913 Union Adapter Set R-134A This natural gas pilot assemblyThe 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,