The module includes an automatic recycle function: upon flame failure

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

excessive oxidation

Can this be used as an OEM replacement

Construction details including a Buna-N molded diaphragm

Grundfos 00529913 Union Adapter Set R-134A The module includes an automaticThe 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,