Grundfos 1/2" Union Set Bronze IV (For SU)
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Q:Will this union set work with the Grundfos UP10-16BU/ATLC recirculation pump?
A:No, Unfortunately this union set will not work with the Grundfos UP10-16BU/ATLC recirculation pump. This pump has a 1 1/4" male NPT (NPSM union) thread on the pump and this union set would not fit.
A:I have both the pump and union set referred to in the question, and the union set works fine with this pump.