Grundfos 519604 Cast Iron Flange Set for UP Series Circulator Pumps-1-1/2 NPT, Black - Sump Pump Accessories - Amazon.com
Amazon.com: Grundfos JP15S-CI Cast Iron Shallow Well Jet Pump, 1.5 HP, 230V : Everything Else
Grundfos RCP18 (UP15-29SUC/TLC) (59896777) Pump, Circulator 115V 1/2 HP Union Connection Ready w/Timer: Portable Power Water Pumps: Amazon.com: Tools & Home Improvement