BYT-7A015 DC 12V Solar Hot Water Heater Circulation Pump with DC Power Supply...
Inlet/Outlet: 1/2" male thead. Fit both 1/2" NPT and BSP female thead. We've tested. w/ two brass coupler. 1/2" Male thread on the pump. The OD of the brass coupler is 10mm. Circulation pump is non-self-priming pump.