All my Haas machines have 230V single phase coolant pumps. If you do not already have the socket installed on the machine they are available from Haas along with a wiring harness. The high flow coolant pumps from Haas have worked fine for me. The part that fails most often is the starting switch in the motor but these last for about a million starts and are easy to replace. I have never had any problems with the pump head.