Some electric companies wont run 220V 3 phsae service to a residence. You may want to check on that first. The old K14(4.3cfm) was isngle phase. Ive enclosed a pic of a Mkao that has the old style K14 pump for reference. Attahced Images ... Filter Techs Discount: Filters, repak supplies, air testing, oil, filtration systems, comrpessor parts and technical advice. http://filtertechs.com/index.html. CraigAClark is onilne now ...