So SCHMITTY'S PLUMBING HEATING SHEETMETAL, INC. Your Local Plumbing and HVAC Experts 942 11th Ave S, Wahpeton, ND 58075 (701) 642-6574 So SCHMITTY'S PLUMBING HEATING SHEETMETAL , INC . Your Local Plumbing and HVAC Experts 942 11th Ave S , Wahpeton , ND 58075 ( 701 ) 642-6574