Thresher Septic Service in Big Flats, NY services customers in Chemung and Steuben Counties. We offer services in Excavation Contractors. We specialize in Tanks, Residential, Commercial No Unnecessary Lawn Damage. We are proud to be the only Jet authorized dealer & installer in the area for ATU-Aerobic Treatment Unit. We have been proudly serving the Big Flats, NY area since 1976. When you need your Septic Tank cleaned, repaired or a new one installed call us for the best and latest products.