The sellers stated that they had the septic pumped in spring 2012 and frequency of pumping was every 2 years (this is what they wrote on disclosure statement). We closed in August 2012 and by September there were and have since been problems. Our neighbor told us that when the dye test was done the owners ran the water down the driveway and not into the septic. The 1st septic company we had here had just so happened to be here in 2009 for the sellers and had informed them that their system was in rough shape and overtaken by roots and needed to be pumped. This company wrote up a sheet for us stating our system had not been pumped in several years. I spoke to the man from the health dept who did the test and the sellers told him they had not pumped in 7 years. They lied can we sue?