Sales of most homes in the Town of Amherst will soon require an inspection of the drainage system for compliance with the local sewer use law.

The Town Board on Monday approved several amendments to the law, including one requiring the town Engineering Department to inspect homes built prior to 1975 at the time of a sale.

The purpose is to eliminate the discharge of stormwater from private drains into the town’s sanitary sewer system, which can become overburdened during heavy rain. Other towns, such as Cheektowaga and Tonawanda, have similar laws.

The inspection includes the sump pump system, interior floor drains, footing drains, yard drains, roof drains and downspouts, catch basins and parking lot drains. If the home fails the inspection, a notice of violation will be issued to the owner describing prohibited discharges and recommended remedies.

The new requirement takes effect in October 31.