53 Pa. Stat. § 67510
After the amount of the assessment charged upon the several properties has been established by resolution making assessments according to section 2508 or by confirmation of any report of viewers, in whole or in part, the amounts of all assessments are payable to the township treasurer for the use of the sanitary sewer district or districts or the township in which they are assessed. The board of supervisors shall make out bills for the amounts charged against each property, which shall be sent to all property owners whose property will be served by the sanitary sewer system. If the assessment is not paid within ninety days after the mailing of a bill therefor, the board of supervisors shall collect it by action of assumpsit or under law for the filing and recovery of municipal claims.
53 P.S. § 67510