Second meters, also known as deduct meters, can be purchased from MATR to subtract usage from the sewage bill for any water used outside that is not entering into the sewer system. The current charge is $185 for the meter. It is the customer's responsibility to hire a plumbing contractor to prepare the "meter set" and properly install the meter. Information is available on the developers page and at our front office. You can call MATR for additional details -- (412) 923-2411.