Grinder Pump Information

Properties on the low pressure portion of the sewer system will require a grinder pump unit. In addition, grinder pumps may also be needed for some properties which, due to their elevation, will have to pump to the Town's gravity sewer system.

The Town engaged in a competitive bid process in order to procure high quality, standardized pump systems with a five-year warranty. Environment One Corporation (E/One) was the successful bidder in that process. The Town will provide one E/One grinder pump unit to each single-family residential property that requires a grinder pump, at no charge. The property owner will own the pump unit and will be responsible for its’ installation. 

Owners of non-residential properties and of multi-family residential properties will need to work with an engineering firm to design a connection plan for their property; pumps needed for these connections will not be provided by the Town.

The Board of Selectmen approved a Grinder Pump Policy (PDF) on May 16, 2016.

Each property owner should coordinate with their plumber regarding grinder pump installation. Training for plumbers and contractors on grinder pump installation was held twice in 2016 and is being held again on Friday April 28, 2017 from 8 am to 12 pm at the Herman Room at the Falmouth Main Library. The Town of Falmouth strongly recommends that property owners contract with plumbers that have attended the E/One installer training, but the Town cannot certify or approve plumbers or contractors (Grinder Pump Training Session Attendance (PDF)).

When the property owner’s representative picks up the grinder pump, they will need to provide a form signed by the property owner, agreeing to transfer of pump unit ownership from the Town to the property owner and to a right of entry for the Town or its agent to enter onto the property to service the pump.

Types of Grinder Pumps


There are 3 types of grinder pumps that will be available from the Town for the LPSSA: outdoor grinder pump, flood zone outdoor grinder pump and indoor grinder pump.

Outdoor Grinder Pump


This unit has an automatic internal vent system housed within the cover. This unit is intended for installations where the pump system cover will not be subject to flood conditions.

Flood Zone Outdoor Grinder Pump


This unit is exactly the same as the standard Outdoor Unit except that is has a flood proof cover and is provided with an orifice for connecting an external PVC vent pipe. The flood zone unit is intended for installations where the pump system cover may be subject to flood conditions.
  • Map Showing Low Pressure Parcels Located in the Flood Zone (PDF): This map shows in bold outline the low pressure properties which are located at least in part in the AE flood zone (flood zone shown in bright blue). If the grinder pump is to be located within the AE flood zone, then a flood zone pump unit must be specified. If the pump is to be outside the AE flood zone, then it is up to the property owner and their plumber whether or not to specify a flood zone pump unit. Some properties are only partially in the flood zone; if the pump can be located outside the AE zone footprint, then it will not required to be a flood zone pump.
  • Flood Zone Outdoor Grinder Pump Detail Sheet (PDF): The flood zone outdoor unit is exactly the same as the standard outdoor unit except that it is has a flood proof cover and is provided with an orifice for connecting an external PVC vent pipe, as shown on the attached detail sheet. The user instructions are the same for the flood zone outdoor unit as for the standard outdoor unit.

Indoor Grinder Pump


It is recommended that this unit be considered only when installation of one of the other two pump unit types is not feasible. It is not advised that these pumps be installed in a finished basement. If maintenance is needed on an indoor grinder pump unit, the service person will need access to the basement and the maintenance will be performed in the home's basement.

Other Information Pertinent to the Grinder Pumps