Our 4” Trash pump works to pump sludge from holding tanks into the Polymer Dosing and Injection Unit and into the ADS Dewatering Units. The 4” Trash Pump can pump sludge at a max rate of up to 662 gallons per minute. This flow rate can be slowed down to optimize performance of the polymer injection unit. For more information, give us a call today at 979-245-5656.