Patent ID: 7261127
Filing Date: 2007-08-28
Classification: B01D,F16K,Y10T

Abstract:
1. A method of operating a filtering system including a pump and a filter with an inlet and an outlet, the method comprising the steps of; providing a valve assembly including a valve body and a plurality of plunger heads positionable within the valve body; positioning pairs of the plurality of plunger heads within the valve body to provide a plurality of modes of operation, the pairs of plunger heads being positioned within the valve body in one of a filtering mode, a backwash mode, and a direct mode in which flow from the pump is directly into the waste-water disposal outlet; and the step of providing the plurality of plunger heads includes providing a first plunger with a first pair of plunger heads thereon, the first plunger being movable between the filtering and the backwash modes of operation, and providing a second plunger with a second pair of plunger heads thereon positioned in the direct mode of operation, and the step of positioning includes positioning the first plunger in the valve body for movement between the filtering and the backwash modes of operation and replacing the first plunger with the second plunger to provide the direct mode of operation.