Product information: "BADU® Mat R 41/3 A"
Sand filters must be periodically backwashed in order to loosen up the sand and to eliminate filtered dirt through the waste system. This requires, among other things, the hydraulic current of the filter circulation pump to be reversed through the filter housing.
These functions as well as others can be adjusted easily and effortlessly with the BADU Mat.
Note: The seal is in the upper part of the valve. This makes it easier to replace if it becomes worn.