The seal under the pre-filter lid is a rubber ring or profile that prevents water leakage and air intake at the screw-on pre-filter lid of the ESPA NIPER pump.
A damaged seal causes a loss of negative pressure in the suction circuit, which manifests itself as a drop in flow and surging operation of the pump.
Regular replacement of the seal during the annual service inspection of the pump is a simple preventive measure that avoids more costly repairs.
The original dimensions of the seal guarantee a precise seating under the NIPER pre-filter lid without the need for any modifications.
