The seal under the pre-filter lid for the ESPA Silen new and Silen S models is a precisely dimensioned sealing ring that prevents water leakage and the penetration of air into the suction section of the pump.
Wear of this seal typically manifests itself as water dripping at the lid or a drop in flow caused by air being drawn into the hydraulics.
Replacing the seal is a quick repair that extends the service life of the entire pump and prevents the development of more serious faults caused by air pockets in the suction section.
The part is intended exclusively for the new Silen type (Silen new) and the Silen S model – incompatible with the old SILEN type, for which a different seal is intended.
