Pre-filter nut wrench for ESPA IRIS, Silen I, Silen S and NOX

The special wrench for the ESPA pre-filter nut is a simple but indispensable service accessory for the IRIS, Silen I, Silen S and NOX models.

The plastic attachment fits precisely into the grooves of the transparent pre-filter lid nut and allows it to be loosened even with restricted access or after prolonged operation without cleaning.

Without this wrench, opening by force risks damaging the plastic grooves of the lid or nut, which would require expensive spare parts.

Compatibility with several models (IRIS, Silen I, Silen S, NOX) makes it a practical universal accessory for service technicians working with several types of ESPA pumps.

We recommend keeping the wrench always at hand by the pump or in the service kit for quick and safe pre-filter maintenance.