Answer
The S valve needs registration when the gap between the disc and the wear plate is greater than 0.25 mm (about 0.010 in), or when the valve blocks repeatedly. A badly registered valve lowers pressure, so flow drops below normal, and can let water leak between the disc and the wear plate during washing. Do this with the machine switched off. Remove the bracket and screw in the register nut to take up the backlash, refit the nut bracket with its bolts, then start the machine at low speed and check the S valve switches properly. Use only original IMER parts.
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Reviewed by our parts specialists from IMER manuals and parts books. Check the part number on your machine or in its parts book before you order. Not sure? Ask a parts specialist.