Service in functional layers
Prepare removed tank water, towels and an ordered parts area. Remove vessel sludge, rinse foam and swish biomedia only when coated.
Clean impeller and well without forcing the shaft. Use only manufacturer-compatible seal lubricant.
Controlled recommissioning
Seat baskets and gasket without pinching, open taps and purge air by instructions.
Check sound, flow and connections immediately and later; log the date.