Maintenance day

All the working chairs would be maintained today especially on water gallery inside with replacing water pressure control valves promptly. Calcium hypochlorite crystal has been formed in narrow pin like ways in the machinery for long period of time. Re-acquisition of the water ways are indispensable for normal operation of the machinery as designed. Clogged pin holes would be treated by some adequate fine files  for our profession, because the diameter of the orifice is very important for pressure controlling valve.