Textile mills have been operating the waste recovery system (WRS) to suck the waste from the cards, combers and blow room after matching the collective specs of waste suction flow and Pascal pressure requirements to the WRS. After a few years, the parameters are altered due to change of equipment, variations in cotton, changing quality needs suiting to market. Here, we have to keep the energy saving option always open, routinely during the above. Though the WRS OEM has given the Pascal gauge at the filter box, and at the individual cards, the mill has to maintain the optimum Pascal suction at each of the card.