Steve FindlayFindlay Marine LtdGMT 07:44
20th Mar 2008
IP: x.x.193.200 Dr. Vis is correct of course, and a correctly configured and set up purifier(s) should remove most of the water. However, prior to reaching the purifier stage, the water should gravitate to the base of the settling tank and can then be drained by ship's staff during routine watchkeeping practises.
Any 'carry over' of water to the service tank, after passing through the settling tank and purifier(s), can similarly be removed via the drains.
The earlier ISO8217:1996 standard allowed for 1% water, so the level of water that you are experiencing (0.7% to 0.8%) is certainly not excessive.