Portable filtration units can be very helpful in providing periodic cleaning and flushing of sumps and reservoirs. In many cases, they can be fitted with water removal elements for convenient dehydration of water ingress from normal condensation. Portable filtration units can also be helpful in sampling oil on larger systems (5 gallons +) when it is necessary to force circulate the fluid prior to sampling. These units can also be used for transferring or cleaning fluids prior to dispensing of transfer to their storage containers. This will ensure that top up fluids are at the acceptable cleanliness levels.