I have a hardy furnace, I think that the domestic hot water side has gotten some sediment in it. The water pressure, only on the hot water in the house is much less than the cold and less that what it has been in the past. I can shut off a valve so I'm not feeding my hot water tank with it and the pressure is like it has been in the past. How can I drain/get the sediment out the the domestic hot water tank on the hardy. It doesn't look like it has a drain spigot and both the intake and exit are at the same height. Could I disconnect both intake and exit and blow it out with compressed air? Thanks Shane