I went thru the haulmark factory in early october and the new units that I saw had tanks that were mounted ahead of the rear axle, above the truck frame and below the floor structure, about 24 '' wide,4 to 8'' deep with a 24'' deep sump on the road side, IIRC they are 65 or 70 gal each, with a spiffy manifold and drain system all mounted in in the cabinet. potable water was either 150 or 200 gal under the master bed depending on center or side mount.
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