Skid Unit The water tank, pump and plumbing shall be mounted on a heavy duty aluminum frame to allow for the unit to be removed as a single unit. Polypropylene Water Tank: A 300 gallon water tank shall be supplied and shall have a 4" overflow. The construction shall be of co-polymer polypropylene and shall be rectangular shaped. No Fiberglass! No Exception! The tank body and end bulkheads shall be constructed of 0.5" thick, polypropylene tested inside and out. The transverse and longitudinal swash partitions shall be interlocked and welded to each other as well as to the walls of the tank. The partitions shall be designed and equipped with vent holes to permit air and liquid movement between compartments. The 0.5" thick cover shall be recessed .375" from the top of the side walls. Hold down dowels shall extend through and be welded to both the covers and the transverse partitions, providing rigidity during filling operations. Drilled pegs for lifting eyes shall be provided in the top area of the water tank. The water fill tower shall be 0.5" thick polypropylene stock with a hinged lid and a removable polypropylene screen. The water fill tower shall be located on the rear driver's side of the water tank. A sight glass shall be supplied on the rear driver's side corner of the water tank, so the operator can see the lifeline of water remaining during pumping operations from pump panel. Two (2) tank mounting tabs shall be provided. One shall be at the front and one at the rear to allow the tank to be fastened to the aluminum skid frame utilizing heavy duty grade 8 bolts.. The water tank shall have an over flow tube. The overflow tube shall exit the passenger side tank body, offset rearward.