Specifications include, but are not limited to: 1.1 Capacity and Dimensions
The unit shall have a water tank with capacity of 400 Gallons (U.S.) with the overall dimensions
set according to customer’s specifications. Empty weight shall be approximately 1,100 pounds.
The entire unit shall rest on an aluminum square tubular 2” frame that supports tank and
platform. The frame is constructed so that the tank is fully supported with the areas between the
interior frames not exceeding 540 square inches. The frame shall provide mounting flanges to
truck bed. Frame shall be manufactured by the contractor.
1.3 Water Storage Tank Construction
The tank shall be constructed of ½” thick polypropylene sheet stock. This material shall be noncorrosive stress relieved thermo-plastic, natural black in color and U.V. stabilized for maximum
protection. Materials used shall be compatible with fire fighting foams, retardants and wetting
agents, and meet FDA requirements for potable water. All joints and seams shall be extrusion
double welded and tested for maximum strength and integrity. The transverse baffle partitions
shall be manufactured of ½” stock of the same material and extend from the floor of the tank to
the cover to allow for positive welding and maximum integrity. All partitions shall be equipped
with vent and air holes to permit movement of air and water between compartments. The
partitions shall be designed to provide maximum water flow. All baffle partitions shall interlock
with one another and be welded to each other, as well as to the walls of the tank. Grooves on
tank wall to be cut on a computer numerical controlled machine to ensure baffle stability. Tank
fill connections shall be backed with flow deflectors to diffuse the stream entering the tank. The
end wall of tank shall have a vertical translucent panel sight gauge.
The tank shall have a combination vent and manual fill tower. The fill tower shall be constructed
of ½” polypropylene and shall be a minimum dimension of 8” x 8” outer perimeter. The tower
shall have a ¼” thick, removable polypropylene screen and a polypropylene stainless steel
hinged cover. A combination vent and overflow pipe inside the fill tower, approximately 1½”
down from the top, shall be fastened to a combination vent outflow pipe. The vent overflow shall
be a schedule 80 polypropylene pipe.
Tank shall have internal sump/baffle system of same material and construction. The sump shall
have a minimum 1½” threaded outlet on the bottom for a drain plug. This shall be used as a
combination clean out and drain. The internal piping shall be schedule 80 polypropylene pipe
and all joints will be connected with G.F. electro fusion. The piping will terminate ½” from the
bottom of the sump. The tank shall be equipped with an anti-cavitation device.
The tank in its entirety shall be manufactured by the contractor.
1.4 Diamond Plate Platforms
The entire top of the water tank, and pump mounting platform shall be covered with 3/16”
aluminum diamond plate with broken edges minimum 1”, welded and finished. The pump
platform shall be covered in similar manner, with a minimum 2” broken edge. All components
shall be mounted on the pump platform except the reel, which will be mounted on the top of the
tank. Diamond plate shall be sheared, bent, and welded by the contractor. Diamond Plate
surfaces will have powdercoat finish customer to match vehicle color specifications, commercial
paint is not accepted.
The pump shall be a high pressure centrifugal pump. The pump head shall have 2” NPT intake
and 1.5” NPT discharge. The volute and the body shall be high strength aluminum alloy, hard
coat anodized for corrosion resistance. The impeller shall be of bronze construction. The pump
shall be rated at a minimum 120 GPM at 150 PSI and 25 GPM at 375 PSI, when powered by a
Kubota D902 Diesel: 24 HP, liquid cooled, 12 volt starter, 40 amp. alternator, fuel and oil pump
filters.. Pump to be fitted with automatic shut-off system, actuated by pressure sensing switch
and designed to shut down engine upon loss of water supply, reducing possible pump seal
damage. System shall have provision for manual override.