polypropylene water tank

Our Tanks

   POLYPROPYLENE TANKS

Pla-Mac, Inc.'s tanks range in size from 5-gallon foam to 4,000-gallon skid or "T" tanks. All are built to meet NFPA standards. They are fabricated from 1/2" or 3/4" UV stabilized polypropylene in black or white.


Ordering a tank is easy. You may call, e-mail or fax dimensions and fitting locations, etc. or send us a hand drawing of what you want and we will make a CAD drawing and send it back for your review.


You may make changes to the drawing and when it is the way you want, just let us know and we will build it.


2,000 gallon and larger tanks are constructed from 3/4" thick polypropylene and 1/2" thick baffles. The smaller tanks are made from 1/2" thick polypropylene with 3/8" thick baffles.


How to Calculate the Capacity of Your Tank

To calculate the capacity of your tank, multiply the length x width x height in inches, divide by 1,728 and then multiply by 7.48. Then to deduct for the thickness of the sides and baffles, multiply your answer by .90 on a tank built from 1/2" or .875 on a tank made from 3/4" thick plastic. This will get within 5% which is close enough to get us started.


When working with a T tank, figure the top and bottom sections separately and then add them together.


If you would like to have a 10 gallon internal foam tank, then add 15 gallons (or 25 gallons for a 20 gallon tank) to your capacity to allow for it.


You may call 800-687-0128 and we will help you determine the size of your tank.


Standard Equipment on Every Tank Includes:

Stainless Steel Strainer Basket

Size based on capacity (4" or 6")

Water tank stainless steel strainer basket

Fill Tower with Hinged Lid

Size based on capacity.

Water Tank fill tower with hinged lid

Overflow Pipe

Size based on capacity (3", 4" or 6"); straight pipe or elbow through tank to exit behind the rear axle.

water tank overflow pipe

Lifting Eye

Removable lift eye is an option.

lifting eye for poly water tank

Suction Fitting

Piped to sump or to an anti-swirl plate in the tank; 3" standard.

suction fitting for water tank

Fill Fitting

1-1/2" Standard

Fill fitting for water tank

Sump with Drain

Or separate drain without sump.

sump drain for water tank

Limited Lifetime Warranty

Plas-Mac, Inc. issues a limited warranty equal to the service life of the vehicle upon which the tank is originally installed of 10 years.


Tank Options

Plas-Mac, Inc. offer s a wide range of customizable options to ensure our tank will fit your application. From more standard options such as plumbing and foam tanks to fully custom accessories, Plas-Mac, Inc. manufactures each tank to fit your needs.


Popular options include:

  • Internal foam tanks
  • Additional hose reel mount blocks
  • L shape or inverted L shape
  • Fast-fill fittings
  • Dump valve provision
  • Extensions on top for storage
  • Hose tray
  • Internal mounting blocks
  • Plain pipe pass through
  • Pressure pipe pass through for brush trucks that have whip lines at the front of the tank.
  • Pump platform—3/4” thick with gussets on the sides
  • Additional sight gauges
  • Wheel wells
  • Many other options available including a 3/4” upgrade for tanks less than 2,000 gallons. Adds about 15% to the cost.

Foam Tanks

Internal foam tank

Internal Foam Tanks


Built into a notch in the water tank; include hinged fill tower with latch, 1-1/2" strainer basket, and P/V vent; mounting tabs, sight gauge, and fill/drain/suction fittings or taps.


Standard size is 10 gallons, can be custom-built to most any size for your application.


If located at the front of the tank, foam can be piped through to the rear for easy access.


External Foam Tank

External Foam Tanks


Include hinged fill tower with latch, 1-1/2" strainer basket, and P/V vent; mounting tabs, sight guage, and fill/drain/suction fittings or taps. Custom built to any size, from 5 gallons and up.


foam fill stack used inside the foam tank to prevent foaming

The foam fill stack inside the foam tank prevents foaming while filling. Foam tanks are also vented to speed up filling.



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