Dultmeier Sales will be closed Thursday, November 22nd and Friday, November 23rd in observance of Thanksgiving

Dultmeier Sales will be closed Tuesday, December 24th at 12pm and all day Wednesday, December 25th.
Normal operations will resume Thursday, December 26th. We wish you and your family a very Merry Christmas!

Dultmeier Sales will be closed Wednesday, January 1st in observance of
New Year's Day

Dultmeier Sales will be closed Thursday, July 4th and Friday, July 5th in observance of Independence Day.
Normal operations will resume Monday, July 8th. We wish you a happy 4th of July!!

We are experiencing some technical difficulties on dultmeier.com and apologize for any inconvenience.
If you are running into issues, please phone your order in to 1-888-677-5054

Customer Pickup Orders: to help reduce exposure for our customers and our employees, if you are placing an order for in-store pickup please call in your order ahead of time or place your order online and pre-pay with a credit card. Be sure to let us know when you plan to arrive. We will have your merchandise ready for you and will greet you outside our facility. Thank you for your help!

Design Tanks

Fiberglass & Poly Tanks

Design Tanks has been producing fiberglass-reinforced plastic (FRP) tanks for over 50 years. Their headquarters is located in Sioux Falls, SD and they have an additional facility, dedicated solely to the production of 12ft diameter tanks in Belle Fourche, SD. In comparison to steel storage tanks, fiberglass is roughly 75% lighter than steel which allows for easier installation.

Fiberglass tanks have an average life expectancy of 20-30 years. Compare that to the average life expectancy of poly tanks (10–15 years) and you can see the added benefits of fiberglass tanks. From energy storage to fertilizer storage Dultmeier Sales can help you find a solution.

Please call us at 1-888-677-5054 for pricing or further information.

Manufacturer Website: www.designtanks.com

Fiberglass vs Poly Tanks:

  • Fiberglass tanks offers greater longevity – roughly twice the lifespan of poly.
  • Polyethylene tanks can potentially swell three to four percent over its lifespan; a fiberglass tank has an extremely low co-efficient of expansion.
  • Manways can easily be installed on fiberglass tanks as this does not negatively affect the integrity of the tank structure
  • An internal slope bottom can be installed in fiberglass tanks which will allow for complete drain out.
  • There is design freedom with fiberglass tanks that allows one to install accessories anywhere on the tank vs. flat areas only on polyethylene tanks.
  • Hold-down systems can easily be supplied on fiberglass tanks to allow for anchoring to protect against wind shear and seismic activity.
  • Design Tank Trusted Expertise
  • Design Tank Technology
  • Design Tank Manufacturing
  • Design Tank Global Provider