D.J. Gongol and Associates, Inc. are the exclusive manufacturer's representatives and distributors for ARI Flow Control Accessories in Iowa and Nebraska. ARI Flow Control Accessories manufactures combination air valves with the patented "Rolling Seal." The rolling seal design is a revolutionary development that costs less to install and is easier to maintain than any other combination air valve on the market.

ARI's combination air valves for potable water are available in two NSF-approved models: the D-040 and D-060. Both operate as combination air valves, with the D-040 designed for use in normal applications, and the D-060 designed for high-flow installations.

In addition, ARI has introduced the D-090, an exciting version of the D-040 that can be installed in underground applications without a manhole!

Below are answers to a few common questions:
  • We have used other valves for years. Why switch to ARI?

    ARI valves offer several key advantages:

    1. patented "rolling seal"
    2. NSF approval
    3. light weight
    4. corrosion-proof materials of construction

  • What is the ARI "rolling seal"?

    ARI developed the patented "rolling seal" to take the place of the complicated assemblies used by competitors. The pins and hinges found in other air valve designs are a critical failure point. The ARI rolling seal instead uses rubber's natural flexibility to provide a tight seal that is flexible enough to hold even in turbulent conditions. By rolling into place rather than slamming shut, the ARI design reduces shocks and pressure surges that are common to other air valve designs. Ask us to tell you more.

  • Why is NSF approval important?

    In Iowa, state law requires that NSF-approved products be used wherever available on drinking-water systems. In fact, all 50 states now either suggest or mandate NSF approval on products used in their drinking water systems. ARI is the only manufacturer of NSF-approved air valves for potable water.

  • What makes ARI valves lightweight? Why does that matter?

    Most combination air valves are made of cast iron with metal internal components. ARI valves have reinforced nylon bodies with internal components of materials like foamed polypropylene and EPDM rubber. A full-sized 2" D-040 combination air valve weighs just three pounds. At such a light weight, the valve can be installed anywhere without requiring extra pipe reinforcements, and maintenance can be easily performed in the field. Smaller ARI valves weigh less than a pound.

  • How are ARI valves corrosion-proof?

    The internal components of the ARI valves are made of corrosion-proof materials like polypropylene, rubber, and reinforced nylon. The only metal you'll find in an ARI combination air valve is stainless steel.

  • Why do we need automatic air valves when we can use hydrants to remove air from our water system?

    It's a common misconception that hydrants work as well as automatic air valves, but there is no substitute for automatic air valves at every high point in your system. Please see our hydrants vs. air valves FAQ for details.
Combination air valves from ARI are the most advanced sold anywhere in the world. Contact us for custom specifications and calculations by using our RFQ page, and we'll be happy to share more about them with you.

last revised 10.10.2005