Next-generation Grinnell One-Bolt Coupling features customized gaskets to join fire suppression piping faster and easier

The G-Fire One-Bolt Figure 579A is a grooved, rigid coupling ready for out-of-the-box, push-on installation. The 2- through 4-inch couplings use redesigned, self-lubricating gaskets for a smooth installation experience. Gaskets are customized to coupling sizes to help prevent rolls and pinches for a truly secure, rigid joint

MILWAUKEE Johnson Controls, the global leader for smart, healthy and sustainable buildings, launches the next-generation Grinnell G-Fire One-Bolt Figure 579A Coupling with customized gaskets for more secure fitting on fire suppression pipe joints. The grooved, rigid coupling is ready to connect right out of the box, providing contractors with a fast and smooth installation experience.

Courtesy Photo
Courtesy Photo

“Whether contractors are installing a fire sprinkler system in a storage facility or standard commercial space, their time is valuable. Joining pipe shouldn’t be time consuming or laborious,” said Martin Schulte-Frankenfeld, global director product management, Johnson Controls. “We’ve improved this next generation coupling with customized gaskets so contractors can simply position the coupling and tighten a single bolt. We’re excited to offer such a time-saving addition to our One-Bolt Coupling portfolio that gives contractors more confidence in their fire suppression system installations.” 

In addition to speeding up installation, the One-Bolt 579A Coupling features center-stop gaskets customized to specific coupling sizes to help ensure proper positioning. The 1.25- and 1.5-inch coupling sizes keep their proven, powder-lubricated gasket, ideal for small pipe diameters, while 2- through 4-inch sizes use a redesigned self-lubricating gasket intended to optimize protection against rolls or pinches. A low-profile spine allows contractors to install couplings in tighter spaces, while 360-degree pipe contact ensures a truly rigid joint.

Pre-assembled and pre-lubricated, the 579A coupling features an innovative, three-piece housing and just one bolt to tighten. The coupling’s single-bolt design eliminates alternate tightening and assists in more consistent installations and dependable product performance. The coupling has a pressure rating of up to 365 psi and is UL/ULC Listed, FM Approved, VdS Approved and LPCB Approved.

For more information about the Grinnell G-Fire One-Bolt Figure 579A Coupling, visit

About Johnson Controls:

At Johnson Controls, we transform the environments where people live, work, learn and play. As the global leader in smart, healthy and sustainable buildings, our mission is to reimagine the performance of buildings to serve people, places and the planet.

Building on a proud history of more than 135 years of innovation, we deliver the blueprint of the future for industries such as healthcare, schools, data centers, airports, stadiums, manufacturing and beyond through OpenBlue, our comprehensive digital offering.

Today, with a global team of 100,000 experts in more than 150 countries, Johnson Controls offers the world`s largest portfolio of building technology and software as well as service solutions from some of the most trusted names in the industry.

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