FireVoop™ seismic joint installation instructions

FireVoop compared with crooved coupling arrangement

One of the great advantages of the FireVoop™ seismic expansion joint is its simplicity. It is very easy to install, requiring nor more than one hanger and two connections. It is also extremely compact with a narrow profile that makes installation easy, allows for tight pipe runs, and minimizes the impact on designs.

Download installation instructions (pdf)

  1. FireVoop™ can be connected to adjacent piping with rigid or flexible type couplings.
  2. A Metraflex FireVoop™ may be installed in any orientation / position.*
  3. FireVoop™ support:
    1. No support is required for the (90°) return bend for the 2" FireVoop™.
    2. Support for the (90°) return bend for FireVoops larger than 2". A FireVoop™ hanging down requires no support. Support for other orientations can be provided in two ways;
      1. A hanger rod at the 90° that is 12" long or greater, for the ±4" of movement the FireVoop™ will allow the loop to swing and no additional steps are necessary.
      2. If the FireVoop™ is installed with hanger rods less than distances recommended above, a spring hanger assembly is recommended, to allow the FireVoop™ to flex during seismic event.
  4. FireVoops are shipped with the shipping bar to insure a neutral face to face during installation. This shipping bar must remain in place during installation, but then must be removed prior to testing.
  5. Clearance; FireVoop™ designed for;
    1. ±4" of movement, must have 4" of clearance all around the FireVoop™
  6. If the FireVoop™ cannot span the building's seismic separation, it may be installed with the closest elbow not more than 24 inches from the seismic separation.

* When FireVoop™ is installed in the up (90 bend above pipe run) position consideration should be given to the removal of entrapped air.