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Sometimes space restrictions require the installation of Big Dipper units in basement locations where significant head pressure becomes a factor.  The Big Dipper VFCA-20 Vented Flow Control module provides an option for use with installations where significant head pressure is present (greater than 6' [1.95 m]) or where applicable regulations require vented flow controls.  The Vented Flow Control helps reduce problems associated with high head pressure and helps slow the drainwater flow down the pipe, preventing it from exceeding 20 gallons per minute (1.26 l/s).  Includes appropriate PVC fitting and flow stainless steel flow control orifice.

  • Includes PVC fitting (3") and Stainless Steel Control Orifice
  • Designed to prevent flows from exceeding 20 gallons per minute (1.26 l/s)
  • Must be installed as close as possible to level at which kitchen fixtures are located
  • Air Intake (1 1/2") may be independence direct connect to atmosphere or code-approved air addmittance valve
  • Use of VFCA requires removal of MFC Flow Control (small rubber cap) from Inlet of Big Dipper
  • Never connect to facility vent
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