40mm Random Flow Generator™ – RFGS40MM

  • Female Slip Fitting for standard 40mm  PVC pipe with a nominal O.D. of 40mm
  • Creates a random flow pattern with no moving parts!
  • Fits 40mm PVC Pipe
  • Printed in Reef-safe PETG plastic. See our FAQ’s
Flow recommendations
The RFG Nozzle will handle far more flow than the "Optimal" GPH recommendations, so we encourage you to experiment and test the limits of the RFG Nozzles.
ModelMinimum LPHOptimal LPH
40mm RFG1,890 - 2,270
3,785 - 5,675+


4 in stock (can be backordered)

SKU: RFGS40MM Category: Tag:

The Random Flow Generator™ Nozzle
The internal structure of the RFG Nozzle is comprised of a 5-vane helix that spirals nearly the entire length of the nozzle. Each vane of the helix is connected to an eductor at the base. Together, they form a set of internal channels.
The channels work to randomly direct the flow in one direction or the other as it exits the nozzle.





40mm PVC Slip Fitting

The RFGS40MM is design to snugly fit on to the end of standard 40mm PVC pipe. No glue and no re-plubming – just slip it on.







Flow Demonstration of the 1in RFGS100 nozzle

40mm demo coming soon