Koi Depot

FlowVis Flow Meter

FlowVis Flow Meter
FlowVis Flow Meter

FlowVis® has undergone exhaustive testing and calibration to ensure long life, accuracy, and repeatability. No other Flow Meter at this price point is NSF certified or comes remotely close to its +/- 2 GPM accuracy.*

FlowVis® is more than a Flow Meter; it is also a fully functioning Check Valve.

*Scale in LPM.


FlowVis® is available in two configurations:

  1. A retrofit kit that installs to a pre-existing Jandy® or Praher 2" x 2.5" Check Valve assembly
  2. A complete pre-assembled Check Valve assembly with FlowVis®

Unlike other Flow Meters, the position in which FlowVis® is installed (horizontal, vertical, or relative to elbows and tees), has only a minimal effect on accuracy.

What makes FlowVis® different?

Pool installers, owners, and operators finally have a Flow Meter that they can rely on. Accuracy, reliability, and longevity are key among a list of unique features that include:

  • Combined functionality of Flow Meter and Check Valve
  • NSF certified
  • Scale in LPM (Liter per minute)
  • Installation flexibility - far less space required than other flow meters.
  • Clear, easy to read scale
  • Installs in minutes
  • No calibration required
  • Unique design results in maintained accuracy even with entrained air caused by suction leaks
  • Assembled in the USA
  • 5-year breakage warranty
  • Rugged construction
  • Pressure tested to >50psi
  • Design life of 15 years with spring replacement every 7.5 years

Built to Last

FlowVis® is built to last. It's robust, yet unobtrusive design means that unlike competing Flow Meters, FlowVis® won't get kicked, tripped over, or broken. Infact, we're so confident in the durability of FlowVis® that the product has a 5-year warranty on breakage!

Unlike Pitot tube / Rotameter style devices, FlowVis® will not stick, bounce, or provide inaccurate readings of flow. There are no saddle clamps to corrode, flat rubber seals to deteriorate, or small holes to become blocked.

Item #
FlowVis Flow Meter 2-in. x 2.5-in. Check Valve assembly
$ 145.00