Product Overview

The FlowVis FV-3-40 Flow Meter by H2flow Controls is a 3-inch flow meter for pool and spa circulation systems, designed for 3" Schedule 40/80 pipe. It measures flow rates from 70 to 240 GPM and reads directly on a clear scale, with no calibration required.

Ideal For

Commercial and large residential pool circulation systems using 3" pipe

Verifying pump and filter flow rates during startup and service

Equipment pads with limited straight pipe runs

Key Features

For use with 3" Sch. 40/80 Pipe

Measure flow rates from 70 to 240 GPM

Installation flexibility; installs horizontally, vertically, or even upside-down

Can be installed with little-to-zero straight pipe requirements with no effect on accuracy

98% accuracy

NSF 50 certified - pending

Clear, easy-to-read scale in GPM or optional LPM or M3/h with velocity scale

Installs quickly and easily with no calibration required

15-year design life, 3-year warranty

Specifications

Warranty & Compatibility

Compatibility Notes

The FV-3-40 is sized for 3-inch Schedule 40/80 pipe. Confirm your pipe size and expected flow range before ordering; FlowVis meters for other pipe sizes are separate part numbers.

Installation Notes

The meter can be installed horizontally, vertically or upside-down and needs little to no straight pipe before or after it. Install according to the manufacturer's instructions; no calibration is required.

Customer-Facing Q&A

Q: What is the part number for this flow meter?
A: FV-3-40.

Q: What pipe does the FV-3-40 fit?
A: 3" Schedule 40/80 pipe.

Q: What flow range does it read?
A: 70 to 240 GPM.

Q: Does it need long straight pipe runs?
A: No. It can be installed with little to no straight pipe with no effect on accuracy.