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Water Flow Meter FL-30009 for 4" Pipe: 125 - 500 GPM

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Free UK Delivery Over £50

UK Mainland Only (Excludes Highlands)

All Prices include VAT

These units measure the water flow through your swimming pool type pipes.

It is often useful to see the water flow rate through the pipes on your pool or pond as this can be required to ensure that you have sufficient flow rate for heat pumps or filters

They can also be used for swimming pools or koi ponds or to measure the water flow through any 4" pipe.

A small hole is drilled in the pipe and the flow meter is mounted in the vertical (upright) position. A stainless steel clamp (included) holds the unit in place.
The units fit a standard 4" plastic pool pipe.


Other sizes are available for 1", 2", 2.5", 3", 4", 6" and 8" pipes - please email for details on these models


They show the flow in gallons per minute and litres per minute.

The range is between 125 - 500 GPM

The unit straps around 4" plastic pipes.

Free UK delivery. 

The lead time is around 1-week from order to delivery

Can be shipped to any country - please enquire for shipping cost.

Accuracy: 10% of FS
Meter Body Construction: Acrylic
Temperature Limit: 88°C (190°F) at 0 psi
Pressure Limit: 150 psi at 21°C (70°F)
Pressure Drop: 0 psi
Mounting: Horizontal pipe
Dimensions:     64 x 25 x 152 mm (2.5 x 1 x 6")
Weight: 0.45 kg (1 lb)

Any questions, please contact us

  • Model: 4" Pipe: 125-500 GPM
  • Shipping Weight: 4kgs
  • Manufactured by: HeatPumps4Pools