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(905) 238-5242
sales@waterra.com

(905) 238-5242
sales@waterra.com

SIMPLE SOLUTIONS FOR GROUNDWATER MONITORING SINCE 1985
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SIMPLE SOLUTIONS FOR GROUNDWATER MONITORING SINCE 1985

Micro Flow Groundwater Sampling Pump

Waterra Micro Flow Pump for Sampling

Micro Flow Groundwater Pumps are an evolution of the Waterra Pump (Inertial Pump) developed in Canada in the 1980’s. The Micro Flow system is a hand operated reliable and inexpensive pump comprised of a foot valve and a length of sampling tubing.

This system can be used in very narrow diameter piezometers, drive points or highly constricted sampling points. The flow rate for this system is quite small hence the name Micro Flow. Waterra Pumps are often dedicated to wells due to their low cost and to avoid cross-contamination or de-conning issues.

Waterra Pump System - Micro Flow

Drive Points
& Constrictions

Max Flow: 
1/2 gpm = 1.9 lpm
Max Lift:
75 feet = 23 m

Here's How a Waterra Micro Flow Pump Works

  1. An SS-10 Waterra Foot Valve is threaded into the bottom end of a length of either LDPE or HDPE Waterra Tubing.
  2. The Foot Valve – Tubing combo is inserted into the well, Foot Valve first, until the valve is submerged beneath the water table to the desired pumping depth.
  3. The tubing is then oscillated (pulled up and then pushed down) over a short vertical range (about 1 foot (30 cm) of motion by hand.
  4. Water builds up in the oscillating tubing until it discharges at surface.

Illustration of the Hand Operated

Micro - Flow System

Illustration showing operation of Waterra Pumps groundwater sampling system

Details of the Waterra Micro Flow Pump

Waterra SS-10 Stainless Steel Foot Valves showing Micro Flow HDPE and LDPE Tubing

The Micro Flow System is popular for use in direct push technology micro well installations and for tightly constricted piezometers

The SS-10 (Stainless Steel Foot Valve: OD = 10 mm) can deliver a sample from as deep as 75 feet (23 m) and flow rates with this system are usually less than 1/2 gallon per minute (1.9 lpm). The SS-10 thread up into the tubing.

Waterra Micro – Flow Tubing is used for this System. The tubing is available in HDPE and LDPE options. LDPE is a little more flexible than HDPE. Both HDPE and LDPE are available in 100 and 500 foot rolls.

Foot Valve - Stainless SteelMicro Flow TubingActuators
SS-10LDPE (Low Density Polyethylene)
— 0.375" OD X 0.25" ID
100 and 500 foot rolls

HDPE (High Density Polyethylene)
— 0.375” OD x 0.25” ID
100 and 500 foot rolls

FEP (Teflon)
— 0.375" OD X 0.25" ID
call for availability
By hand
Waterra SS-10 Stainless Steel Foot Valves - pair - with Micro Flow HDPE and LDPE Tubing for groundwater sampling
Waterra Pumps Low Density Polyethylene Micro Flow Tubing for Groundwater Sampling
Waterra Pumps High Density Polyethylene Micro Flow Tubing for Groundwater Sampling
Illustration showing operation of Waterra Pumps groundwater sampling system

Micro Flow System: < 1/4 gpm & max 33 feet – drive points - (< 1 lpm & 10 m)

Waterra Pump Accessories

Waterra Tubing Cutter

Waterra Tubing Cutter

Waterra Valve Wrench

Waterra Valve Wrench

Waterra 0.45 Micron Groundwater Filter - FHT & FMT

Waterra 0.45 Micron Groundwater Filter – FHT & FMT

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