Nano Flow Groundwater Sampling Pump
Waterra Nano Flow Pump for Sampling
Nano Flow Groundwater Pumps are an evolution of the Waterra Pump (Inertial Pump) developed in Canada in the 1980’s. The Nano 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 Nano Flow. Waterra Pumps are often dedicated to wells due to their low cost and to avoid cross-contamination or de-conning issues.
0.17 inch x 1/4 inch
1/4 gpm = 1 lpm
33 feet = 10 m
- A SS-6 or SS-9 Waterra Foot Valve is attached the bottom end of a length of either LDPE or HDPE Waterra Tubing.
- 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.
- 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.
- Water builds up in the oscillating tubing until it discharges at surface.
Illustration of Hand Operated
Nano - Flow System
The Nano Flow System is popular for use in direct push technology micro well installations and for tightly constricted piezometers
The SS-6 and SS-9 (Stainless Steel Foot Valves: OD = 6mm and 9 mm) can deliver a sample from as deep as 33 feet (10 m) and flow rates with this system are usually less than 1/4 gallon per minute (1 lpm). The SS-6 threads up into the tubing and the SS-9 threads over the tubing.
Waterra VOC Tubing is used for the Nano Flow System. The tubing is available in HDPE and LDPE options. LDPE is a little more flexible than HDPE.
|Foot Valves - Stainless Steel||Tubing||Actuator|
|LDPE (Low Density Polyethylene)|
— 0.17" OD X 1/4" ID
100, 200(US only) and 500 ft rolls
HDPE (High Density Polyethylene)
— 0.17” OD x 1/4” ID
100, 200 (US only) and 500 ft rolls