The Inertial Pump is an efficient, reliable and inexpensive pump suitable for purging and sampling groundwater monitoring boreholes. It performs well in harsh environments that would ruin other more expensive pumps and is a great choice as a dedicated sampler in contaminated land investigations to avoid cross-contamination between borehole samples. Our Inertial Pump tubing and foot valves enable pumping from boreholes of 10mm diameter and upwards. 6 tubing sizes are available accompanied by a range of Stainless Steel and Delrin foot valves. Tubing and valves are available for sampling from narrow tubes and piezometer pipes to monitoring boreholes of up to 200mm diameter. Manual operation is possible, but it is easier to operate mechanically with the PowerPack PP1 for greater depths.

Select a system using the options below, or build your own system by navigating to the related products.

• High Flow System: for use where higher pumping rates are required or for the development of monitoring boreholes. The system is typically used in either 50mm or 100mm (and up to 200mm diameter) boreholes to a maximum depth of 40 metres. Maximum flow rate (under ideal conditions) is between 10 and 15 litres per minute.The system can also be used for cleaning and development of 50mm diameter monitoring boreholes using a Waterra Surge Block.
• Standard Flow System: for use from 13 to 16mm ID tubes (10 to 16mm ID for STDX). 
• Low Flow System: highly recommended for purging and sampling. from 17 to 19mm ID piezometer tubes. The 13mm OD inertial pump tubing leaves sufficient annular space in the piezometer tubes to maintain a steady flow rate. In all but very low yielding situations. It can be operated manually to approximately 30m achieving flow rates of up to 1.5 l/min.
• Micro Flow System: highly recommended for purging and sampling from 13 to 16mm ID piezometer tubes. It can be operated manually to approximately 30m achieving flow rates of up to 0.5 l/min.
• Super-Micro Flow System: used for purging and sampling from 10mm ID tubes. It can be operated manually to approximately 30m and by the use of an adaptor clamp can be mechanically operated with the PowerPack PP1 to around 40m, achieving flow rates of up to 0.3 l/min.