Have a Question? Talk to a Specialist! Call 1-800-739-7706Contact Us Now!

Solinst 429 Point Source Bailer

Solinst's 429 Point Source Bailer gives you accurate groundwater samples at specific depths, minimizing sample bias due to water from different sample areas mixing together. Because of this, the Solinst 429 is the ideal instrument for conducting aquifer profiles. As an authorized Solinst dealer, Environmental Equipment & Supply proudly carries the 429 as well as related products for groundwater monitoring and profiling in a variety of situations.

Rugged Construction, Simple Design

The Solinst Point Source Bailer is built for deployment in almost any condition. Made of 316 stainless steel with Teflon® ball valves and Viton® o-rings, the Solinst 429 will provide years of accurate sampling. The unit includes ball valves at both the top and bottom which ensure the sample is not contaminated as it is being raised out of the water. A stainless steel sample release device greatly improves the retention of volatiles when transferring to a sample container.

The 429 Point Source Bailer is available in 0.5, 1.0, 1.5 and 2.0 inch diameters and in two, three and four feet lengths. Smaller units are ideal for deployment in direct push devices and narrow wells. Wider units feature greater bailer capacity, with the 2.0 inch model capable of sampling up to 29 oz. per two feet.

Call 1-800-739-7706 for Pricing Information

How to Use

Using the Solinst 429 is simple — the unit is portable enough to be deployed by a single technician. Because it requires no ancillary equipment other than a support cable, the point source bailer can be used in locations where accessibility is an issue. Follow these simple steps to use the Solinst 429 in almost any field condition:

  • Slowly lower the bailer into a borehole until the desired sample depth is reached. As the bailer is lowered, the top and bottom ball valves will open up, allowing water to flow through the unit.
  • Steadily raise the bailer once the sampling depth is reached. As the bailer is raised, the top and bottom valves will close, ensuring the sample is not corrupted by water at other levels of the borehole.
  • Open the unit's top valve when you are ready to transfer the sample to its container. This will cause the sample to safely drain through the sample release device.
  • To ensure accuracy, decontaminate the Solinst 429 before taking another sample.


Environmental Equipment & Supply also sells the Solinst 103 Tag Line, the preferred support cable for the 429 Point Source Bailer. Designed for steady deployment and accurate depth readings, the 103 features an easy-to-use reel and laser-marked cable.

Contact Environmental Equipment & Supply for pricing and availability information about all Solinst products, including the 429 Point Source Bailer and 103 Tag Line. We have over 25 years of experience supplying environmental professionals with quality instruments that let them perform important field work with ease.