Double Valve Clear Eco Bailer: Groundwater Interval Sampler
A Double valve eco Bailer is designed to drop down the water column in a monitoring well allowing water to pass through. At the designated depth, the bailer’s downward descent is stopped and the bailer is then smoothly recovered to surface. But because there is both an upper valve and a lower valve, the water trapped between the valves is water from the interval in which the descent of the bailer was stopped. The valves prevent the “trapped” water from mixing with other water on the way out of the well.
All bailers are PFAS, PFOS & PFOA free.
Double Valve eco Bailers come with the handy Emptying Device which can also be used to direct the discharge flow and also for collecting VOC samples.
A Double Valve eco Bailer is easily fitted to Waterra 0.45 micron Groundwater Filters.
Low Density Polyethylene (LDPE) tubing (1/4inch OD or 1/2 inch OD) fits into the Bottom Emptying Device and connect with a Waterra Groundwater Filter. Bailed samples can be gravity flowed directly through the filter and captured in a sample container. It usually takes less than 2 minutes (depending on turbidity) to filter a sample this way.
Some things to think about!
ABOUT DOUBLE VALVE PVC ECOBAILERS
A Clear PVC Double Valve eco Bailer is used for sampling groundwater are as heavy (or heavier) than conventional weighted bailers. They sink straighter and the efficient valve design makes it the fastest sinking bailer available.
- faster sinking than polyethylene bailers
- inspect your sample through the clear tube
- fits with Waterra inline filters
- no leak PVC ball
Clear virgin PVC has a density of 1.31 grams per cubic centimeter (cc) versus polyethylene, which has a specific gravity of 0.96 to 0.98 grams per cc.