Last year we created a mechanism that provides visual proof that the HydraSleeve Check Valve closes when the HydraSleeve is full and remains closed as it travels through the water in a 2-inch, schedule 40 tube (faux well). We call it the HydraSleeve Test Chamber.
Earlier attempts at testing and demonstrating how the check valve works had to be limited to a standing water column of no more than 15 feet for logistical reasons. Here the water flowing past the stationary HydraSleeve can represent 100's of feet of stagnant water. Picture a wind tunnel for HydraSleeves.
This test chamber video answers questions about the HydraSleeve check valve working when the sleeve is used in wells where large amounts of stagnant water lies above the screen zone. As seen in the video the HydraSleeve check valve closes when the bag is full and it remains closed while it is recovered through the well casing.