be incorporated into the bailer body because of the specific gravity of polypropylene to offset its buoyancy and permit the bailer 11 to sink rapidly in a well or any other area being tested preferably this weight is located near the bottom of the bailer allowing it to descend in an upright position and fill properly in open bodies of water such as lakes ponds reservoirs or streams after use the ring may be easily removed for recycling purposes by crushing the bailer body the inlet valve means 12 may consist of for example a ball 23 or any other shaped object which functions as a valve and which rests in a seat 26 formed in the body 14 to constrain the longitudinal motion of the ball when emptying through the pour spout 21 the configuration of the body 14 at the location just above the ball 23 is constricted to a dimension slightly smaller than the diameter of the ball 23 this can be done with appropriate indentations 25 which narrow or neck in the taper at that point during assembly the ball 23 is easily placed in its location by pushing it through the restriction 25 the resilience of the body 14 allows the ball to be thus installed with minimum force the preferred embodiment of the bailer 11 is shown in fig1 with the preferred embodiment of the check valve being shown in both fig1 and 2 the bailer 11 is a tube with tapered upper and lower ends 17 18 the.