This type of bailer has a piston, set in motion by the traction in the steel handle. This pump is more efficient in the withdrawal of solid materials of the bottom of the well.

Sand Pump Plunger
Code	Diameter	Length (m)	Volume (Lt)	Weight (Kg)	Weight (lbs)
00.231.ND.500.045	4.1/2” pol	5	43	74	162
00.231.ND.500.055	5.1/2” pol	5	66	96	211
00.231.ND.400.065	6.1/2” pol	4	75	128	281