As the small RDRS workshop in Rangpur was unable to keep up with demand, RDRS helped local entrepreneurs set up workshops to make the treadle pump (known early on as the “twin treadle pump”). The first of the workshops was the North Bengal Agriculture Workshop in Lalmonirhat (NBAW), started in 1981. The fourth workshop was that of Mr. Narendra Nath Deb. Mr. Deb was already making pumps of his own design, but contracted in 1984 for his workers to be trained in making the treadle pump. By the end of 1984, 26,701 treadle pumps had been sold. Since 1985, 84 manufacturers now produce treadle pumps and have currently sold 1.4 million treadle pumps to small plot Bangladeshi farmers.