File:FrankBirch LBSC WaterPump LSJune1980.jpg

This little duplex pump is of LBSC design and was built by Frank Birch. It has 5/16 inch bore (steam) and 5/32 inch water pistons. Although made to pump water, this tiny rig withstood a test by steam as it pumped up a toy balloon with air. From Live Steam Magazine, June 1980.