Came across a semi-trash pump in a tool catalog. Went online to learn
about it and there are loads of pages selling them, but nothing to
describe what it does. To confuse things further, they were also
selling trash pumps! Huh? Semi-trash pumps .... trash pumps? What
do they do? Thanks

Dumb and Ditzy wrote:
Came across a semi-trash pump in a tool catalog. Went online to learn
about it and there are loads of pages selling them, but nothing to
describe what it does. To confuse things further, they were also
selling trash pumps! Huh? Semi-trash pumps .... trash pumps? What
do they do? Thanks

Third listing when Googling for "semi trash" pump:
http://flow-control.globalspec.com/L...ps/Trash_Pumps

Trash pumps are designed to pump large amounts of water that contains
hard and soft solids such as mud, leaves, twigs, sand, and sludge. Most
devices are portable, heavy-duty centrifugal pumps that feature deeper
impeller vanes and larger discharge openings than other pumps. Trash
pumps, which are capable of processing materials with suspended
particulates that would clog other centrifugal pumps, can move hundreds
or even thousands of gallons per minute.

Semi-trash pumps, a type of trash pump with a smaller opening, are not
designed to handle large solids or high concentrations of solids.
Consequently, regular trash pumps are better suited for applications
that require the rigorous pumping of solid-laden water or slurries.
Because some manufacturers do not separate trash pumps from semi-trash
pumps, so a careful analysis of product capabilities is important when
selecting devices.