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Yamada air pump
This is a Yamada air pump model # NDP-25BST we use it at our Biodiesel plant on and off not longer have a use for.
This pump do not work, might just need new diaphragm or other internal parts new cost over $700.00 parts are easy to get
NPT Female 1" Intake and discharge connections
Maximum size solids <3/16"(4-8mm)