Modified API RH Pump for Adhering Scale Conditions
    This special pump is assembled from standard components to aid with the problem of scale that adheres to pump parts, such as the inside of the pump barrel, causing the pump plunger to stick in the barrel when the pump is pulled or respaced.

    The arrangement of the lengths of the barrel and plunger allow the plunger to positively stroke out of the barrel on the upstroke and downstroke, cleaning the plunger and barrel completely of adhering scale on each stroke. The difference between this pump and a standard RH pump is the length of the barrel, plunger and extensions. Since it is assembled from standard components, parts are readily available and can be furnished in materials for corrosion or abrasion.