Wayne Sump Assembly - Wayne Vista Series Service

5.6.

WAYNE SUMP ASSEMBLY

When air enters a suction type pump, it is eliminated by the air separator inside the
compact pumping unit and the sump assembly. In the pumping unit, gasoline vapors rise
to the top and escape to the sump assembly. At the top of the sump assembly is an orifice
connected to the nozzle boot via a copper tube. This tube provides an outlet for the
vapors. Along with this vapor is a small amount of product. This fluid remains in the
bottom of the sump. A needle valve at the bottom of the sump provides for recirculation
of the product. As the level of product rises in the sump, a float rises, opening the needle
valve and allowing the gasoline to pass through copper tubing back to the suction side of
pump.
November 1992 Part No. 917543 Rev. A
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