Connect discharge and suction tubes if previously disconnected.
3-44. EFFLUENT LAUNDER TUBE.
General. The effluent launder (15, fig. 3-24) is a one-piece circular shaped aluminum trough that surrounds
downcomer tube (13). It is attached to the bridge rails (13, fig. 1-3) by three leveling rods (18). It collects the clear water
from the upper section of the erdlator tank and discharges it into the wet well tank (7). The effluent launder and the wet
well are connected by a plastic tube (14, fig. 3-24). Clear water collected by the effluent launder flows through tube to
the wet well tank.
Dry-cleaning solvent, P-D-680, used to clean parts is potentially dangerous to personnel and property.
Wear chemical resistant gloves when using solvents, and avoid repeated or prolonged skin contact. Do
not use near open flame or excessive heat. Flash point of solvent is 100 degrees F to 138 degrees F (38
degrees C to 59 degrees C).
Cleaning. Clean the plastic tube with dry-cleaning solvent or soap and water.
Inspection. Inspect the tube for cracks and deterioration and the clamps for cracks and damaged screw threads.
3-45. LOWER FILTER HOUSING AND FILTER HOUSING COVER.
General. The filter section contains two diatomite filters (3, fig. 1-3) specifically designed to employ the filtration
properties of diatomaceous earth. The filters are essentially a two-part cylinder containing six filter elements each with a
total filtering area of 10. 02 square feet. Each filter has two pressure gages for indicating the pressure on the influent
and effluent side of the filters: a precoat funnel (16) for adding prepared diatomiate slurry for precoating the filter
elements; and an air release valve (4) for releasing air trapped in the filter.
Cleaning. Clean the inside of filter housing cover (fig. 3-25) and the filter housing with filtered water.
Save undamaged clamps for the installation of new tubing.