2-45.1. 3-WAY BALL VALVE (BACKWASH) REPAIR (Models H-9518-1 H-9518-2, and
Wash all components with clean water and detergent.
Rinse components in clean water and dry with wiping rag.
Use wire brush to clean all threaded fittings.
Inspect all threaded components for damaged threads,
Inspect ball (29) and ball seats (34 and 35) for deep scratches and corrosion.
Inspect body (31) for cracks and corrosion.
Inspect check valve (18) for damage. Replace if damaged.
Replace packing (32), thrust washer (33) seats (34 and 35), and body seal (36).
Replace damaged components.
Replace the stem (28), packing (32), thrust washer (33), and packing nut (30). Be careful not to damage any
of the components. If necessary, drive the items in with a soft piece of scrap wood. Tighten the packing nut
(30) until the stem (28) is resistant to movement but will still move.
Replace the seats (34 and 35) in the body (31) and in the adapter (27), again using care not to damage the
components. The concave side of the seat (34 and 35) must face away from the brass casting surfaces.
Position stem (28) and insert ball (29). Twist the ball (29) until it engages stem (28). Position the ball (29)
with one large hole pointed towards the valve body opening (right side when viewed from the stem) and the
other hole towards the top pipe connection.
Replace the body seal (36) into the body (31) and screw adapter (27) into body (31). Make sure that the
adapter (27) does not pinch the seal when tightening. While tightening the adapter (27), turn the stem (28)
and ball (29) to make sure nothing is binding. Screw the adapter (27) into the body (3 1) until no gap exists.
Turn the stem (28) back to a position where water can flow from the adapter end (27) [left when viewing
from stem] to the top.
Change 1 2-188.5