Installation

6
Support Rods
Drain Bell
Outlet
Cap Screws
Valve Body
Assembly
Valve Body
Seals
Handle
Figure 4
General Instructions
7. Connect the drain line to the waste drain Outlet. If Outlet Adapters are used, seal all
threaded connections with pipe sealant.
8. Open and close the waste drain several times to check the operation. Check for
leaks.
Maintenance
Figure 4 shows a maintenance explosion of the Modular Waste Drain.
Under normal operation, the anticipated service parts of a B-3990 Series waste drain
are the Valve Body Assembly and/or Valve Body Seals. These parts can usually be ser-
viced or replaced without removing the waste drain from the sink or disconnecting the
drain line from the waste drain. The Valve Body Assembly is a non-serviceable part and
is simply replaced if repair is needed. The replacement Valve Body Assembly comes
with (2) Valve Body Seals. A Valve Body Seal Kit containing (2) seals is also available if
only seal replacement is needed.
Valve Body / Valve Seal replacement (Figure 4)
1. If Over ow is used – Loosen the over ow tube connection at the over ow port on
the Outlet of the waste drain. It may not be necessary to remove the over ow tube.
2. Open the waste drain valve by fully extending the Handle.
3. Loosen and unscrew the (2) Support Rods attached to the ends of the Handle. Push
them back into the Handle Guard to get them out of the way.
4. Remove the (4) cap screws that attach the Outlet to the waste drain assembly.
5. Pull the Outlet free from the waste drain assembly. There is usually enough play in
the drain line and over ow tube to separate the Outlet from the drain assembly.
6. The Valve Body Assembly with the Handle will pull clear of the waste drain once
enough separation of the parts has occurred.