KOHLER K-408, K-409 Installation Manual

Installation Guide

Two-Way/Three-Way Valve

K-408 K-409

M product numbers are for Mexico (i.e. K-12345M)
Los números de productos seguidos de
M corresponden a México (Ej.
K-12345M)
Français, page ″Français-1″
Español, página ″Español-1″

086847-2-AC

Tools and Materials

Assorted
Screwdrivers

Hacksaw or
Tubing Cutter

Before You Begin

CAUTION: Risk of property damage. When installed in a
two-way configuration, the auxiliary outlet must be capped
off to prevent possible leakage out of the unused auxiliary
outlet, and the grey collar must be changed to the black
two-way stop collar.

CAUTION: Risk of product damage. The transfer valve is
designed for use with Kohler non-diverting bath spouts. Do
not use diverters, diverter spouts, or shut-off devices
downstream of the transfer valve.

CAUTION: Risk of product damage. Do not use
petroleum-based lubricants on the plastic components of this
valve.

Adjustable
Wrench

Solder

Plumbers
Putty

Sealant Tape

Propane
Torch

CAUTION: Risk of product damage. Excessive heat will
damage the internal plastic components. Follow these steps to
avoid product damage.

IMPORTANT! Do not apply excessive heat while soldering. Direct
the torch flame away from the brass body.

IMPORTANT! Only apply direct heat to the connectors and
extensions.

IMPORTANT! If there is limited access to the solder connections, or
if any other risk of excessive heat being applied to the brass body
exists, remove the cartridge prior to soldering. If you remove the
cartridge, protect the seals and O-rings from becoming dirty,
damaged, or misaligned.

086847-2-AC 2 Kohler Co.

Before You Begin (cont.)

IMPORTANT! A main valve must be installed upstream from the
diverter valve for shut off and temperature control.

Observe all local plumbing and building codes.

Shut off the main water supply.

Provide an access panel for all installations.

Carefully read this entire instruction manual before beginning the
installation; the illustrations do not show all possible
configurations.

For K-408: This valve can be installed to decks with a maximum
thickness of no more than 1-7/16″ (3.7 cm).

For K-409: This valve can be installed to decks with a maximum
thickness of no more than 3-7/16″ (8.7 cm).

The transfer valve is pre-assembled with a grey three-way stop
collar for three-way connections. To convert the valve for
two-way configurations, follow the instructions for changing the
grey collar to the black two-way stop collar.

The transfer valve contains an integral vacuum breaker.

Do not install handheld shower units on the bath outlet.

Kohler Co. reserves the right to make revisions in the design of
products without notice, as specified in the Price Book.

Kohler Co. 3 086847-2-AC

Main Valve Bodies

Auxiliary Shower

Diverter Valve

Braided Hose

Hose Connection

Decorative Hose

1. Component Layout

Verify the location of the components and the orientation of all
ports.

Determine the location and orientation of the transfer valve. The
location of the bath spout, handshower, and the optional auxiliary
shower will affect the piping and connectors needed.

Allow clearance for valve outlets, handles, bath spout, and
handshower hoses.

2. Preparation

Provide an access panel for all installations.

Allow for access to the connection between the handshower and
the handshower decorative base.

For easiest installation, do not install the bath unit until all
soldering (except supplies) is complete. Then install the bath and
connect the supplies.

Install the bath spout according to the spout installation
instructions. If possible, do not install the finished trim until all
other installations and construction are completed.

Install the main valve bodies upstream from the diverter valve
according to the valve body installation instructions.

Loosely secure the valve bodies.

086847-2-AC 4 Kohler Co.

Preparation (cont.)

Follow the handle installation instructions to temporarily
assemble the handles in order to adjust the valves to the proper
height before connecting the lines to the transfer valve or supply.

Kohler Co. 5 086847-2-AC

Collar Tab

Plated Nut

Black 2-way Collar

Transfer
Tube Stop

Collar Tab

Transfer tube
hole must
line up with
large port.

Grey Collar Slot

Locking Tab

Remove and
discard grey
3-way stop
collar.

Notch

Auxiliary
Outlet

Cap

Cartridge

Inspect seals
and o-rings.

Brass Body

3. Convert to Two-Way Valve

CAUTION: Risk of property damage. For a two-way
configuration only: the auxiliary outlet must be capped off to

prevent possible leakage out of the unused auxiliary outlet,
and the grey collar must be changed to the black two-way
stop collar.

NOTE: The valve is pre-assembled for use as a three-way transfer
valve.

Remove the plated nut.

Carefully pull the cartridge from the brass body.

NOTE: Use care to prevent the cartridge seals and O-rings from
falling off, or becoming dirty or damaged.

Line up the transfer tube stop with the slot in the grey collar.

Use a flat-blade screwdriver to carefully pry the two locking tabs
loose from the transfer tube.

Remove and discard the grey three-way stop collar.

Verify the hole in the transfer tube lines up with the large port in
the cartridge.

Align the black collar on the transfer tube with the collar tab lines
on the large port of the cartridge.

Snap the collar in place to ensure both locking tabs are fully
engaged.

086847-2-AC 6 Kohler Co.

Convert to Two-Way Valve (cont.)

Inspect the seals and O-rings for damage and proper fit. Make
any adjustments if needed.

Carefully work the cartridge into the brass body until the collar
tab fits into the notch in the brass body.

Thread the plated nut onto the brass body and hand tighten.

Kohler Co. 7 086847-2-AC

Collar (with flange up)

Plaster Guard

Cartridge

Plated Nut

Brass Body

Mounting Nut

Auxiliary Shower Outlet Port

Cap

Bath outlet Port

Washer

Handshower Outlet Port

Mixed Water Inlet Supply Port

4. Install the Transfer Valve

CAUTION: Risk of product damage. Excessive heat will
damage the internal plastic components.

IMPORTANT! Do not apply excessive heat while soldering. Direct
the torch flame away from the brass body.

IMPORTANT! Only apply direct heat to the connectors and
extensions.

IMPORTANT! If there is limited access to the solder connections or
if any other risk of excessive heat being applied to the brass body
exists, remove the cartridge prior to soldering. If you remove the
cartridge, protect the seals and O-rings from becoming dirty, being
damaged, or misaligned.

For K-408: This valve can be installed to decks with a maximum
thickness of no more than 1-7/16″ (3.7 cm).

For K-409: This valve can be installed to decks with a maximum
thickness of no more than 3-7/16″ (8.7 cm).

If installing to a finished deck: At the transfer valve install
location, drill a 2″ (5 cm) hole.

IMPORTANT! If the transfer valve is to be used in a two-way
configuration, solder a cap to the auxiliary outlet.

Solder the inlet and outlet connectors and extensions.

086847-2-AC 8 Kohler Co.

Install the Transfer Valve (cont.)

Remove the plaster guard and plated nut from the valve. Do not
remove the cartridge.

Remove the collar from the brass body.

Thread the mounting nut down onto the brass body.

Slide the washer onto the brass body until it is flush against the
mounting nut.

Slide the valve up through the deck/rim and thread the collar
part way onto the brass body with the flange up.

Hand tighten the plated nut onto the brass body.

Reinstall the plaster guard.

Position the collar to create a gap 1/8″ (3 mm) to 9/16″ (1.4 cm)
between the finished deck and the bottom of the plaster guard.

Securely tighten the mounting nut until it is flush against the
finished deck.

Dry fit all the piping and connectors.

Solder the remaining piping and connectors.

5. Install the Handshower

Install the hose guide and handshower according to the
instructions packed with the product.

Kohler Co. 9 086847-2-AC

Collar (with flange up)

Plaster Guard

Cartridge

Plated Nut

Brass Body

Mounting Nut

Auxiliary Shower Outlet Port

Cap

Bath outlet Port

Washer

Handshower Outlet Port

Mixed Water Inlet Supply Port

6. Complete the Valve Installation

Remove the plaster guard.

Turn on the main water supply.

Confirm proper operating of the transfer valve and associated
fittings.

Carefully inspect the entire installation for leakage and proper
operation. Adjustment as needed.

Hand tighten the plated nut to the brass body.

NOTE: If the trim will not be installed immediately, reinstall the
plaster guard.

Install the trim according to the instructions packed with the
product.

7. Installation Checkout

Complete the installation of the valve, valve trim and any other
components according to the instructions packed with the
product.

Ensure all connections are tight.

Open the drain.

Turn on the main water supply and check for leaks. Repair as
needed.

086847-2-AC 10 Kohler Co.