Before You Begin (cont.)
CAUTION: Risk of product damage.
Do not apply
petroleum-based lubricants to the valve components, as damage
may result.
Shut off the main water supply.
Observe all local plumbing and building codes.
Inspect the waste and supply piping for damage. Replace as
necessary.
The bottom port of the thermostatic mixing valve is intended for
use as a bath filler only. If a bath spout is not used with this
product, cap the bottom port.
The thermostatic mixing valve cartridge does not contain an
integral volume control/shut-off valve. You must install a
separate volume control/shut-off valve (K-406) downstream of
any valve outlet that does not have an integral shut-off valve. The
K-400 and K-402 thermostatic mixing valves require separate
volume control/shut-off valves downstream of each mixing valve
outlet.
The K-401 and K-404 thermostatic mixing valves contain a single
volume control shut-off valve for controlling the water flow
through the shower outlet. When plumbing to the valve’s bath
outlet, you must install a separate volume control shut-off valve
(K-403) downstream from the bath outlet.
The K-402 and K-404 thermostatic mixing valves do not have an
integral aspirator. For installations that use a bath diverter spout,
you must install a twin ell (K-9663) with integral aspirator
between the valve and the bath spout. If these thermostatic
mixing valves are installed without an aspirator it will cause
water to flow from the shower and bath spout at the same time.
Determine the correct drain size and capacity for your
installation. If two thermostatic mixing valves are used together,
water flow volumes between 16 and 24 gpm (61 and 91 lpm) or
more are possible, depending upon the water supply pressure.
Determine the correct water heater size and capacity for your
installation. A typical shower installation uses an approximate
mix of 75% hot water and 25% cold. A custom shower application
using three 2-1/2 gpm (9.5 lpm) showerheads can use about 45
gallons (170 liters) of hot water in 8 minutes. Choose a water
heater large enough for your installation.
Kohler Co.
3
1021063-2-C
