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MasterShower
Tower
K-74
1. BEFORE YOU BEGIN
A. SPECIFICATIONS
MasterShower tower
K-74
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International version (no transformer)
K-74-JA
. . . . . . . . . . . . . . . .
Electrical rating
120 VAC, 60 HZ, 60 watts
. . . . . . . . . . . . . . . . . . . .
Electrical service requirements
120 VAC, 60 Hz, 15 A
. . . . . . . . .
Transformer Output Voltage
12 VAC +/– 5% @5 A
. . . . . . . . . . . .
Recommended cut-out size in finished wall for MasterShower
tower is 6-1/8” (15.6cm) x 45-11/16” (116cm).
Recommended rough-in height will provide showerhead outlet at
6’ (1.8m) height. [A 6’ (1.8m) to 6-1/2’ (2m) height is typical].
Distance from transformer to tower assembly is a maximum of 12’
(3.7m).
Minimum static water pressure requirement is 40 p.s.i. (2.7 bar).
B. NOTES
IMPORTANT: Mounting box must mount with back of
mounting box flange flush to outside surface of finished wall.
Do not mount the box until completion of finished wall.
Kohler recommends the use of a water softener if this product is
being installed in a location with hard water.
This product is not designed for steam applications,
and may not perform satisfactorily as a steam unit.
Make sure all water lines are purged prior to final connection
to the MasterShower tower water inlets.
When installing the unit in areas with sand or other sediments in
water lines, Kohler recommends the following Ametek, or
equivalent, filters: Cold Water = HF150S1, 3/4” I.P.S. inlet filter; Hot
Water = WH34 RB25, 3/4” I.P.S. inlet filter.
Installation with fiberglass or acrylic shower enclosures may not
provide adequate clearance for MasterShower tower mounting.
The MasterShower tower requires a flat mounting surface for its
entire height.
Installation requires horizontal cross members. Installation does
not require vertical studs, but they may be necessary to support
thin-walled surfaces around the mounting box opening.
Risers must extend 7” (17.8cm) above bottom cross member for
mounting box.
Supply strain relief bushing where 120 VAC line with
ground enters transformer enclosure.
A licensed electrician should make all electrical connections.
OBSERVE ALL LOCAL PLUMBING CODES.
All information in these instructions is based on the latest
product information available at the time of publication. Kohler
Co. reserves the right to make changes in product
characteristics, packaging, or availability at any time without
notice.
C. TOOLS AND MATERIALS REQUIRED
TOOLS REQUIRED
Hacksaw or tubing cutter
Propane torch
Caulking gun
Electric drill
9/64” drill bit (for pilot hole, see materials note below)
15/16” open end wrench (for supply couplings)
Screwdrivers
Nut driver assortment
Pliers
Strap wrench
Strain relief bushing tool
Hex key assortment
Adjustable or open end wrenches
MATERIALS REQUIRED
2x4 or 2x6 framing lumber
1/2” copper tubing
1/2” threaded adapter CXM (2)
One-hole electrician’s strap for 1/2” tubing risers
Solder/flux
Adhesive Sealant
(Optional) Wall anchors (6) & drill bit for supplied #8-16 x 2”
Phillips head screws for mounting to hard/thick finish wall
materials.
Thread sealant
Strain relief bushing
Transformer enclosure mounting screws
