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Kohler MasterShower K-74 - User Manual

Kohler MasterShower K-74
36 pages
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1017598-2-A
Español, Página 13
Français, Page 25
MasterShowerTower
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

Questions and Answers

  • V
    vpetersonAug 4, 2025
    What to do if my Kohler Bathroom Fixtures have no flow?
    • T
      tracibarkerAug 4, 2025
      If your Kohler Bathroom Fixtures have no flow, there might be several reasons: * The water supply may not be turned on. In this case, turn on the water supply. * The water filter may be blocked. If so, clear the water filter (not supplied). * The strainer screen may be plugged. If this is the case, clean or replace the strainer screen. * In case of a pressure switch malfunction, contact your dealer.
  • L
    Larry SchneiderAug 12, 2025
    Why is there poor flow to other outlets in my Kohler Bathroom Fixtures?
    • R
      rebekahrogersAug 12, 2025
      If you're experiencing poor flow to other outlets in your Kohler Bathroom Fixtures, consider the following: * A blocked water filter could be the culprit. Clear the water filter (not supplied). * Low water pressure can also cause this issue. Ensure you provide a minimum static water pressure of 40 p.s.i. (2.8kg/cm²). * A plugged strainer screen might be the problem. Clean or replace the strainer screen to resolve this.
  • C
    Charles KellerAug 19, 2025
    What to do if Kohler Bathroom Fixtures flow to showerhead only?
    • M
      michaelbarrettAug 19, 2025
      If your Kohler Bathroom Fixtures only flow to the showerhead, it could be due to a few reasons: * There might be no power to the unit. Turn on the power at the circuit breaker. * In case of a transformer or solenoid malfunction, contact your dealer.
  • J
    Justin HaleAug 27, 2025
    Why is there poor flow to sheetflow in my Kohler Bathroom Fixtures?
    • J
      Jessica SanchezAug 27, 2025
      If you have poor flow to the sheetflow in your Kohler Bathroom Fixtures, here's what you can check: 1. A blocked water filter can restrict flow. Clear the water filter (not supplied). 2. Low water pressure can be a factor. Ensure a minimum static water pressure of 40 p.s.i. (2.8kg/cm²). 3. Too many outlets selected can impact sheetflow performance. Sheetflow performance is optimum when only sheetflow is selected. 4. A plugged strainer screen can also cause poor flow. Clean or replace the strainer screen.

Summary

Before You Begin

Specifications

Technical specifications for the MasterShower tower, including electrical and water requirements.

Important Notes

Key installation notes and recommendations, including water softener use and steam application warnings.

Tools and Materials Required

Lists all necessary tools and materials for the proper installation of the MasterShower tower.

Framing and Roughing-In

Installation

Transformer Kit Installation

Instructions for mounting the transformer kit in an accessible location near the shower tower.

Mounting Box and Valve Assembly

Steps for installing the wall mounting box and connecting the valve assembly before tower installation.

Sheetflow Assembly and End Cap

Guides for attaching the sheetflow component and end caps to the tower door assembly.

Showerhead Trim and Showerhead

Procedure for applying thread sealant and connecting the showerhead trim and bellows.

Tower Assembly

Steps for aligning and securing the tower door hinges to the wall mounting box.

Set Maximum Temperature

Procedure to adjust the maximum temperature setting of the Rite-Temp mixer valve.

Install Handle Trim and Handle

Instructions to align and attach the handle trim, sleeve, and grip ring to the valve stem.

Secure Tower Assembly

Guidance on securing the tower assembly to the wall mounting box using the provided latches.

Make Electrical Connection

Instructions for connecting the transformer leads and the incoming 120 VAC power line.

Start-Up

Troubleshooting

Kohler MasterShower K-74 Specifications

General IconGeneral
BrandKohler
ModelMasterShower K-74
CategoryBathroom Fixtures
LanguageEnglish

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