Kohler STERLING 7726 Series User manual

Installation Guide
Bath with Airjets
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7726 Series 7727 Series 7728 Series
7730 Series 7731 Series
1139487-2-H

INSTALLATION INSTRUCTIONS
WARNING: When using electrical products, always follow basic precautions, including the
following:
DANGER: Risk of electric shock. To reduce the risk of electrical shock, connect the pump or
blower only to a properly installed Ground-Fault Circuit-Interrupter (GFCI). Do not remove the
plug grounding pin. Do not use a grounding adapter.
WARNING: Risk of injury or property damage. Please read all instructions thoroughly before
beginning the installation, including the following requirements.
WARNING: Risk of electric shock. A qualified electrician should make all electrical connections.
WARNING: Risk of electric shock. Disconnect power before servicing.
Building materials and wiring should be routed away from the pump or blower body and other
heat-producing components of the unit.
Grounding is required. The unit should be installed by a qualified service representative and grounded.
Install to permit access for servicing.
An equipment grounding terminal is provided in the field wiring compartment. To reduce the risk of electric
shock, this terminal must be connected to the grounding means provided in the electric supply panel with a
conductor equivalent in size to the circuit conductors supplying this equipment.
Install this unit in accordance with the Canadian Electrical Code, Part I.
NOTE: Follow all local plumbing, building, and electrical codes.
Product Information
Electrical Requirements
NOTE: If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or
similarly qualified persons in order to avoid a hazard.
The installation must include a Class A Ground-Fault Circuit-Interrupter (GFCI). The GFCI protects
against line-to-ground shock hazard. Use a 120 V, 15 A, 60 Hz dedicated service for the bath with
airjets.
Product Notices
WARNING: Unauthorized modification of the pump or blower may cause unsafe operation and
poor performance of the product. Do not relocate the pump or blower, or make other modifications
to the system, as this could adversely affect the performance and safe operation of the product.
Sterling shall not be liable under its warranty or otherwise for personal injury or damage caused by
any such unauthorized modification.
Factory-Assembled Features
Factory installed components include: blower with power supply cord, air switch transmitter, and
airjets.
Connections and Service Access
Before installation, verify proper access to the final connections.
1139487-2-H 2 Sterling

Table of Contents
INSTALLATION INSTRUCTIONS ..................................................... 2
Tools and Materials ............................................................... 3
Before You Begin ................................................................. 3
Roughing-In ..................................................................... 5
Prepare the Site ................................................................. 6
Rough-In the Plumbing – Alcove Installations ............................................ 7
Rough-In the Plumbing – Drop-In Installations ............................................ 8
Install a Mortar Cement Bed (recommended) ............................................ 9
Prepare the Bath – Alcove Installations ................................................ 10
Install the Optional Apron – Alcove Installations .......................................... 11
Prepare the Bath – Drop-In Installations ............................................... 12
Install the Electrical Outlet ......................................................... 13
Position the Bath ................................................................ 14
Secure the Bath – Alcove .......................................................... 15
Secure the Bath – Drop-In ......................................................... 16
Make Electrical Connections - Dedicated Circuit Models ................................... 17
Install the Drain ................................................................. 17
Complete the Finished Wall ........................................................ 18
Confirm Proper Operation .......................................................... 19
Tools and Materials
Before You Begin
CAUTION: Risk of personal injury. Do not select a large rim-mount faucet or large deck-mount
faucet for this product. These faucets may be inadvertently used as a means of support and are not
appropriate or safe for this installation. Select a wall-mount faucet or alternative deck-mount faucet.
CAUTION: Risk of property damage. Use clear 100% silicone sealant to the required areas when
instructed. Do not use latex-based sealant or other caulks. Do not add silicone sealant to any other
areas. The inappropriate type and application of sealant may trap moisture and could result in
mold, leakage, or mildew over the life of the product.
NOTICE: Risk of product damage. Do not lift the bath by the piping or blower. Do not use the piping or
blower for structural support of the bath. Lift the bath by the rim at multiple points.
NOTICE: Risk of product damage. Do not install the bath over open floor joists. The basin area requires
no additional support when the subfloor is level and square with the stud framing. Install the bath on an
adequately supported, level subfloor. Shimming is required if the subfloor is not level.
Plus:
Tin Snips
Clear 100%
Silicone Sealant
• Conventional woodworking
tools and materials
• Drop cloth
• Mortar cement (recommended)
• 1x4s, and 2x4s or 2x6s
• Hole saw
• Galvanized or plated non-tapered
flathead screws
• Furring Strips
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Before You Begin (cont.)
NOTICE: Risk of product damage. Select non-tapered flathead screws that are galvanized or plated,
consulting with local building codes for the required type of coating. The coating on the screws will
eliminate the occurrence of rust marks on your product.
Observe all applicable plumbing, electrical, and building codes.
This drop-in bath is designed for recessed, island, or alcove installations with an apron.
Accessories that require backing or support are not recommended for this installation.
Do not remove the old bath before you unpack and inspect the new unit.
For remodeling installations: (1) Measure the existing framework before removing the existing bath
to make sure that the new bath will fit in the existing framework. (2) Make sure that the drain
outlet and drain line is in the correct location. (3) Do not remove the existing bath until the new
bath is unpacked inspected for shortages or damage. Report any shortages or damage immediately.
Confirm adequate mounting and connection space for the water supply and drain installation.
Keep the liner (provided) in place until construction is complete.
If you encounter any installation or performance problems, please do not hesitate to contact Sterling
at 1-888-STERLING in the USA or 001-877-680-1310 in Mexico.
Sterling reserves the right to make revisions in the design of products without notice, as specified in
the Price Book.
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Roughing-In
ABCDE FG
7726 32″
(813 mm) 32-1/4″ (819 mm) 16″ (406 mm) 10″ (254 mm) 22″ (559 mm) 31-1/4″ (794 mm) 30-1/4″ (768 mm)
Ledger Strip Locations
Recommended Support Clip Location (5 Total)
17"
(432 mm)
Overflow Centerline
A
20-5/16"
(516 mm)
3/16"
(5 mm)
C
Without
Apron 72" (1829 mm)
11-3/4"
(298 mm)
7630, 7631
D
E
8"
(203 mm)
4"
(102 mm) 72-1/8" (1832 mm) Min
72-1/4" (1835 mm) Max
Drain Cutout
14-3/4" (375 mm)
57-3/8" (1457 mm)
28-3/4" (730 mm)
43-3/8" (1102 mm)
11-3/4"
(298 mm)
Ø 2" (51 mm) Drain
F
C
G
18-3/4"
(476 mm)
8-3/4"
(222 mm) C
G
F
E
8"
(203 mm)
4" (102 mm)
Ø 2" (51 mm)
Drain
60-1/8" (1527 mm) Min
60-1/4" (153 mm) Max
Drain Cutout
17" (432 mm)
Overflow Centerline
16" (406 mm)
44" (1118 mm)
30" (762 mm)
60" (1524 mm)
A
8-3/4" (222 mm)
18-3/4" (476 mm)
20-5/16" (516 mm)
C
B
D
B
7726, 7727, 7728
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Roughing-In
(cont.)
7727 36″
(914 mm) 36-1/4″ (921 mm) 18″ (457 mm) 12″ (305 mm) 24″ (610 mm) 35-1/4″ (895 mm) 34-1/4″ (870 mm)
7728 42″
(1067 mm) 42-1/4″ (1073 mm) 21″ (533 mm) 15″ (381 mm) 27″ (686 mm) 41-1/4″ (1048 mm) 40-1/4″ (1022 mm)
7730 36″
(914 mm) N/A 18″ (457 mm) 12″ (305 mm) 24″ (610 mm) 35-1/4″ (895 mm) 34-1/4″ (870 mm)
7731 42″
(1067 mm) N/A 21″ (533 mm) 15″ (381 mm) 27″ (686 mm) 41-1/4″ (1048 mm) 40-1/4″ (1022 mm)
1. Prepare the Site
NOTICE: All dimensions shown in the ″Roughing-In″section are nominal. The stud opening tolerance is
+1/8″(3 mm)/-0. Carefully measure your fixture before determining enclosure size. Some shimming
between the stud frame and the fixture may be required. If a firewall is required, rough-in dimensions will
have to increase according to the thickness of the firewall material. Stud opening dimensions must be
measured toward the exposed side of the wall material. Dimensions given in the rough-in information are
crucial for proper installation. Construct the framing and plumbing accurately.
Plumbing
Install the drain line according to the drain manufacturer’s instructions. Locate the drain line and
trap using the dimensions given in the ″Roughing-In″section.
Subfloor Construction
NOTICE: The bath must be level and resting on its feet. Therefore, constructing a subfloor that is level
and can support the load weight of the bath is crucial.
Floor support under bath
model: 7726 Must provide for a minimum load of: 40 lbs/square foot (197 kg/square meter).
7727 40 lbs/square foot (193 kg/square meter).
7728 39 lbs/square foot (188 kg/square meter).
7730 41 lbs/square foot (200 kg/square meter).
7731 41 lbs/square foot (200 kg/square meter).
Construct a level subfloor made of plywood. If a material other than plywood is used, friction may
cause squeaking over time.
Verify the subfloor is level. If the subfloor is not level, install a mortar cement bed (recommended)
to level the subfloor. Refer to the ″Install a Mortar Cement Bed (recommended)″section.
NOTE: If the subfloor is not level and a mortar cement bed will not be installed, you will be instructed in
the ″Prepare the Bath″section to place a felt pad on the subfloor and add shims underneath the bath to
achieve level.
Framing Considerations
Plan the location of the bath to allow clearance for (1) drainage through the floor joists or slab and
(2) convenient plumbing installation.
Provide access to all plumbing connections to simplify future maintenance. Include access at the
back of the plumbing wall whenever possible.
If a shower door will be installed, refer to the shower door manufacturer’s instructions for any
special framing considerations such as double studding at the front corners of the framing.
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2. Rough-In the Plumbing – Alcove Installations
C
7726 16″(406 mm)
7727 18″(457 mm)
7728 21″(533 mm)
7730 18″(457 mm)
7731 21″(533 mm)
NOTE: If plumbing will be installed on the unfinished stud wall, install the supplies after the bath is
installed.
Position the plumbing according to the roughing-in information. Cap the supplies and check for
leaks.
For above-the-floor drain installations: Cut the hole in the floor for the drain line. For
through-the-floor drain installations: Cut the hole in the floor for the drain assembly. The drain
connection should be made directly under the overflow drain. Leave room to connect the piping.
Install the water supplies according to the faucet manufacturer’s instructions. Cap the supplies and
check for leaks.
Strap the water supply connections to the stud framing.
Install the shower valving according to the manufacturer’s instructions. Do not install the trim at
this time.
Optional
Optional
Blocking
Blocking
Supply Valves
Water Supply
Shower Elbow
24"
(610 mm)
Min
8-3/4" (222 mm) for series 7726, 7727 and 7728
11-3/4" (298 mm) for series 7730 and 7731
C
Sterling 7 1139487-2-H

3. Rough-In the Plumbing – Drop-In Installations
CAUTION: Risk of personal injury. Do not select a large rim-mount faucet or large deck-mount
faucet for this product. These faucets may be inadvertently used as a means of support and are not
appropriate or safe for this installation. Select a wall-mount faucet or alternative deck-mount faucet.
NOTE: Do not install the trim at this time.
Before installing a rim- or deck-mount faucet, measure and cut a piece of 3/4″exterior grade
plywood to act as a support under the bath rim. Cut a piece of plywood large enough to support
the faucet components and extend beyond the area where the faucet will be installed.
Install the water supply pipes at one of the specified faucet locations. Refer to the faucet
manufacturer’s instructions for proper installation.
Strap the supply lines to the stud framing.
Install the valves according to the faucet manufacturer’s instructions.
60" (1524 mm) x
32" (813 mm)
4" (102 mm)
3-1/8"
(79 mm)
3-1/8" (79 mm)
6-1/2"
(165 mm)
17-1/4"
(438 mm)
13"
(330 mm)
12"
(305 mm)
12"
(305 mm)
60" (1524 mm)
x 42" (1067 mm)
60" (1524 mm) x
36" (914 mm)
Install the faucet
to the rim and
plywood according
to the faucet
manufacturer's
instructions.
Faucet Location
Rim
72" (1829 mm) x
42" (1067 mm)
3"
(76 mm)
16"
(406 mm)
27" (686 mm)
72" (1829 mm) x
36" (914 mm)
14-1/2"
(368 mm)
23" (584 mm) 3"
(76 mm)
4" (102 mm)
3-1/8"
(79 mm)
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4. Install a Mortar Cement Bed (recommended)
NOTICE: For best results, we recommend that you install a bed of mortar cement on the subfloor. This
will not only provide solid support, but will also eliminate the potential for movement and noise when in
use.
NOTICE: Use sand mix mortar cement only. Do not use plaster, gypsum cement, drywall compound, or
mortar cement with pebbles/stones for this application. These are not suited for this application and/or
do not provide adequate structural support.
NOTE: The bath supports must rest directly on the subfloor. Constructing a level subfloor is critical for
proper installation.
Install the drain and overflow assembly to the bath according to the drain manufacturer’s
instructions.
Spread a 2″(51 mm) layer of mortar cement on the subfloor, spreading it so that each area of the
bath that will contact the subfloor has mortar cement. Do not spread the mortar cement around the
drain area or where the blower will be located. Allow room for the mortar cement to expand from
the weight of the bath.
Immediately move the bath into position.
Verify that the bath is level and resting on all supports.
Clean the bath to reduce the risk of damaging the surface.
Spread a 2" (51 mm) layer of
mortar cement.
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5. Prepare the Bath – Alcove Installations
Series G
7726 30-1/4″(768 mm)
7727 34-1/4″(870 mm)
7728 40-1/4″(1022 mm)
7730 34-1/4″(870 mm)
7731 40-1/4″(1022 mm)
If a mortar cement bed was not installed, align the drain hole in the felt pad with the drain hole in
the subfloor. Secure the felt pad into place with fasteners (such as staples or nails).
Install the drain and overflow assembly to the bath according to the drain manufacturer’s
instructions.
Dry fit the bath.
Verify that the bath is level. If the subfloor is not level, insert shims under the bath to adjust for
level.
Mark the height of the bath flange on each stud wall. Set the bath aside.
Measure and mark 1-9/16″(40 mm) down from the first mark.
Cut two ledger strips from 1x4 material to the length specified in dimension ″G.″Cut a third ledger
strip to fit the remaining width of the stud pocket.
Install the ledger strips.
Dry fit the bath again to make sure the bath is not being supported by the rim. If needed, remove
the ledger strips, slightly lower them, then reinstall.
Remove the bath.
Stud
Studs
Verify level.
Ledger Strip
Ledger Strips
G
1-9/16" (40 mm)
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