General Guidelines - MTI Designer Series Installation And Operation Manual

Installation and Operational
General Installation Guidelines
Measure actual tub prior to building any structure(s) for the tub. All printed specifications for MTI tubs have ± ½" tolerance and are subject
to change at any time. MTI Baths, Inc. is not responsible for any preparatory labor or material charges. Additional access to plumbing
fixtures is strongly recommended. It is the responsibility of the installer to provide access to pump and plumbing in compliance with local
plumbing codes.
Important Tub Measurements
C
D
½"–1"
wet bedding compound
2"–3"
End Drain
Some installations may require different methods than the following instructions. However, framing should always provide a level surface
for the rim of the tub in both directions and sufficient space for bedding compound underneath the full length of the tub (G). Never let the
rim of the tub bear the weight of the tub.
MTI tubs are not equipped with leveling feet. MTI recommends Quikrete #1103 sand/topping mix or equivalent as bedding compound.
Plaster, spray foam, nor sheet rock mud are NOT sufficient bedding compounds and may void warranty.
NOTE: Airbaths and tubs equipped with optional pre-leveled frame and foam base negate the need to wet bed when installing on a flat
and level surface. Foam base adds 2"-3" to the overall height of the tub (F).
IMPORTANT: Plan for access to each pump, blower and/or electrical component. DO NOT allow any material such as insulation within
8" of pump. Pump and blower must have sufficient air space surrounding them for circulation.
Alcove / Skirted Tub Installation
1. Level tub at the rim in both directions (front-to-back and side-to-side),
leaving 1/2"-1" void under tub for bedding compound.
2. Mark level line on stud walls at tub height (C).
3. Install top of stringer at the marked line. Construct frame across the
front of the tub at the same height as the stingers for skirt, tile or other
material.
4. Install drain components per manufacturer's instructions. General
drain installation guidelines can be found in this manual on pg. 11.
5. Prepare wet bed, unless tub is equipped with optional factory-installed
foam base and is being installed on a flat and level surface (a small
amount of thin-set is recommended to level uneven floor).
6. Before bedding sets, carefully work tub into it, shifting side-to-side,
until tub is in planned level position. Use care not to damage any
plumbing, electrical components or wiring when moving and bedding
the tub. NOTE: Tub will not drain properly if not leveled at the rim.
7. Drill 1/8" pilot holes through the tile flange at each stud location. Shim
as needed. Secure tile flange to stud wall with screws. DO NOT use
nails.
1 MTI will not be responsible for any costs involved with removing or reinstalling the tub due to leaks associated with improper drain or valve installation.
² Failure to check floor for flat and level surface could result in improper drainage of the bath.
³ It is the responsibility of the installer to comply with local plumbing codes regarding backflow prevention.
16 / mtibaths.com
Manual •
A
B
E
G
Collection •
Designer Whirlpool and Airbaths
C
D
F
½"–1"
2"–3"
A
G
wet bedding compound
Center Drain
Leveling Stringers
Provide an opening of
at least 16" x 14" for pump access.
MTI's optional skirts will often
provide this access.
Backer Board
Tile
Tile Flange
W
W Caulk A
L
A
L
L Tub Deck
L
Silicone
B
E
F
Backer Board
Tile
Integral Tile Flange
Inside Tub Wall
Tub Deck