Linear Drain Guide
The particulars of any drain installation depend on a number of variables: site conditions,
waterproofing, and type of install. Whether it is a barrier threshold (curb), or barrier free (curbless/zero
threshold) installation, Infinity Drain has provided general guidelines below to assist in determining
the correct product choice for your project. Always use a licensed professional when installing our
products. Please contact us with questions regarding your specific installation.
Site Conditions:
Whether it is a renovation or new construction, choosing where to locate a linear drain is contingent on
the waste line location, which may be predetermined or already installed. Moving a waste line may be
possible, depending on site conditions. Infinity Drain’s Site Sizeable (S) Series provides flexibility during
the installation process by allowing the outlet to be placed anywhere along the channel run. Always
consult with a licensed professional.
Locating Linear Drains
A linear drain allows for the use of larger format floor tile and the ability to pitch the floor in one direction.
This offers an advantage from the traditional center drain installation, where the floor must slope in four
directions in order to properly drain the water.
Fig. 1
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Linear Drain Guide
TYPE OF INSTALL:
Wall-to-Wall (Fig 2 and 3)
One way to ensure proper drainage is to install the linear
drain from wall-to-wall. The challenge of this installation
is that it requires an exact dimension. Infinity Drain offers
a solution to this issue with the Site Sizeable (S) Series,
which allows for ”site sizing” the length of the drain by
cutting the grate and channel to the exact finished wallto-wall dimension. Infinity Drain’s FX, FF, & FT series can
be custom fabricated for the exact desired length and
outlet location.
Against a Wall (length of drain) (Fig 4)
Infinity Drain’s Fixed Flange (FF, bottom outlet and Side
Outlet FT, horizontal or side outlet) Series are designed
for flush
intended for use with liquid or fabric type waterproofing
to tie into the wall board. They are available with a center
outlet location and in set lengths of 24”, 32”, 36”, 42”, 48”,
and 60.” Custom sizes and outlet locations are available.
against the wall
installations. These series are
Fig 2
S-AS 65 finished wall-to-wall with build out.
The (S) Site Sizeable and Fixed (FX) Series require a
traditional clamping drain body for PVC Liner, Chloroloy,
Lead Pan, Copper, Fiberglass, and Hot Mop type
waterproofing. The diameter of the clamp down drain body
creates a challenge for flush
using these series Infinity Drain recommends three options
to help properly achieve
1. Install a strip of flooring material between the drain
and wall.
2. Build out the back wall with a double layer of wall
board.
3. Use the FF or FT series for exact against the wall
installation.
Curb or Curbless (Fig 4, 5, and 6)
Deciding between a barrier threshold (curb) or barrier
free (curbless) installation is critical when a linear drain is
being considered. Please consult a licensed professional
when determining which installation is possible. Please see
Barrier Free on next page for more information.
against the wall
against the wall
installations. If
installations:
Fig 3
S-AG 38 installed NOT wall-to-wall. If
the drain does not finish wall-to-wall
the remaining area must have flooring
material on either side and have pitch
back to the drain.
Fig 4
Against the wall installation with the FFAS
65 series.
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TYPE OF INSTALL (cont.):
Threshold Installation (Fig 5 and 6)
For threshold installs, we recommend the drain run exactly
wall-to-wall to block any water from leaving the shower
or wet area. We do not recommend thinner or tile-in type
drains for threshold installations due to the lack of channel
width needed to sufficiently catch the water.
Infinity Drain Series that are
NOT recommended for threshold installation:
Linear Drain Guide
•S-AG38 •FFDG25
•S-DG38 •FFAS25
•S-TIFAS65 •FFTIF65
•S-TIF65 •FTED25
•S-TIFAS99 •FTDG25
•FXTIF65 •FTAS25
•FFED25 •FTTIF65
Barrier Free Installation (Fig 5 and 6)
Installing a shower drain without a curb, barrier, or
threshold creates a seamless look with easy accessibility to
the wet area. To achieve an ideal installation, floor heights
should be equal between the shower area (wet area),
outside the shower (dry area), and next room. Specific
conditions will determine what is involved. The FF and
FT offer the lowest overall heights (1 1/16” and 1 3/16”).
In addition, we offer a product (ST 65 - pg 76) to allow
channel to recess into subfloor an additional ¾” leaving
total height at 5/16”. The dry side of the shower should
have a slight pitch towards the linear system to ensure
proper drainage. The entire wet and dry floor area should
be waterproofed. Infinity Drain recommends working with
a licensed professional who is familiar with local codes and
installation requirements.
Center Pitch Installation (Fig 7)
A center pitch installation places the drain in the middle
of the wet area. The floor is pitched in four directions
towards the drain. The type of waterproofing used is
either the traditional method with a clamp down floor
drain, like Infinity Drain’s TD Series or a liquid/fabric sheet
membrane with a Bonded Flange drain body, like Infinity
Drain’s TDB Series.
Fig 5
Threshold installation using the S-AS 65
demonstrates an exact wall-to-wall barrier
free installation.
Fig 6
Threshold Installation FFED 65 where
the entire bathroom is waterproofed.
The dry side is slightly pitched towards
the linear drain.
Fig 7
Tile Drain Series: Center Pitch Installation
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Linear Drain Guide
Recommended Bathroom Layouts
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Linear Drain Guide
Flow Rates:
There are many variables that influence flow rates and how drains perform. Our listed GPM (gallons per
minute) on Infinity Drain products are based on having a ”head of water” that is traveling a ½” high. Different
head heights will change flow rate. Without calculating a specific install, use our flow rate as a general
guideline. The following variables below should be considered when choosing and locating a linear drain.
Variables to consider:
What is flow rate of the shower valve? (i.e. how much water is being drained?)
Are there multiple shower valves?
What is the water pressure or PSI of the site location?
How many water features? (i.e. showerheads, hand shower, body sprays, etc.?)
Will the fixtures operate at the local plumbing code’s legal gallons per minute?
Will the flow restrictors be removed from the fixtures?
The answers to the above questions fall into the equation of determining the proper type of drain, outlets
necessary, and location of the drain. These variables can vary drastically from installation to installation,
and because of this, it is difficult to have an absolute flow rate. Most US residential installations use a 2”
waste line, which has an average capacity of 9 GPM at ½” head of water, assuming proper venting. Adding
additional 2” outlets and tying them to a 3” waste line will significantly increase the flow rate to 21 GPM.
Infinity Drain’s 3” outlet products have an average capacity of 21 GPM.
Infinity Drain products that achieve a higher flow rate without adding a second outlet:
S-DGAS99 S-TIFAS99 S-AS99
FX125 FF125 TD20-3
Outlets:
Infinity Drain products are intended for both indoor and outdoor use. For indoor installations, we
recommend an outlet every 30”. For example, on a 60” length drain, if the outlet is centered, it is
considered to have 30” on either side. In the same example, if the outlet is offset 5” to one side, we
would recommend a secondary outlet, especially for a threshold installation. Our 72”, 80”, and 96” kits
come standard with two outlet assemblies. Site Sizeable (S) Series can add additional outlet components
to the kit. We can custom fabricate the FX, FF, and FT linear drain series with multiple outlets. Outdoor
installations: Outlet frequency is dependent on drain application and geographic location. Please contact
us with questions regarding your specific installation.
Waterproofing:
The type of waterproofing can help determine which linear drain series (S, FX, FF, FT) to specify. If using a
traditional type of waterproofing, the professional will typically build a shower pan (wet waterproofed area)
with PVC, Vinyl, Lead, Hot Mop, Copper or Fiberglass material. Infinity Drain’s S, FX, and TD Series are
recommended. If using a modern type of waterproofing such as liquid or a fabric install, the professional
can more easily waterproof over a greater floor area to build a barrier free or zero threshold installation.
Infinity Drain’s FF, FT, and TDB Series are recommended for this type of waterproofing.
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Linear Drain Guide
Waterproofing
Commonmethodsusingaclampdownoordrain:
PVC Membrane/Vinyl Liner (Polyvinyl Chloride): A plastic sheet
available at most plumbing suppliers and sold in rolls of 4’, 5’ and 6’. The
membrane is layered between mortar beds and the corners are folded
to create the shower pan liner. If the shower pan area is larger than the
roll dimension, it must be seamed or joined together. Tile cannot bond
directly to this type of waterproofing.
Lead Pan/Copper Pan: A metal sheet that is formed to create the shower
pan area. The membrane is layered between mortar beds and the corners
are folded to create the shower pan liner. If the shower pan area is larger
than the sheet dimension, the lead material must be welded together. This
install is more common in metropolitan areas where code may require a
metal pan. Tile cannot bond directly waterproofing.
CPE Membrane (Chlorinated Polyethylene): A rubber sheet available
at most plumbing suppliers and sold in rolls 4’, 5’ and 6’. The membrane
is layered between mortar beds and corners are folded to create the
shower pan liner. If the shower pan area is larger than the roll dimension,
it must be seamed or joined together. Tile cannot bond directly to
waterproofing. CPE Membrane is also branded as Chloraloy™ by Noble.
Hot Mop (Tar): Heated liquid tar is applied or ”mopped” on the
shower area to create the shower pan and is similar to waterproofing a
roof with tar. This installation is most common in California. Similar to
fiberglass waterproofing.
Methodsusingabondedange:
Liquid: Roll or paint-on liquid membrane that can be applied on
floors, walls, and ceilings and bonds directly to the drain flange. The
total install time is shorter than traditional waterproofing methods
and typically saves 2 to 3 days. Infinity Drain recommends and offers
HydrobanTM waterproofing by LaticreteTM. HydrobanTM is a self-curing
product that is ready for flood testing in 2 to 5 hours. Tile can bond
directly to waterproofing.
Fabric Sheet: Sheet membrane that bonds directly to the drain flange
with an adhesive and is sold in most tile suppliers. Corners (in and out)
are available to avoid folding. If the shower pan area is larger than the
roll dimensions, it must be seamed or joined together. Tile can bond
directly to waterproofing.
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Linear Drain Guide
Care & Maintenance:
Infinity Drain’s stainless steel linear drain top grates are made of 304 or 316 stainless steel depending
on components and Series. This material is non-porous, hygienic, rust-free and extremely durable. Bar
Keepers Friend
your Satin Stainless drain cover. For Polished Stainless, Matte White, Matte Black, and Oil Rubbed Bronze
we recommend a mild soap and a soft cloth for cleaning. DO NOT use any abrasive cleaners, scrub pads
or allow household cleaning agents, such as bleach, sit on your drain cover for a long period of time.
Stainless steel does not rust. External factors may have caused ”surface” rust which can be removed using
Barkeepers Friend® or Soft Scrub® with Bleach. Always follow the directions on the bottle.
®
and Soft Scrub® are commonly available products that can be used to protect and clean
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