Installation Guide
2023.03.07
Ø 6-7”
TRENCH DRAIN
1/2” DEEP
MORTAR BED
SUBTRACT 1/2” FROM DEEPEST RIB
MEASURED IN STEP 4
1. Frame out shower stall area to shower pan dimensions. The bore hole
needs to be a minimum 6”, but not more than 7” diameter opening*.
Ensure that the shower pan subfloor is level, and that the walls are level,
plumb, and square. Place the square in corners to ensure they are square
and straight. All walls and framing must be plumb prior to proceeding. The
floor must be level within 3/8”. Sweep up any debris from subfloor.
Redi Free® Installation: For a proper barrier free pan installation, subfloor
must be recessed (in accordance with local codes) to the depth of the
front lip of pan. Waterproof the seam between shower pan and subfloor
with a waterproofing tape and a liquid-applied membrane.
4. Turn the shower pan over and note that there are ribs under the shower
pan floor. To calculate the amount of mortar needed, you will need to
know the depth of the deepest point in between the ribs. Once you have
that value, calculate the thickness (depth) of your mortar base (Type N or
S Mortar) using the following formula:
Redi Base® / Redi Free® (Non-Trench) Pans: (Left or Right Drain ONLY)
Subtract 1/4” from deepest rib measured in Step 4.
Redi Base® / Wonder Drain® / Redi Free® (Non-Trench) Pans (Center Drain
ONLY): Subtract 1/8” from deepest rib measured, PROVIDED that the
mortar base should always be at least 1/2”.
Redi Trench® / WonderFall Trench® / Redi Free® Trench Pans:
See Step 4 image for mortar thickness for Trench pans.
DO NOT PLACE THE MORTAR DIRECTLY ON A WOOD OR GYP
CRETE SUBSTRATE. FIRST, WATERPROOF THE WOOD SUBSTRATE
WITH A FLUID APPLIED WATERPROOFING MEMBRANE, OR NO.
OR NO. ROOFING PAPER SO THE WOOD DOES NOT ABSORB THE
WATER FROM THE MORTAR.
2. To ensure a perfect fit, test fit shower pan drain housing into subfloor
bore hole. Make sure the shower pan is aligned properly and fits snuggly
against the shower frame studs on all sides and corners. Ensure that the
pan is level on the floor. There should be no movement or bulge.
DO NOT NAIL OR SCREW INTO THE PAN. DO NOT SAND, CUT, OR
MAKE ANY CHANGES/MODIFICATIONS TO THE SURFACE OF THE
SHOWER PAN WHATSOEVER.
3. This step depends on whether there is access to the drain connection
from below the subfloor:
a. If there is access from the subfloor below, then cut a section of drain
pipe (PVC, as applicable to the type of drain) which is long enough to
extend below the subfloor and easily make a connection to the waste
water pipe.
b. If there is no access from the subfloor below, then make sure
the drain pipe stubbed up from the subfloor is adjusted to a height
suicient to fit properly into the shower pan drain connection.
*Creating a bore hole larger than 7” would void any warranty.
WASTE WATER PIPE