Installation Instructions

www.prosourcecenter.com
Rev 5/30/2019
6. Test Fit drain flange directly to subfloor and measure distance to 2” diameter waste
pipe fitting under subfloor. Cut and test the proper length coupler pipe that will attach
flange to waste pipe but still allow the flange direct support at the subfloor. The top of
the 2” pipe coupler should come to about 1-1/2” below the top of the subfloor (and
sleeves inside drain outlet.) Ensure a successful dry fitting so that these will later glue
together correctly
5. The current pan can accommodate a variety of drain flanges including
those that are only supported by the pan pocket. Your drain pan is usually
precut at the warehouse to accommodate the much stronger GEN II drain
flange. However if it is not, trim the inside of the pan drain opening to allow
for a snug fit of the flange. It should dry fit as seen from the bottom of the
pan in this photo.
7. Using a 1/4” x 1/4” trowel, apply thin-set onto the entire
subfloor in the pan area AND to the back of the pan
(back-butter.) Although less thin-set may offer a
sufficient bond, insufficient thin-set will likely create a
scenario where the drain flange sits up too high (out of
the "pocket".
It is desirable for the flange to have full support at the base
on the subfloor unlike other designs that only have support
from a larger flimsy flange. Press the first pan section firmly
into the thinset mortar. Repeat until all sections are installed
into the desired pan area. Walk over the pan sections to help
ensure that each piece is fully embedded into the thin-set
mortar.
8. If you have constructed your own curb, ensure that
it is sheeted with a rigid material like concrete board
or sheetrock. If you purchased the optional foam
curb, test fit your curb sections and trim as neces-
sary to fit the desired space. Mark the location of
your curb(s) and trowel notched thin-set mortar into
the curb seating areas. Additionally back-butter the
ends, sides and bottom of each curb section. If you
purchased a curb, you should automatically have
received outside corners to be installed during the
waterproofing phase.