Hilti CP681 INSTALLATION

Installation Instructions for CP 681 Tub Box Kit

CONCRETE ON WOOD FORM FOR FLOORS Refer to Hilti product literature and the latest UL Fire Resistance Directory details. Do not use for wall applications.

Secure the coupling sleeve
flange (the larger of the three
flanges) to the floor deck using
nails or screws.

Using standard solvent cement on
both plastic surfaces, assemble the
CP 681 Tub Box legs and sleeve to
bottom of the Tub Box as follows:

• Cement the two 3/4" PVC
stabilizing legs to the matching
connecting area on the bottom
side of the CP 681 Tub Box.

• Cement the CP 681 Tub Box and
larger PVC plastic sleeve to the
connecting area on the bottom
side of the CP 681 Tub Box.

• Secure the smaller leg flanges
to the deck using nails or screws.

Pour concrete to the proper

CP 681

height.
assembly is precut to the
slab thickness.

Tub Box

After concrete is cured, remove
the floor deck and foam insert.
Remove pressure test cap
before installing drain piping.

Install the tub drain/overflow
assembly piping (plastic or brass)
through the CP 681 Tub Box and
plastic coupling. Insert proper
elastomeric bushing into the
bottom or top of the CP 681
Tub Box assembly around the
drain pipe.
Note: Install bushing before final
drain/overflow assembly if
installing from the top side.
Complete the installation by
installing branch and trap piping.