PRO-ECO-LITE (tm) COMPOSITE HEADWALL STRUCTURES
Canada Patented - US Patent Nos: D477,543 - D477,544
US Patent Pending

HEADWALL INSTALLATION TEXT
PRE-INSTALLATION

a. Soil, ground and drainage conditions vary by region. Installation and ground conditions and
backfill materials must be confirmed by site engineer and or conform to the local municipal
specifications.

b. An apron is not required in most installations. In some areas a site engineer may require
an apron to be installed to improve anchorage in poor ground conditions or steep slopes
where high volume water may be common.

c. Prior to ordering refer to 'Installation Drawing'. Check the headwall offset and ditch depth to
ensure bank slopes are within retention units of the headwall.

d. Correct installation procedures are essential to maintain proven static loading limits and
performance. Refer to 'Installation Drawing'.

APRON

a. Pre try assembly of apron to headwall. Check location of invert from apron base.
b. Install apron so headwall spigot invert when installed will match pipe invert.
c. Compact to 95% Proctor density
d. Use s/s fasteners (as provided) to fasten apron to the headwall base flange.

XPORTtm INSERT
a. Prior to headwall installation fasten XPORTtm insert to headwall by the following method.
b. Apply a generous amount of silicone sealant to mating flange of XPORT tm insert flange.
c. Install XPORT tm insert into PRO-ECO-LITE tm headwall, ensure correct invert position.
Install s/s fasteners and washers through front face and fasten nuts on the backside. Torque
every second nut to ensure proper and even seating of spigot flange.
d. Run a final bead of silicone around face of insert joint to complete seal.

CORRECT INSTALLATION for ALL HEADWALLS INCLUDING BOTH ENVIRO-CONNECTtm
and FRP male universal spigot.

1. Some contractors prefer to make pipe connection prior to installing headwall into ditch.
This is sometimes preferred where running water exists in the ditch, as the water flow will be
uninterrupted during backfill. Note: Make sure weight of headwall is carried by lifting sling
and not the pipe if this method is used.

2. If an apron is used it must be installed, backfilled and fully compacted prior to installation of
the headwall.

3. ENVIRO-CONNECTtm CONNECTION - Using pipe manufacturers coupling
a. Sometimes it is easier to line up the two pipe ends if the lower half of the coupling is
placed under the ditch pipe. This allows the headwall to drop into the receiving coupling
(ignore this if Item 3. method is used).
b. Lower headwall into ditch manually or sling through tie down ribs in the backside of
headwall and lift into place mechanically.
c. After lining up pipe ends place top part of coupling in place and fasten as per manufacturer
recommendations.

4. FRP SPIGOT CONNECTION (requires mechanical fastening)
a. Lower headwall into ditch and position FRP spigot into receiving pipe.
b. Pack foam-backing rod into cavity on the inside between pipe and spigot.
c. Drill 4 holes to mechanically fasten headwall with 3/8" s/s fastener c/w washers.
d. Drill one 3/8" hole in bottom of pipe and another hole in top of pipe in the joint cavity.
e. Inject expandable mono foam into cavity at lower hole until foam appears out of upper hole.
Connection is now complete. (Alternate - Fill cavity with epoxy or acrylic modified grout).

5. The ground must be well drained with a solid compacted base. Coarse, flowable sand is
recommended for backfill in 12" lifts and foot compacted solid before continuing. Backfill
must be fully compacted to top level of installation area.

6. Riprap may be placed on bank slopes to ensure slope retention in unstable ground
conditions. A thin layer of topsoil and hydra seed or sod can be added if desired.

7. Riprap may be placed on front bottom plate of headwall to provide a more natural habitat for
fish or other wildlife. The riprap will also provide additional stability to ditch base to prevent
undermining of the headwall. If stream flow is excessive further precautions against
undermining can be accomplished by adding an apron to the headwall base.

8. The performance of this product is directly related to the variety of applications, installation
methods and conditions. The above installation procedures are generic and local ground and
site conditions may dictate necessary changes - consult site engineer for necessary
changes.

9. The product is designed for occasional traffic loads, and it is not recommended for use on
roads, service roads or driveways where maximum loads are not known. We recommend
placing of the headwall on the bank slope or widening of the driveway to avoid damage from
unknown traffic loading. The headwall is designed and tested to withstand a 20,000 lb. static
load when fully back filled.

10. Visual staking is recommended to prevent damage until site work is complete.