Installation Instructions

INSPECTOR GUIDE
Form-A-Drain performs multiple purposes:
footing form, drainage system and radon reduction system.
OUTLET
CROSSOVER
CORNER
COUPLING
DUAL
OUTLET
OUTLET
OUTLET
DUAL
OUTLET
TO
DAYLIGHT
TO SUMP
PUMP
CROSSOVER
CROSSOVER
RADON OUTLET
PVC TEE
PVC HORIZONTAL
PIPE
Use option A or B
to discharge water
toward desired
destination, based
on local practice
and site conditions.
The outer and inner
lineals may also be
individually drained
(no crossover).
Option B
Option A
Properly Positioned
for Radon
Properly Positioned
for Drainage
FIGURE 1
OUTLET POSITIONING
Improperly installed
Properly installed — Level
FIGURE 2
CROSSOVER DRAINAGE
TYPES OF CROSSOVERS
NOT ALL TYPES REQUIRED — REFER TO LOCAL BUILDING CODES
1. Lineals must be installed with the water intake slots facing
toward the gravel, away from the footing .
2. Drainage outlet adapters must be installed with the round
adapter positioned at the bottom of the fitting (Figure 1).
3. In situations where only one-sided drainage is accepted,
FAD may be used together with wood or other solid forms.
Follow installation instructions to form either the inside
or outside with lineals, and use solid forms for the
opposite side.
4. In installations using crossovers, a minimum of 12 square
inches of crossover drainage area is required. This can be
accomplished with corrugated drain tile attached to
Form-A-Drain Outlet Adapters or Outlet Fittings. Crossovers
can also be made using rigid PVC pipe(s) (see Drainage,
Page 4). Crossover installations must be level (Figure 2).
An alternative to the crossover is to drain the inside system
to a sump pit and the outside system to daylight (drainfield).
5. The transfer pipe leading to the sump pit or daylight should
be 4" in diameter; otherwise, the overall carrying capacity of
the system will be affected accordingly.
6. Should lineals become damaged or cracked, repair of lineals
can be accomplished through one of the following methods:
■ A crack smaller than slot width — do not attempt to
repair, this is insignificant.
■ A crack that might restrict drainage flow or allow stone
and dirt to enter — remove small broken piece and cover
open area with duct tape prior to backfill.
■ A crack with large opening — cut out the damaged
section and replace using a small piece of lineal, which
is staked in line using a matching length of lineal. This
will not affect the integrity of the drainage system. Cover
broken area by using a coupling with one side cut out.
7. The FAD system must be installed level.
8. The FAD system must be backfilled with the appropriate
gravel or stone in compliance with code requirements.
9. As with any foundation drainage system, roof runoff
downspouts or rain gutters must not be connected into
the system. If required, window wells may be drained into
gravel or stone adjacent to FAD, or can be hard-connected
to FAD via use of a downspout adaptor.
10. Local codes may call for a filter fabric/geotextile screen to be
used in conjunction with the foundation drainage system .
It is possible that changes in the sequence of
inspections may be required. Stone should be
placed in the same manner as current practice.
Filter fabric should be used in accordance with
local codes and practices, as required. FAD is
the subject of ICC-ES Legacy Report Number
95-37-01, renewed every two years. FAD is also
subject to CCMC report 13492-R.
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