Paramount MDX Manual Del Usuario página 10

SDX CONCRETE INSTALLATION
The SDX High Flow Safety Drain
concrete shell utilizes a small cutout in the concrete to
form the sump which is sometimes made of plastic or
fiberglass. This concrete sump provides superior shell
strength by eliminating the large hole associated with
plastic sumps. The water seal is formed against the
suction pipe in the same way a water tight seal is
formed with return pipes. The concrete cutout is
typically eleven inches (11") wide, by two (2) inches
deep, with a finger size cutout around the pipe to allow
room for a watertight seal. ( Fig. 4 )
Rebar Steel ( Fig. 6 )
Concrete reinforcing steel should be kept 3" away from
all pipe and fittings.
Concrete Shell Sump ( Fig. 4 )
Form a concrete sump around each suction pipe.
Concrete Shell Preparation ( Fig. 5 )
Prior to installing the interior finish, cut each SDX riser
pipe approximately 1" behind the concrete shell's
surface.
Note: Suction Safety Standards require that main drain
grates used to cover concrete sumps, must have the
suction pipe cut at least 1½ times the pipe diameter
behind the drain cover. This is to allow room for even
water flow through all drain cover holes. This is not
necessary with the SDX drain because the Patent
Pending design provides uniform suction regardless of
pipe location. However, if the pipe is too close to the
surface, it may restrict water flow to the pump, reducing
hydraulic efficiency, but this does not pose a suction
safety hazard.
TM installed in a
Fig. 4
Fig. 5
1" Deep (typ)
8
2" Deep (typ)
Finger Size
Cutout