SDX2 is a circulation drain, not intended to remove debris. For this reason it is suggested SDX2 be
installed on walls whenever possible. SDX2 is a high fl ow safety drain system submerged suction
outlet suitable for single or multiple drain use on the wall and floor. This is to keep debris and sand
from collecting on and around the low velocity SDX2 cover. Do not locate suction outlets on seating
areas or on the backrest of such seating areas.
CAUTION
- Drain covers deteriorate over time due to exposure to sunlight and pool chemi-
cals and must be replaced every five (5) years from installation (or earlier if the cover or grate
becomes damaged in any way).
NOTICE
- Some covers and grates are incompatible with other manufacturers’ frames and
the existing frame must first be removed and a new supplied frame installed.
WARNING
- The maximum flow rate for each pair of SDX2 drains varies depending on size
and orientation of pipe and location on wall or floor. See chart below for flow limits based on
variables. Any modification that increases the flow rate of the circulation system shall require
reevaluation of the cover/grate and sump to ensure that the flow rating of the Suction Outlet
Fitting Assembly (SOFA) is not exceeded. Compliance with this standard requires that these SO-
FA-configuration specific flow ratings NOT be exceeded at any time the pool is open to bathers.
Compliance with this standard requires selecting and installing a SOFA, or combination of SO-
FAs, such that the resulting individual suction system flow rating is greater than the pumping
system’s maximum system flow rate.
The velocity at the opening to the SDX2 drain at the system flow is equal to gpm/134.648=(X)FPS.
For multiple drain systems where more than two drains are used, the maximum flow rate is calcu-
lated per ANSI/APSP-7 Section 4.6 as shown in the following chart.
SOFA SDX2 FLOW RATINGS
Flow
Rating
(GPM)
Pipe Size
Pipe Port
Orientation
Drain
Mounting
Orientation
Flow
Rating
(GPM)
Pipe Size
Pipe Port
Orientation
Drain
Mounting
Orientation
180
3"
Side
Floor
140
3"
Side
Wall
116
2.5"
Side
Floor
108
2.5"
Side
Wall
100
2"
Side
Floor
100
2"
Side
Wall
60
1.5"
Side
Floor
60
1.5"
Side
Wall
178
3"
Bottom
Floor
140
3"
Bottom
Wall
120
2.5"
Bottom
Floor
108
2.5"
Bottom
Wall
100
2"
Bottom
Floor
100
2"
Bottom
Wall
60
1.5"
Bottom
Floor
60
1.5"
Bottom
Wall
!
!
USE ONLY PARAMOUNT GENUINE REPLACEMENT PARTS
6
USE ONLY PARAMOUNT GENUINE REPLACEMENT PARTS
