Instructions / Assembly

esigned for use on 3/4” PVC conden-
sate drain line, the SOS snaps easily
over existing drain line tubing and can be glued
in place using PVC cement.
The SOS electronically senses water near the
inside wall of the PVC drain tubing. By locating
the SOS with its body away from the normal
flow, it can detect a possible overflow condi-
tion when the PVC drain line becomes full with
water. Like a culvert, a condensate drain line is
normally mostly empty with a small amount of
water flowing in the lower parts of the horizontal
run. Since the SOS’s sensor com ponent only
covers part of the tubing, a low volume of flow-
ing water does not activate the switch. The pipe
must be full or near full to activate the switch.
The SOS can be mounted horizontally, vertically,
or at any angle.
The SOS works with 24 VAC control circuits and
typical contractors. When not detecting water,
it is normally closed and allows normal air
conditioner operation. When water nears the
SOS’s sensor, the switch triggers and the control
circuit is opened. Then, the LED indicator lights
to show that there may be system trouble.
Furnished complete with switch, 5’ (1.5 meter)
18 AWG, 2 wire lead, and
a 3/4” PVC male
fitting adapter for direct
coupling to a primary
pan drain line connection.
What is the
Safety Overflow
Switch (SOS
™
)?
D
• SOS electronically senses water in the PVC drain tubing.
• SOS is designed for use on 3/4” PVC condensate drain line.
• SOS snaps easily over existing drain line tubing.
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Furnished with a tube
adapter for direct
connection to a
secondary port.
800.995.2222
6
7
www.diversitech.com
Safety Overflow Switch (SOS™)