Drain Line And Overflow Connection - Maytag ST Series Operation Manual

Drain Line and Overflow Connection

Drain Line Connection Drain Line Connection
NOTE: Standard commercial practices are expressed
here. Local codes may require changes to the following
suggestions. Check with local authorities before install-
ing a system.
1. The unit should be above and not more than 40 feet
(12.2 m) from the drain. The drain line flow control
can be installed with the standard 3/4" NPT (1.9 cm)
drain line elbow, which accommodates 3/4" NPT (1.9
cm) drain line or the optional nut and poly tube insert
which can be used with a 5/8" O.D. (1.59 cm) flexible
poly tube drain line connection. Use thread seal tape
when using the 3/4" NPT (1.9 cm) to connect to PVC
or CPVC pipe to the drain line connection of the con-
trol valve. The drain line flow control can be rotated
180 degrees so the drain lince can be orientated to
the nearest drain.
2. If the backwash flow rate exceeds 7 gpm (26.5 Lpm)
or if the unit is located more than 40 feet (12.2 m)
from drain, use ¾" (1.9 cm) tubing, PVC or CPVC
pipe. Use an appropriate fitting to connect the ¾"
(1.9 cm) tubing, PVC or CPVC pipe to the drain con-
nection of the control valve.
3. The drain line may be elevated up to 6 feet (1.8 m)
providing the run does not exceed 40 feet (12.2 m)
and water pressure at the system is not less than 40
psi (2.76 bar). Elevation can increase by 2 feet (61
cm) for each additional 10 psi (.69 bar) of water
pressure at the drain connector.
4. Where the drain line is elevated but empties into a
drain below the level of the control valve, form a 7"
(17.7 cm) loop at the far end of the line o that the bot-
tom of the loop is level with the drain line connection.
This will provide an adequate siphon trap. Tie or wire
the hose in place at the drain point. Also provide an
air gap of at least 1-1/2" (3.8 cm) between the end of
the hose and the drain point.
5. Where the drain empties into an overhead sewer
line, a sink-type trap must be used.
6. Secure the end of the drain line to avoid it from mov-
ing.
14
Figure 19
Secure Drain Line
Overflow Line Connection
In the event of a malfunction, the brine (regenerant) tank
overflow will direct "overflow" to the drain instead of spill-
ing on the floor. This fitting will be located under the brine
line tubing hole on the side of the brine tank.
To connect the overflow line, locate overflow fitting on
side of brine tank. Slide one end of the 5/8" O.D. (1.59
cm) overflow line over the barbed end of the overflow
fitting approximately ¾" (1.9 cm), then run the other end
of the overflow line to the drain. Do not elevate overflow
line higher than overflow fitting.
(See Figure 20)
Drain Tubing sold separately in 100 ft rolls
(Part No. 3PET58100B).
NOTE: Do not tie into drain line of system. Overflow
line must be a direct, separate line from overflow fitting
to drain, sewer or tub. Allow an air gap as per drain line
instructions.
1. Overflow Fitting
2. Drain Tubing
3. Secure hose in place
Brine Tank with Overflow Fitting
1
1
2
2
1. Air Gap
2. Drain
1
Over ow Fitting
2
Drain Tubing
3
Secure hose in place
4
Air Gap
5
Drain
4. Air Gag
5. Drain
Figure 20