Drain Line Connection - Pentair AUTOTROL 604 Installer Manual

Installer Manual Autotrol 368 / 604-606 - Installation
5.9.

Drain line connection

A
Note
Standard commercial practices are expressed here. Local codes may require changes to
the following suggestions. Check with local authorities before installing a system.
The unit should be above and not more than 6.1 m from the drain. Use an appropriate adapter fitting
to connect 12.7 mm (1/2") plastic tubing to the drain line connection of the control valve.
If the unit is located 6.1-12.2 m from the drain, use 19 mm (3/4") tubing. Use appropriate fittings to
connect the 19 mm (3/4") tubing to the 19 mm (3/4") NPT drain connection on the valve.
The drain line may be elevated up to 1.8 m providing the run does not exceed 4.6 m and water pressure
at the conditioner is not less than 2.76 bar. Elevation can increase by 61 cm for each additional 0.69
bar of water pressure at the drain connector.
Where the drain line is elevated but empties into a drain below the level of the control valve, form a
18 cm (7") loop at the far end of the line so that the bottom of the loop is level with the drain line
connection. This will provide an adequate siphon trap.
Where the drain empties into an overhead sewer line, a sink-type trap must be used.
Secure the end of the drain line to prevent it from moving.

A
Note
The drain line connects to the elbow previously installed. See 5.8.1. Bypass assembly,
page 24.
A
Note
Waste connections or the drain outlet shall be designed and constructed to provide
connection to the sanitary waste system through an air-gap of 2 pipe diameters or 25.4 mm
(1"), whichever is larger.
A
Caution
Never insert the drain line directly into a drain, sewer line or trap. Always allow an air gap
between the drain line and the wastewater to prevent the possibility of sewage being back-
siphoned into the conditioner.
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Air gap
Drain
Ref. MKT-IM-007 / A - 16.12.2016