Drain Line Connection - Autotrol 255 Manuel D'utilisation

En

Drain Line Connection

1. The unit should be above and not more than 20 feet (6.1 m) from the drain. Use an
appropriate adapter fitting to connect 1/2-inch (1.3 cm) plastic tubing to the drain line
connection of the control valve.
2. If the backwash flow rate exceeds 5 gpm (22.7 Lpm) or if the unit is located 20-40 feet
(6.1-12.2 m) from drain, use 3/4-inch (1.9 cm) tubing. Use appropriate fittings
to connect the 3/4-inch tubing to the 3/4-inch NPT drain connection on valve.
3. The drain line may be elevated up to 6 feet (1.8 m) providing the run does not exceed
15 feet (4.6 m) and water pressure at the conditioner is not less than 40 psi (2.76 bar).
Elevation can increase by 2 feet (61 cm) for each additional 10 psi (0.69 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-inch (18-cm) 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.
Figure 8
Drain Line Connection
WARNING: The inlet water must be connected to the inlet port of the valve.
When replacing non-Autotrol valves, the inlet and outlet may be reversed. It
is also possible for the plumbing to be installed in an opposite order.
Do not solder pipes with lead-based solder.
WARNING: Do not use tools to tighten plastic fittings. Over time, stress may
break the connections. When the 1265 or 256 bypass valve is used, only
hand tighten the plastic nuts.
WARNING: Do not use petroleum grease on gaskets when connecting
bypass plumbing. Use only 100% silicone grease products when installing
any plastic valve. Non-silicone grease may cause plastic components to fail
over time.
NOTE: Standard commercial practices are expressed here. Local codes may
require changes to the following suggestions. Check with local authorities
before installing a system.
Air Gap
Drain
12