Drain Line Connection
17
Rev D
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 (.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.
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.
