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Installation
Refill Flow Control Assembly or Refill Port Plug
Control valves that are setup for backwash only come equipped with a refill port plug. The refill port plug has no regenerant line
connection.
Control valves that use a regenerant come equipped with a 3/8” refill flow control assembly. To switch to the ½” refill flow control
assembly, remove the refill flow control and retainer (from the 3/8” refill elbow) by twisting and pulling out. Insert the refill flow
control and retainer into the ½” refill elbow.
To complete the regenerant line connection, orientate the outlet in the desired direction and push the plastic insert into the polytube.
Push the polytube into the nut. Do not use pipe dope or other sealants on threads. The threads for the compression nut do not need
Teflon tape. Tighten the nut securely to create a pressure tight connection. A pliers or crescent wrench may be used to tighten or
unscrew the nut. The nut, gripper and retainer sleeve is a 3 piece assembly that can come apart if removed from the elbow body. Parts
must be reassembled exactly as shown in refill flow control assembly drawing to function properly. If the nut is completely removed
from the body, slip the nut, plastic gripper and retainer sleeve on to the tube then tighten on to the fitting.
Drain Line Flow Control and Fitting Assembly
To determine which drain line flow control to use, obtain media bed expansion tables from the media manufacturer, choose a water
temperature and look up the desired backwash rate per square foot of bed area. Then calculate the backwash rate using the desired tank
diameter. Using Table 7, choose the drain line flow control that has the backwash flow rate closest to the calculated backwash rate. If a
manufacturer chooses to use an external drain line flow control, use an elbow fitting that does not contain a hole.
If the drain line is a 5/8” flexible polytube, slide the nut onto the polytube, then place the polytube insert into the end of the polytube
and tighten the nut on to the ¾” drain line fitting. The nut is only designed for use with flexible polytube. Use other nuts if attaching
different materials.
To access the drain line flow control remove the locking clip by pulling it straight out. Pull fitting out and replace the locking clip so
that it is not misplaced. The drain line fitting is pressed in and has an o-ring seal.
In the ¾” elbow, the white flow control retainer is pressed in and has an o-ring seal. The retainer can be removed by rotating and
pulling. The flow control can be removed by prying upward with a small blade flat screwdriver in one of the slots on the side. The
drain line flow control and retainer can be chemically cleaned in dilute sodium bisulfite or vinegar, or replaced. Do not use a wire
brush to clean the flow control or the washer. The washers are identified with three numbers, which correspond to the flow rate. When
reinstalling make sure the identifying number and the rounded inside diameter on the washer is visible when seated in the retainer. The
white flow control washer retainer can also be removed and cleaned. Push the retainer in firmly when reinstalling.
In the 1” straight fitting, the retainer is the fitting. Unscrew the nut to access the flow control. The drain line flow control and the
fitting can be chemically cleaned or replaced. Do not use a wire brush to clean the flow control or the fitting.
Do not use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on the black o-ring. Use a
pliers or crescent wrench to tighten or unscrew the nut. Do not use a pipe wrench to tighten or loosen nut. Do not use pipe dope or
other sealants on threads. Use Teflon tape on the threads of the drain line control fitting when installing ¾” NPT or 1” straight fitting.
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