7800 Greensand Filter Installation & Startup Guide
Page 10
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Rev 120214
14.
Connect some flexible tubing from the drain connection on the 7800 control valve to a suitable
drain such as a septic tank or drain to a sewer. It is OK to run the drain line up and over the
7800 Greensand Filter up to 4 feet above the top of the tank. If the drain line will be more than
20 feet, use larger diameter tubing such as ¾” or 1”. Note that it is desirable to be able to run
the drain line into a bucket in order to test the backwash flow rate in the future. This is why
hard piping the drain line is discouraged, however, if you do use hard PVC piping for the drain
line, and you are able to remove the hard PVC drain piping and attach flexible tubing should you
ever desire for testing purposes, it is OK to use rigid PVC pipe for the drain. Make sure the drain
tubing is firmly clamped to the barbed fitting with a hose clamp to prevent leaks.
Fig 6 7800 Pot Perm Line Installation
15.
Loosen the fitting and insert 3/8” diameter tubing into the chlorine side tank connection. Simply
push the tubing into the fitting until it can go no further. The tube should be snug in the fitting.
Hold the tubing in place and then tighten down the fitting to secure it in place. Make sure that it
is secured in place and cannot be easily pulled out.
