Instruction Manual

Special attention for situations where a Filter and a Tannin System are installed
together:
When a whole house filter and a Tannin System are installed side by side, the preferred approach is
to run a separate drain line from each unit all the way to the point of termination. If this is not done,
there is the potential for drain water from the filter to back feed through the Tannin System and overfill
the brine tank, especially when drain lines are run overhead. (Please note that back feed goes only
into the brine tank, not the service line.)
If circumstances require you to tie the drain lines together, please use one of the following methods
to avoid back feed issues:
Option 1: Run the drain lines from both systems to the point of termination, and tee them together
before the air gap. (See figures below)
Option 2: Install a PVC check valve with a light spring on the Tannin System side to prevent back
flow to the Tannin System (See figure below).
7
WATER IN
TREATED
WATER OUT
2 SEPARATE DRAIN LINES
TO APPROVED DRAIN
LOCATION WITH AIR GAP
FILTER
SOFTENER
2 SEPARATE
DRAIN LINES
AIR GAP
APPROVED FLOOR DRAIN
TEE
FILTER
TANNIN SYSTEM
SPRING CHECK ON DRAIN
LINE AFTER SOFTENER
WATER IN
TREATED
WATER OUT
TO APPROVED DRAIN
LOCATION WITH AIR GAP