7500
Pro
‐
Ox
Filter
Installation
&
Startup
Guide
Page
5
www.cleanwaterstore.com
Rev
060116
Drain
Port.
From
the
male
pipe
thread
on
the
External
Flow
fitting,
you
can
transition
to
a
barb
fitting
and
run
tubing
to
where
you
need
to.
3.
Make
sure
there
is
a
working
gate
or
ball
valve
before
the
7500
Greensand
Filter
and
also
one
after
as
shown
in
Fig
2.
The
pressure
gauges
are
optional,
but
they
are
a
great
way
to
tell
at
a
glance
if
your
filter
needs
to
be
backwashed.
A
hose
bib
(which
is
a
faucet
to
which
you
can
attach
a
garden
hose)
is
strongly
recommended
after
the
Greensand
Filter
and
before
the
second
ball
valve.
This
makes
it
easy
to
rinse
your
new
Greensand
Filter
on
start
‐
up
and
gives
you
a
place
to
test
the
water
before
it
enters
your
household
plumbing.
4.
If
you
will
be
using
copper
piping,
do
not
sweat
the
copper
pipe
directly
on
to
the
7500
control
valve.
Avoid
heating
up
the
7500
control
valve
plastic
with
the
torch.
5.
You
should
install
unions
and
a
bypass
around
the
valve,
so
that
you
can
remove
it
and
still
have
water.
6.
The
drain
line
tubing
(not
supplied)
is
connected
to
a
drain
from
the
External
Flow
Control
fitting
using
a
Female
X
Barbed
fitting
and
flexible
tubing.
Note
that
the
drain
can
run
up
above
the
7500
control
head
and
into
a
drain,
it
does
not
have
to
drain
down,
as
the
filter
backwashes
under
line
pressure
from
your
well
pump.
Most
plumbing
codes
require
an
air
‐
gap
connection,
so
that
if
your
sewer
or
septic
tank
backs
up,
it
cannot
cross
connect
with
the
drain
tubing.
How
Your
Greensand
Filter
Works
See
Fig
1
on
the
right.
In
your
Greensand
Filter
the
water
enters
the
top
of
the
tank
(red
arrows)
and
flows
down
through
the
media
and
up
the
distributor
tube
(blue
arrows).
The
downflow
type
Greensand
Filter
removes
iron
and
can
be
backwashed,
which
cleans
and
re
‐
classifies
the
media,
preventing
channeling.
During
backwash
the
flow
of
water
is
reversed
and
water
flows
down
the
distributor
tube
and
up
through
the
media,
lifting
and
expanding
the
Greensand
media.
During
the
backwash
the
media
is
cleaned
by
the
action
of
the
water
flowing
through
it.
Greensand
Media
