American Backflow A.R.I. RP-500 User manual

RP-500
½” - 2”

Product Overview
Production of the RP500 began in 2007
and is current.

Single Access Cover Removal
The RP cover is spring
loaded and sealed by
the diaphragm.
Hold cover firmly while
removing 6 screws.
The DC cover has no
spring load and is o-ring
sealed (quad ring).

Check Valve Removal
Modules are o-ring
sealed and secured
by a retainer.
Slide retainer straight
out of the body.
Modules can be
removed by hand or
with a flat screwdriver.

Disassemble Check Module ½” - 1”
Module is spring loaded.
Locate the 3 tabs on the
side of the check module.
Use small flat head
screwdriver to press each
tab toward the outlet of
the check module.
Hold spring retainer
securely during
disassembly.

Disassemble Check Module 1 ¼” - 2”
Module is spring loaded.
Grasp the check with both
hands and turn the spring
retainer counter-clockwise.
The seat, spring and disc
assembly are free once
the spring retainer has
been removed.

Check Seat Replacement
The seat is a part of
the check module.
If the seat has been
damaged, the module
must be replaced.

Check Disc Replacement
½” - 1”
Pry the check disc
from the disc
retainer.
1 ¼” - 2”
Remove the screw
from the disc
retainer.

Check Valve Reassembly Notes
Reassemble check
modules in reverse order.
½” - 1” modules make sure
the tabs line up with slots
when pressing together.
If check retainer does not
slide into place easily,
make sure checks are
seated properly.

RV Stem Removal
The RV stem and
spring are situated
between the check
valves and are free
once the single
access cover is
removed.

RV Seat Removal
Unless damaged,
there is no need to
remove the seat.
The seat is pushed
firmly into the body
and is o-ring sealed.

RV Stem Disassembly
Remove the screw at the
top of the stem.
Remove the upper plate,
diaphragm and lower
plate.
An o-ring is located under
the bottom plate on the
stem.

RV Stem Disassembly
The RV disc is on the lower
stem and held in place by
the stem fin guide.
¾” - 1” The stem fin guide
is not removable. The disc
must be pulled out from
around the guide.
1 ¼” - 2” Remove the
retaining screw and guide.

RV Stem Reassembly
Make sure ridge on
diaphragm is facing
down.
Lubricate the upper
stem o-ring.
Do not over tighten
the RV screw.

Reassembly Notes
Make sure sensing line
o-ring is in place.
The RV stem will insert
through the hole of the
retainer and the spring will
rest on top of the the
retainer.
The diaphragm ridge must
line up with the groove on
the body and cover.