Watts AMES Deringer 40 User manual

Installation, Operation and
Maintenance Manual
IOM-A-Deringer 40/40X/50/50X_6-8
Deringer™40/40X/50/50X
Reduced Pressure Zone/
Reduced Pressure Detector Assemblies
Size: 40/50: 6"&8"
40X/50X: 4"&6"
WARNING
!
Read this manual BEFORE using this equipment.
Failure to read and follow all safety and use information can
result in death, serious personal injury, property damage, or
damage to the equipment.
Keep this manual for future reference.
You are required to consult the local building and plumbing
codes prior to installation. If the information in this manual
is not consistent with local building or plumbing codes,
the local codes should be followed. Inquire with governing
authorities for additional local requirements.
WARNING
!

2IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
This list is the recommended tools for installation. Other
versions of the same tool can be used. For example, allen
wrenches instead of allen drive sockets.
Tools Required
15/16" Socket
11/8" Socket
Wood Block 2" x 4" x 5"
Wood Block 1" x 2" x 16"
#2 Phillips Head Screwdriver #2 Flathead Screwdriver 5/8" Ratchet Wrench
7/16" Ratchet Wrench (x2)
9/16" Ratchet Wrench
Adjustable Wrench Deringer Test Cock Wrench Slip-joint Pliers
Toothbrush

3
IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Closing Shutoff Valves Prior to Maintenance
1. Slowly rotate shutoff valve #2 handle (C) clockwise to the
closed position. Flag perpendicular to flow (A).
2. Slowly rotate shutoff valve #1 handle (B) clockwise to the
closed position. Flag perpendicular to flow (A).
NOTICE
When yellow/orange position indicator flags are parallel with the flow of water
the shutoff valves are in the open position. Before doing any maintenance be
sure the yellow or orange flow indicators (flags) are perpendicular to the flow
of water valve body indicating shutoff valves are in the closed position (A).
FLOW
FLOW
B
A
A
C
A
Opening Test Cocks and Bleeding All Pressure
from the Line Before Maintenance
NOTE: valve is still under pressure. When opening test cocks,
water will be released. Take precautions to ensure discharging
water does not damage the surrounding area/equipment or
create an unsafe condition.
1. DO NOT OPEN Main test cock number 1, as it is still
subject to line pressure.
2. Using the DeringerTM test cock wrench or a small
adjustable wrench open (A) main test cock number 4.
(Test cock is open when wrench flats are parallel to water
flow through test cock).
3. Deringer 50/50X only: using a #2 flathead screwdriver open
bypass test cock number 2. (Test cock is open when screw-
driver slot is parallel to water flow through test cock (B)).
4. Using the Deringer test cock wrench or a small adjustable
wrench open main test cock number 3.
5. Deringer 50/50X only: using a #2 flathead screwdriver open
bypass test cock number 1.
6. Using the Deringer test cock
wrench or a small adjustable
wrench open main test
cock number 2.
FLOW
BB
A
A
Shut-off Valve (SOV)
Number 1
Shut-off Valve (SOV)
Number 2
Bypass Test CockMain Test Cock
Closed Open Closed Open

4IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Removing Access Port Cover Plate
C
D
1. Using a 15/16" socket wrench loosen all eight bolts
on the access port cover plate (A).
2. Remove bolts and tapered washers (B) and store in
a safe place. Be careful not to lose tapered washers
as the access cover will not seal properly without
the tapered washers.
3. Remove access port cover plate (C). Do not remove
access port O-ring (D).
A
B
Removing the First Dual-actionTM Check Module
FLOW
C
A
1. Use a 15/16" socket wrench to loosen the check
retainer bolts on both sides of the valve body (A).
Do not completely remove check retainer bolts from
valve body. Loosen the bolts until the ends of the
bolts are flush with the inner wall of the valve body
(B).
2. Insert a flathead screwdriver between the inner valve
body and the first check module flange (C), gently
push the first check module in the downstream
direction until the first check module can easily be
removed from the access port by hand.
B
Removing the Second Dual-action Check Module
1. Use a 11/8" socket wrench to loosen the check retainer
bolts on each side of the valve body (A). Do not
completely remove check retainer bolts from valve
body. Loosen the bolts until the ends of the bolts are
flush with the inner wall of the valve body (B).
2. Insert a flathead screwdriver between the inner valve
body and the second check module flange (C),
gently push the second check module in the
upstream direction until the second check module
can easily be removed from the access port by hand.
FLOW
C
B
A

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IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Deringer 50/50X: Disassembly and Maintenance of Bypass Check Valve
A
C
B
A
D
Part 1
1. Use an adjustable wrench to rotate check cover (A) counterclockwise
to remove.
2. Examine cover plate O-ring (B) for damage or fouling.
3. Remove spring (C).
4. Remove check poppet assembly (D) and examine for damage
or fouling.
5. Examine seat cage, located inside the bypass check valve body,
for damage or fouling to the sealing seat. Do not remove unless
the seat cage is being replaced.
6. Reverse the order of above instructions to reassemble bypass
check valve.
A
Part 2
1. To replace a damaged red silicone poppet disk, use a #2 phillips
head screwdriver to remove the disk retaining screw (A).
2. Remove disk retaining washer (B).
3. Use a flathead screwdriver to remove the gasket from
poppet cavity (C).
4. Install new red silicone poppet disk (D).
5. Reverse the order of the above instructions to reassemble
check poppet assembly.
6. Reverse the order of the instructions on the previous page to
reassemble bypass check assembly.
A
AC
B
D

6IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Deringer 50/50X: Removing Bypass Meter
1. Using the ball valve handles close the #2 bypass ball valve
(B) and then #1 bypass ball valve (A). (Ball valve is closed
when “T” handle is perpendicular to water flow through
ball valve).
2. Using a #2 flathead screwdriver open bypass test cock #2
(D) and then open bypass test cock #1 (C). (Test cock is
open when screwdriver slot is parallel to water flow through
test cock).
3. Using large adjustable pliers or a wrench, unscrew and
retract bypass meter coupling nuts (E). Remove the gaskets
(F) on both sides of bypass meter.
4. Gently remove bypass meter (G) from line. It is OK if the
bypass fittings move slightly during the removal process.
5. Reverse order of above instructions to reinstall bypass
meter. Remember to install gaskets (F) before threading
meter coupling nuts into place.
B
C
E
E
GF
E
FLOW
DA
Maintenance of First True Seal Check Module
1. Use a #2 phillips head screwdriver to remove tower screws
(A) from the first check seat (B) the double torsion spring
is captured (C) and does not need to be retained
during maintenance.
2. After removing the tower screws (A) examine the elastomer
disk (D) and check seat (E) for fouling or damage.
3. Should elastomer disk (D) need replacement unscrew disk
retainer screws (F) and remove disk retainer (G). Carefully remove
and replace elastomer disk (D). When replacing elastomer disk
(D) be certain that no air, water or debris is trapped in the
clapper (H) cavity behind the elastomer disk (D).
4. Reverse the order of the above instructions to reassemble
check.
• Elastomer disk must be flat in clapper (H) cavity before
tightening disk retainer screws (F).
• Do not cross thread disk retaining screws (F).
• Check orientation is not important when reattaching the
check to the first check seat.
F
G
D
B
AH
C
DE
C

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IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Maintenance of Second Dual-action Check Module
1. Use a #2 phillips head screwdriver to remove tower screws
(A) from the second check seat (B) the double torsion
spring is captured (C) and does not to be retained
during maintenance.
2. After removing the tower screws (A) examine the elastomer
disk (D) and check seat (E) for fouling or damage.
3. Should elastomer disk (D) need replacement unscrew disk
retainer screws (F) and remove disk retainer (G). Carefully
remove and replace elastomer disk (D). When replacing
elastomer disk (D) be certain that no air, water or debris is
trapped in the clapper (H) cavity behind the elastomer disk (D).
4. Reverse the order of the above instructions to reassemble check.
• Elastomer disk must be flat in clapper (H) cavity before
tightening disk retainer screws (F).
• Do not cross thread disk retaining screws (F).
F
G
D
H
B
CA
E
D
NOTICE Second Check Tower Bosses and Spring Arms Face Down
Orient seat protrusions as shown
Tower Bosses
Spring Arms
The diagram on the right shows the correct orientation of the
second dual-action check module when being re-attached to
the seat. In order to maintain the performance of the valve pay
attention to the proper orientation of the check module.

8IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Installing Second Dual-action Check Module
1. Insert second check module (A) into access port (B) with second
check towers (C) pointing downstream. Push second check module
(A) downstream into valve sealing ring (D) until check O-ring (E) rests
against valve sealing ring (D). Push second check module (A) into its
fully seated position by hand.
2. Alternatively place 2"x4" piece of wood cut to 5" length (F) against
the backside of the second check seat ring (G). Using a 1"x4" piece
of wood cut to 16" length (H) as a lever between access port wall the
2"x4" (F) gently move the second check module (A) into its fully
seated position.
3. Be certain second check module (A) is fully seated and check O-ring
(E) is NOT “fish mouthed” or damaged.
4. Tighten the second check retaining screws (I) ONLY AFTER the first
check module (A) as been installed.
The second check module must be fully seated to ensure
retainer screws do not bind against check seat. Binding
retainer screws against check seat will result in permanent
damage to second check modules.
WARNING
!
FLOW
C
D
A
B
G
Not BindingBinding
I
H
F
E

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IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Installing First Dual-action Check Module
1. Insert first check module (A) into access port (B) with first check
towers (C) pointing downstream. Push first check module (A)
upstream into valve sealing ring (D) until check O-ring (E) is
resting against valve sealing ring (D). Push first check module
(A) into its fully seated position by hand.
2. Alternatively, using a piece of 1"x4" wood cut to 16" length
(F) as a lever between the second check seat (G) and the first
check towers (C), push the first check module (A) into its fully
seated position.
3. Be certain first check module (A) is fully seated and check
O-ring (E) is NOT “fish mouthed” or damaged.
4. Now fully tighten the first and second check retaining screws (I).
The first check module must be fully seated to ensure
retainer screws do not bind against check towers. Binding
retainer screws against check towers will result in permanent
damage to first check modules.
WARNING
!
FLOW
Not BindingBinding
C
A
B
E
F
G
D
I
NOTICE
Typically, when a RP device is leaking from the relief valve, a fouled
or damaged first check valve is the cause. Make sure the first check
valve is functioning properly before assuming there is a problem with
the relief valve. If the first check is found to be functioning properly,
we recommend cleaning the relief valve piston (B) and seat (C). Use
a toothbrush (A) to gently brush away any debris on the relief valve
piston (B) or seat (C) that may be preventing the piston (B) from seal-
ing properly against the seat (C). This should return the relief valve to
proper working order without disassembly or the use of a repair kit.
Maintenance of Relief Valve
A
B
C

10 IOM-A-Deringer 40/40X/50/50X_6-8 2005 EDP#2916006 © 2020 Watts
Maintenance of Relief Valve
B
A
E
1. Using a 5/8" box wrench disconnect the relief valve sensing
line from the valve body (A).
2. To remove the relief valve from the valve body disconnect
the two relief valve mounting bolts (B) using a 9/16" wrench.
When removing the relief valve be sure not to drop the top
O-ring (C) as the relief valve body uses this O-ring to seal
against the valve body.
3. To access the relief valve remove the relief valve cover using
two 7/16" wrenches to remove cover bolts (D).
4. Remove the relief valve diaphragm (E) and check the
diaphragm for tears, holes or debris (F).
C
NOTICE
If one is certain that the relief valve requires maintenance proceed as follows.
F
DD
Maintenance of Relief Valve (continued)
B
D
1. Check the rubber seal on the relief valve piston assembly (A) for
fouling or damage by making sure the indentation of the seat in
the rubber seal is present all the way around. (Confirm the relief
valve piston assembly (A) sets flush on relief valve seat (B).
2. Check relief valve seat (B) for fouling or damage before
reinstalling the relief valve piston assembly (A).
3. Once the relief valve is ready to be reassembled, the first step is
to reform and reattach the diaphragm to the piston.
4. Move the diagram (C) to the fully open position making sure the
embossed center is facing up.
5. While holding the diaphragm (C) with both hands, use your
thumbs to gently push down on embossed center (D) so the
diaphragm collapses into itself and forms a circle so that the
bottom of the piston assembly can be inserted into the
diaphragm and the embossed center can be pushed into
the piston assembly groove.
C
A