Watts AMES Deringer 20G User manual

Installation, Operation and

Maintenance Manual

IOM-A-Deringer 20G/30G_2.5-4

Deringer™20G/30G

Double Check Valve/Double

Check Detector Assemblies

Size: 2½" – 4"

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

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

18mm Socket & Wrench 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

Adjustable Wrench Deringer Test Cock Wrench Slip-Joint Pliers

Closing Shutoff Valves Prior to Maintenance

1. Slowly rotate shutoff valve #2 handle to the closed

position. Stem concealed (A).

2. Slowly rotate shutoff valve #1 handle to the closed

position. Stem concealed (A).

NOTICE

When the threaded portion of the OS&Y stems are fully exposed above the

handwheel the shutoff valves are in the open position. Before doing any

maintenance be sure to turn the handwheel towards the closed position until

the threaded portion of the OS&Y stems have receded down into the bonnet

indicating the shutoff valves are in the closed position (A).

FLOW

ClosedOpen

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 adjust-

able 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 30G 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 30G 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

Bypass Test CockMain Test Cock

Closed Open Closed Open

Removing Access Port Cover Plate

1. Using a 5/8" socket wrench loosen all

eight bolts on the access port cover

plate (A).

2. Remove bolts (A) and store in a safe

place. If lost, tapered bolts must be

replaced with like Deringer cover

bolts and cannot be substituted with

standard bolts.

3. Remove access port cover plate (B).

Do not remove access port O-ring (C).

Removing the First Dual-actionTM Check Module

FLOW

1. Use a torx 45 bit or key to loosen the check retainer

bolts on both sides of the valve body (A). Do not com-

pletely 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). This allows

easy removal of check modules

2. Insert a flathead screwdriver between the inner valve

body and the first check module flange (C), gently

move the first check module in the downstream

direction until the first check module can easily be

removed from the access port by hand.

NOTICE

There are several different versions of the check retaining bolts.

Make sure you use the proper tool for the different types. (torx,

hex, allen)

Removing the Second Dual-action Check Module

FLOW

1. Remove 1st check prior to removing 2nd check as

described above.

2. Use a torx 45 bit or key to loosen the check retainer

bolts on both 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).

3. 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.

NOTICE

There are several different versions of the check retaining bolts.

Make sure you use the proper tool for the different types. (torx,

hex, allen)

Deringer 30G: Disassembly and Maintenance of Bypass Check Valve

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.

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.

Deringer 30G: Removing Bypass Meter

1. Using the ball valve handles close the #2 bypass ball valve

(D) 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 flat head screw driver open bypass test cock

#2 (B) and then open bypass test cock #1 (C). (Test cock is

open when screw driver 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.

FLOW

Maintenance of First Dual-action 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 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).

Maintenance of First Dual-action Check Module (Continued)

First Check Tower Bosses and Spring Arms Face Up

Orient seat protrusions as shown

Tower Bosses

Spring Arms

NOTICE

The diagram on the right shows the correct orientation of the

first 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.

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).

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.

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) has 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

Not BindingBinding

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), coax 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

NOTICE

Recommended torque for the check retainer bolts is 50 ft. lb.

Installing Access Port Cover

1. It is best to never remove the access port O-ring (A). Should the access port

O-ring (A) become dislodged, simply insert it back into access port groove (B).

2. Slide the access port cover (C) into place being certain that access port O-ring

(A) does not become dislodged during the process.

3. Insert cover bolts (D) into tapered cover holes (E).

4. Use ratchet wrench (F) to sequentially tighten all cover bolts (D) alternating from

one side of the valve to the other.

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