Watts AMES Deringer 20G User manual

Installation, Operation and

Maintenance Manual

IOM-A-Deringer 20G/20GX/30G/30GX_6-8

Deringer™20G/20GX/30G/30GX

Double Check Valve/Double

Check Detector Assemblies

Size: 20G/30G: 6"&8"

20GX/30GX: 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

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 Ratchet

Adjustable Wrench Deringer Test Cock Wrench Slip-joint Pliers

Closing Shutoff Valves Prior to Maintenance

1. Slowly rotate shutoff valve #2 handle (A) clockwise

to the closed position.

2. Slowly rotate shutoff valve #1 handle (C) clockwise

to the closed position.

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 (See diagram to right).

FLOW

ClosedOpen

OS&Y valves in closed position

OS&Y valves in open position

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 30G/30GX only: Using a #2 flathead screwdriver

open bypass test cock number 2. (Test cock is open when

screwdriver 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/30GX 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

Removing the First Dual-actionTM Check Module

FLOW

Removing the Second Dual-action Check Module

Deringer 30G/30GX:

Disassembly and Maintenance of Bypass Check Valve

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).

1. Use a 15/16" socket wrench 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).

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.

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

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.

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

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).

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/30GX: 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 flat head screwdriver open bypass test cock #2

(D) 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

Disassembly and Maintenance of Bypass Check Valve (continued)

Maintenance of First Dual-action Check Module (continued)

NOTICE

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 (C) is captured 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).

Maintenance of Second Dual-action Check Module

NOTICE

First Check Tower Bosses and Spring Arms Face Up

Orient seat protrusions as shown

Tower Bosses

Spring Arms

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.

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 coax 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 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

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). Without

using excessive force, 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

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 tapered washers (E), flat side facing up, and cover bolts (D) into tapered

cover holes (F). Tapered washers (E) must be properly installed or the access

port cover (C) will not seal under pressure.

4. Use 15/16" socket wrench (G) to tighten the 4center cover bolts (D) alternating from

one side of the valve to the other. Then tighten the 4 corner bolts alternating

from one side of the valve to the other.

Close Test Cocks and Double Check All Closing/Sealing Mechanisms

1. Using the test cock wrench or a small adjustable wrench

close main test cocks number 2, 3 and 4 (A). (Test cock

is closed when wrench flats on stem are perpendicular to

water flow through test cock)

2. Deringer 30G/30GX: Using a #2 flathead screwdriver close

bypass test cock number 1 and 2 (B). (Test cock is closed

when screwdriver slot on stem is perpendicular to water flow

through test cock)

3. Use the “T” handles to open bypass ball valve number 1 (D)

and then open bypass ball valve number 2 (C). (Ball Valve is

open when “T” handle is parallel to water flow through

ball valve)

4. Double check to be certain of the following:

• All cover bolts are tightened (E)

• Deringer 30G/30GX: Bypass check valve cover is

tightened (F)

• Deringer 30G/30GX: Bypass meter coupling nuts are

tightened (G) FLOW

Open

Closed

Open Shutoff Valves to make Backflow Preventer Functional

1. Slowly rotate shutoff valve #2 handle (A) to the open

position. Stem exposed (B).

2. Slowly rotate shutoff Valve #1 Handle (C) to the open

position. Stem exposed (B).

FLOW

OpenClosed

Limited Warranty: Ames Fire & Waterworks (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date

of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER

WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special

or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from

labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control.

This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the

above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to

determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES

OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

USA: Backflow T: (978) 689-6066 • F: (978) 975-8350 • AmesFireWater.com

USA: Control Valves T: (713) 943-0688 • F: (713) 944-9445 • AmesFireWater.com

Canada: T: (888) 208-8927 • F: (888) 479-2887 • AmesFireWater.ca

Latin America: T: (55) 4122-0138 • AmesFireWater.com

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