A.Y. McDonald 112-3HE43 User Manual

A.Y. McDonald Mfg. Co.

Angle Dual Check Backow Preventers/Device

111 & 112 Series

Model Number Explanation

SPACE 1,2 & 3

Basic dual check valve model
number:

111 = Inline valve
112 = Angle valve

SPACE 4

(–) Standard
R = Reverse direction of ow
W = Pentagon test plug in cap

SPACE 5

Dual check valve size:
3 = 3/4" 4 = 1"

SPACE 6

Inlet connection type:

A = Male meter thread integral
B = Male meter thread union
C = CTS (22) Mac-Pak compression union
E = Female iron pipe integral
F = Female iron pipe union
G = CTS T-Series compression union
H = Meter swivel integral with saddle
J = Meter swivel integral
K = K-Style male thread integral
L = K-Style female thread union
M = Male iron pipe union
N = Meter female thread union
P = Male iron pipe thread integral
Q = K-Style male thread union
S = Male meter thread with o-ring seal integral
T = CTS T-Series compression integral
W = Yokebox Cradle
Y = Yoke style thread male integral
2 = CTS (22) Mac-Pak compression integral

SPACE 7

Outlet connection type:

A = Male meter thread integral
B = Male meter thread union
C = CTS (22) Mac-Pak compression union
G = CTS T-Series compression union
E = Female iron pipe integral
F = Female iron pipe union
H = Meter swivel integral with saddle
K = K-Style male tread integral
L = K-Style female thread union
M = Male iron pipe union
N = Meter female thread union
P = Male iron pipe thread integral
Q = CTS Q-Series compression integral
R = Copper are integral
T = CTS T-Series compression integral
V = CTS Q-Series compression integral
2 = CTS (22) Mac-Pak compression integral

A.Y. McDONALD MFG. CO. • 4800 CHAVENELLE RD. • P.O. BOX 508 • DUBUQUE, IA 52004-0508

3210-373

Meets requirements of ASSE 1024 and CSA B64.6

Components / Repair Parts

Standard Flow Direction

O-ring

→

Inlet

→

Bottom

cartridge

check

O-ring repair part

→

Inlet

→

→

O-ring

repair part

→

→

O-ring

→

→

→

→

Insert spacer

repair part

→

Bottom

→

check cartridge

repair part

→

Outlet

Reverse Flow Direction

O-ring

→

Inlet

→

O-ring repair part

Outlet

O-ring

repair part

→

Outlet

SPACE 8 & 9

Sizes for inlet (8) and outlet (9) connections:

1 = 1/2" 3 = 3/4" 5 = 1 1/4"
2 = 5/8" 4 = 1" 6 = 1 1/2"

Thread size of meter swivel nut:

METER THREAD METER
SIZE SIZE DESIGNATOIN

5/8 3/4" 3

5/8x3/4 1" 4
3/4 1" 4
1 1 1/4" 5

For Iron Yokes use the following
designation:

METER THREAD METER
SIZE SIZE DESIGNATOIN

5/8 - 2
5/8x3/4 - 3
3/4 - 3
1 - 4

HOW TO ORDER

UNIT REQUIRED (Example):

• Angle style valve • No test valve

• Valve size 3/4" • Outlet - FIP integral 3/4"

Meter swivel integral with

• Inlet -

saddle (5/8 x 3/4 meter)

Not all sizes or combinations are

available - contact factory.

Order Model 112-3HE43

Space 1-3

800-292-2737 • FAX [phone]

Space 4

Space 5

Space 6

112

-

3

H

(Installation and test procedures on opposite side)

→

→

check

→

→

→

Space 7

E

→

→

Bottom

cartridge

→

Inlet

→

check cartridge

Space 8

→

O-ring

Outlet

→

→

Insert spacer

repair part

→

Bottom

repair part

Space 9

4

6/09

3

A.Y. McDonald Mfg. Co.

1. Use only for residential and mobile home supply service or individual outlets.

2. The device can be installed in any position.

3. The device shall be installed in an accessible location to facilitate the removal for servicing
and testing.

4. Service lines should be thoroughly ushed before installing the device. Excessive pipe
sealant or Teon tape may foul checks. A suitable strainer should be installed upstream of the device.

5. DO NOT use Vaseline ®, plumber's grease, or any other petroleum based product on seals or o-rings.

6. Insure that device is installed in proper ow direction. Refer to ow direction arrow on body.

7. Do not over-tighten O-ring cap seal or across body cylinder to avoid distortion.

8. Any sweat ttings must be completed before installing device.

9. A pressure relief valve or expansion tank is recommended downstream of device if thermal
expansion conditions are possible.

10. Use only on cold water services. Protect from freezing.

11. Refer to pressure and temperature ratings on device tag.

INSTALLATION INSTRUCTIONS

FIELD INSPECTION AND TEST PROCEDURE

A. DIS-ASSEMBLY

1. Remove the device cap.

2. Remove the two check assemblies using care not to damage device
components.

3. Visually inspect seals, sealing surfaces, etc. for debris or damage.

B. TESTING

1. Insert top check assembly into A.Y. McDONALD angle test kit as
shown in drawing.

2. Add water to test kit level to upper red line - 42 inches (1.5 PSIG).

3. Observe water level for up to 5 minutes until water level stabilizes.
Water level should not fall below lower red line - 28 inches (1.0 PSIG).

4. If water column falls below 28 inches the check assembly should be
cleaned and re-tested or replaced.

5. Repeat steps B1 - B4 for bottom check cartridge.

C. RE-ASSEMBLY

1. Clean and inspect device components.

2. Check cartridge O-rings should be lightly lubricated with a NSF
approved silicone lubricant.

3. Insert check assemblies into body correctly corresponding to ow
direction on the device body.

4. Insert spacer and re-assemble device cap. Do not over-tighten.

42"

28"

Contact factory for

test kit.

WARNING: Beginning January 1, 2010, it is unlawful in CALIFORNIA and VERMONT to

use any product in the installation or repair of any public water system or any plumbing in a
facility or system that provides water for human consumption if the wetted surface area of
the product has a weighted average lead content greater than 0.25%. This prohibition does
not extend to service saddles used in the state of CALIFORNIA.

A.Y. McDONALD MFG. CO. • 4800 CHAVENELLE RD. • P.O. BOX 508 • DUBUQUE, IA 52004-0508

3210-373

800-292-2737 • FAX [phone]

6/09