Watts 008PCQT User Manual

For Health Hazard and Continuous Pressure Applications

ES-008PCQT

Job Name

Job Location

Engineer

Approval

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Series 008PCQT

Health Hazard, Anti-Siphon,
Spill-Resistant Backflow Preventer

Sizes: 3⁄8", 1⁄2", 3⁄4" and 1" (10, 15, 20, 25mm)

Series 008PCQT is designed for indoor point-of-use applica­tions to prevent backsiphonage of contaminated water back
into the potable water supply. Separation of the water supply
from the air inlet is accomplished by means of a diaphragm
seal. This feature protects against any spillage during start-up
or operation.

Features

• Standardly supplied with internal polymer coating

• Standardly supplied with Tee handles

• Available less Tee handle with stem wrench flats. For use
where space is limited

• Available in left-handed or right-handed outlet

• Spill-resistant design for indoor use

• Affordable design

• Modular cartridge for ease of service

• Vent uses an O-ring for reliable operation

• Bronze body for durability

• Compact space saving design

• Satin chrome finish available

• Available with strainer

Installation

The 008PCQT is designed to be installed at the point of use.
When factory installed deck/machine mounted on machines or
equipment, the critical level of the 008PCQT shall be not less
than 1" (25mm) above the flood rim. If field applied for general
plumbing applications, the critical level of the 008PCQT shall
be a minimum of 6" (150mm) above the flood rim.

Specifications

A spill-resistant vacuum breaker (SVB) shall be installed, in
accordance with the manufacturer's instructions, as noted on
the plans. The valve shall consist of a one-piece modular
check and float assembly made of engineered thermoplastic
and housed in a bronze body. Springs shall be stainless steel.
The valve shall be constructed with a molded diaphragm sepa­rating the air inlet from the potable water supply to prevent
spillage. The valve shall be a Watts Series 008PCQT.

Contractor

Approval

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Contractor’s P.O. No.

Representative

Hood

Bonnet

O-ring

Vent
O-ring

Body

Retainer

Check
Assembly

Size: 3⁄8", 1⁄2" (10, 15mm)

Hood

Bonnet

O-ring

Vent
O-ring

Body

Retainer

Check
Assembly

3

Size:

⁄4", 1" (20, 25mm)

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FOR INDOOR USE!

008PCQT

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008PCQT-L (Left Handed)

008PCQT (Right Handed)

Hood Screws
(2 Required)

Vent
Spring

Shutoff
Valve Assembly
(2 Required)

Hood Screw

Vent
Spring

Shutoff
Valve Assembly
(2 Required)

Air Bleed Screw
Bleed O-ring
(not shown)

Test Cock

Air Bleed Screw
Bleed O-ring
(not shown)

Test Cock

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with­out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Materials

Springs: Stainless steel
Bonnet: PPO
Vent Disc: EPDM
Disc Holder: PPO
Check Disc: Silicone rubber
Body: Bronze

Pressure – Temperature

Temperature Range: 33°F – 180°F (0.5°C – 83°C)
Maximum Working Pressure: 150psi (10.3 bar)

End Connections

Female NPT - Ball Valve shutoffs

Capacity

As compiled from documented Foundation for Cross-Connection
Control and Hydraulic Research at the University of Southern
California lab tests.

*Typical maximum system flow rate (7.5 feet/sec.)

Standards

Meets requirements of IAPMO.

Approvals

isted by IAPMO, Approved by the Foundation for Cross-

L
Connection Control & Hydraulic Research at USC.

008PCQT-S

" min.

1

25mm)

(

Shutoff

64.1.2

B

1056

atts P60-M1

W
Pressure Reducing Valve

est cock

T

3

⁄4" (20mm) Hose

dapter with

A
strainer washer

Supply Hose

olenoid Valves

S

ispensing Inducers

D

Typical Installation

kPa psi

69 10

55 8

41 6

∆P

28 4

14 2

0 0

∆P

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 gpm
0 1.9 3.8 5.7 7.6 9.5

kPa psi

97 14

83 12

69 10

55 8

41 6

28 4

14 2

0 0

0 1 2 3 4 5 6 7 8 9 10 gpm
0 3.8 7.6 11.4 15.2 19 22.8 27 30 34 38 lpm

7.5 fps

2.3 mps

FLOW

Dimensions — Weights

2"

B

D

E

3

⁄8" (10mm)

FLOW

1

⁄2" (15mm)

*

Bs

11.4 13.3 15.2

Note: A strainer is recommended to be installed ahead of the backflow preventer to prevent the fouling of the check
assembly and resulting spillage from the valve during repressurization. Do not install in concealed locations or areas where
water leakage due to normal wear of the internal parts can cause damage.

008PCQT

in. mm in. mm in. mm in. mm lbs. kgs.

3

1

3

1 25 71⁄2 191 51⁄8 130 47⁄8 124 4.8 2.18

008PCQT-S

3

1

3

3

kPa psi

69 10

55 8

41 6

∆P

28 4

14 2

2", 21⁄2", 3" 288A

0 0

17.1

19 21 lpm

∆P

SIZE (DN) DIMENSIONS WEIGHT

BDE

0 5 10 15 20 25 30 gpm
0 19 38 57 76 95 114 lpm

FLOW

7.5 fps

2.3 mps

kPa psi

69 10

55 8

41 6

28 4

14 2

0 0

0 5 10 15 20 25 30 35 40 45 50 gpm
0 19 38 57 76 95 114 135 152 171 190 lpm

7.5 fps

FLOW

2.3 mps

⁄4" (20mm)

*

1" (25mm)

*

⁄8 10 51⁄2 140 315⁄16 100 31⁄8 79 1.6 .73
⁄2 15 53⁄4 146 43⁄16 106 33⁄8 86 1.7 .77
⁄4 20 7 178 45⁄8 117 41⁄2 114 3.8 1.72

Bs

⁄8 10 77⁄8 200 315⁄16 100 31⁄8 79 3.4 1.54
⁄2 15 81⁄2 216 43⁄16 106 33⁄8 86 3.5 1.59
⁄4 20 101⁄4 260 45⁄8 117 41⁄2 114 5.6 2.54

1 25 113⁄16 284 51⁄8 130 47⁄8 124 7.6 3.45

A Watts Water Technolo gies Company

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USA: No. Andover, MA • Tel: [phone] • Fax: [phone] • www.watts.com

Canada: Burlington, ON • Tel: [phone] • Fax: [phone] • www.wattscanada.ca

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