Watts LF7R User Manual

For Light Commercial and Residential Applications

ES-LF7R

Job Name

Job Location

Engineer

Approval

LEAD FREE

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Series LF7R

Dual Check Valves

LF7R Sizes: 1⁄2" – 1" (15 – 25mm)

Series LF7R Dual Check Valves are designed for non-health hazard residential water system containment and continuous pressure applications, such as the drinking water supply service entrance or individual outlets. Series LF7R uses two compact replaceable check modules and is installed immediately downstream of the residential water meter. The LF7R features Lead Free* construction to comply with Lead Free* installation requirements.

Features

• Can be installed vertically or horizontally

• Available with combination of inlet/outlet sizes, types or

thread and end connection

Specifications

The dual check backflow preventer shall meet the domestic

requirements of ANSI/ASSE Standard 1024, and bear the seal of approval. It shall be Lead Free* cast copper silicon alloy bodied and include not less than one union. An iden-

tification tag indicating direction of flow shall be securely attached to the valve body. The Lead Free* Dual Check Valve shall comply with state codes and standards, where applicable, requiring reduced lead content. The dual check shall be Watts Series LF7R. (Please select the model best suited to your application.)

Pressure - Temperature

Temperature Range: 33˚F – 180˚F (0.5˚C-82˚C) continuous Maximum Working Pressure: 175psi (12.07 bar)

Approvals

Contractor

Approval

Contractor’s P.O. No.

Representative

Series LF7R: Inlet/Outlet Connections – Types available,

ordering code, sizes available.

CONNECTION CONNECTION SIZES AVAILABLE TYPE CODE

in. mm

National Pipe Thread Female 2 National Pipe Thread Male 3 Female Meter Thread (Swivel) 10 Union (U) Connections available on all inlet/outlet types and sizes.

When ordering Series LF7R Valves with Meter Thread Connections, be sure to order connection size one size

larger than meter thread. Examples:

Meter Size Order

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LF7R

⁄2 , 3⁄4, 1 15, 20, 25

⁄4, 1 20, 25

⁄8" (16mm) x 1⁄2" (15mm)

⁄8" (16mm) x 3⁄4" (20mm) 1" (25mm)

⁄4" (20mm) x 3⁄4" (20mm) 1" (25mm)

⁄4" (20mm)

1024

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.

Capacity

10.0

9.0

8.0

7.0

6.0

PSI

5.0

Loss

4.0

3.0

2.0

1.0

0.0 0 1 2 3 4 5 6 7 8 9 10 11

0.0 3.8 7.8 11.4 15.1 19.0 22.7 26.5 30.3 34.1 37.8 41.6

10.0

9.0

8.0

7.0

6.0

PSI

5.0

Loss

4.0

3.0

2.0

1.0

0.0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

0.0 7.8 15.1 22.7 30.3 37.8 45.4 52.9 60.5

10.0

9.0

8.0

7.0

6.0

PSI

5.0

Loss

4.0

3.0

2.0

1.0

0.0

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

0.0 15.1 30.0 45.4 60.5 75.7 90.8

⁄2" (15mm) LF7R

⁄4" (20mm) LF7R

1" (25mm) LF7R

GPM LPM

Materials

• Body: Lead Free* copper silicon alloy

• Check Modules: Engineered plastic

• Discs: Santoprene

• Seals: EPDM

• Springs: Stainless steel

* The wetted surface of this product contacted by consumable water

contains less than one quarter of one percent (0.25%) of lead by weight.

Dimensions - Weight

LF7RU2-U2

MODEL SIZE (DN) DIMENSIONS WEIGHT

A B

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

LF7RU2-2

1 25 3 LF7RU2-U2 LF7RU10-U2 1 25 4 LF7RU10-U3 1 25 4

A Watts Water Technologies Company

⁄2 15 35⁄8 92 17⁄8 48 .7 .32

⁄4 20 35⁄8 92 17⁄8 48 .7 .32

⁄4 20 311⁄16 93 17⁄8 48 .9 .41

⁄8 99 17⁄8 48 .8 .36

⁄2 114 17⁄8 48 1.7 .77

⁄16 122 17⁄8 48 1.7 .77

USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com

Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca

LF7RU10-U2