Watts S8C User Manual

For Health Hazard Applications

Job Name Contractor Job Location Approval Engineer Contractor’s P.O. No. Approval Representative

Series S8C

No. S8

Backflow Preventer for

Tub and Shower Hand

Spray Sets

Series S8C is a unique device specially made for use with tub and shower hand spray sets. Attachment threading complies with standard production shower heads and spray hose sets and the installation requires no plumbing changes. The device is screwed directly between shower head and hose. Its purpose is to prevent the flow of contaminated water back into the potable water supply. Maximum pressure 125 psi (8.6 bar). Maximum temperature 180°F (82°C).

ES-S8C

MODELS

No. S8C - Polished Chrome Finish

Inlet Connection: Sizes 3⁄8" or 1⁄2" (10 or 15mm)

NPTF standard female pipe thread. Outlet Connection: Size 1⁄2" (15mm) NPTM standard male pipe thread.

No. S8 - Plain Brass

Inlet Connection: Sizes 3⁄8" or 1⁄2" (10 or 15mm)

NPTF standard female pipe thread. Outlet Connection: Size 1⁄2" (15mm) NPTM standard male pipe thread.

Adapter

FEATURES

• Polished chrome or brass finish

• Stainless steel working parts for longevity

• Durable rubber diaphragm and disc provides positive seating

• Compact size

SPECIFICATIONS

For ANTI-SIPHON VACUUM BREAKERS A hose connection type anti-siphon vacuum breaker shall be

installed where indicated on the plans to prevent the back siphonage of contaminated water. The valve shall have a polished chrome finish and solid brass body. Internal components shall be stainless steel and plastic for corrosion resistance. Valve shall have resilient seating in both the check and air inlet seats. The valve shall be ASSE approved and shall be a Watts Regulator Company Series S8C.

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.

Spring

Disc

Stem

INLET

▲

Brass Body

Washer

Pressure Plate

Diaphragm

▲

OUTLET

CAPACITY

kPa psi

276 40 241 35 207 30

172 25 138 20 103 15

69 10 34 5

012345678910gpm 0 3.8 7.6 11.4 15.2 19 22.8 26.6 30.4 34.2 38 lpm

Do not install where occasional discharge of water would be objectionable or cause damage.

STANDARDS

⁄2" (15mm) No. S8C and S8 are tested and certified under ANSI A1121.3 (ASSE 1011). This valve is not suitable for continuous pressure and is not protection against backpressure.

Listed by IAPMO.

INSTALLATION

Spray Hose

Control Valve To Shower Head Or Spray Hose

Shower Head

No. S8 or S8C

Backflow Preventer

Spray Head (Removable

for use as hand spray)

IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES FOR LOCAL INSTALLATION REQUIREMENTS.

DIMENSIONS - WEIGHT

11⁄4" 32mm

Weight 3.75 ounces

17⁄16" 37mm

MATERIAL SPECIFICATIONS

Brass body, stainless steel working parts, durable rubber diaphragm and disc.

OPERATION

Diaphragm Seals Air Inlet

Diaphragm at Rest

Flow

To Shower

Head

Flow

Check Spring

Air Inlet Closed

Check Disc

Check Closed

Air Inlet Open