Watts CS User Manual
Series CS
Check Stop Valves
Sizes: 1⁄2", 3⁄4", 1" (15, 20, 25mm)
Series CS check stop valves are designed for use at the hot
and cold water inlet supplies for mixing and tempering valves.
Series CS valves perform triple duty as: 1) isolation valves,
2) check valves, and 3) strainers. The union connections
facilitate service and maintenance of both the valve and the
strainer.
Series CS valves protect against cross flow of hot and cold
water in the system and provide isolation of the mixing or
tempering valve during servicing and maintenance of the valve
and strainer. The integral fine strainer protects the valve from
damaging dirt and other debris.
Features
• Performs triple duty as: 1) check valve, 2) shutoff
valve, and 3) strainer
• Check valve function protects against hot and cold
water supply cross flow.
• Shut-off function facilitates mixing valve service and
strainer maintenance
• Strainer protects mixing valves from dirt and other
debris
• Universal design eliminates left-hand/right-hand
confusion
Materials
Body: Bronze
O-rings: EPDM
Strainer: Stainless steel
Spring: Stainless steel
Disc: EPDM
Screw: Brass
For Mixing Tempering Valve Applications
ES-CS
Job Name
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Contractor
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Job Location
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Approval
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Engineer
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Contractor’s P.O. No.
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Approval
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Representative
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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.
Specifications
Series CS combination check/stop/strainer valve shall be used
at the hot and cold water inlets to the Watts L111 and MMV
mixing valves. The combination check stop valve(s) shall be a
Watts model CS/CSC (chrome plated), as indicated on the
installation plans. The combination check stop valve(s) shall be
of bronze construction, incorporating materials suitable for its
intended use. The check stop valve(s) shall be fitted with a
strainer to prevent large particulate matter from entering the
valve. The check stop valve shall be fitted with a union connection to facilitate the removal of the mixing valve and the servicing of the strainer. The check stop valve(s) inlet connection shall
be solder (-S)/threaded (-T). The outlet connection shall be
solder (-US)/threaded (-UT). The check/stop/strainer valve(s)
used shall be the Watts Series CS Check Stop valve.
Pressure – Temperature
Maximum Working Pressure: 150psi (10.3 bar) at 225°F (107°C)
CS-T-UT
CS-S-UT
ES-CS 0636 © Watts Regulator Company, 2006
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Water Safety & Flow Control Products
Installation
SIZE (DN)
MODEL INLET OUTLET DIMENSIONS WEIGHTS UNION
A B D E Inlet Outlet
in. mm in. mm in. mm in. mm in. mm in. mm oz. gr.
CS-S-UT
1
⁄2 15
1
⁄2 15 27⁄8 73
15
⁄16 59
13
⁄16 30 21⁄4 57 12 340 solder MNPT
CS-T-UT
1
⁄2 15
1
⁄2 15 27⁄8 73
15
⁄16 59
13
⁄16 30 21⁄4 57 12 340 FNPT MNPT
*CSC-S-UT1⁄2 15
1
⁄2 15 27⁄8 73
15
⁄16 59
13
⁄16 30 21⁄4 57 12 340 solder MNPT
*CSC-T-UT1⁄2 15
1
⁄2 15 27⁄8 73
15
⁄16 59
13
⁄16 30 21⁄4 57 12 340 FNPT MNPT
CS-S-US
3
⁄4 20
3
⁄4 20 3 76 211⁄16 68 13⁄8 35 25⁄16 59 17 482 solder solder
CS-T-UT
3
⁄4 20
3
⁄4 20 31⁄4 83 211⁄16 68 13⁄8 35 29⁄16 65 17 482 FNPT MNPT
*CSC-S-US3⁄4 20
3
⁄4 20 3 76 211⁄16 68 13⁄8 35 25⁄16 59 17 482 solder solder
*CSC-T-UT3⁄4 20
3
⁄4 20 31⁄4 83 211⁄16 68 13⁄8 35 29⁄16 65 17 482 FNPT MNPT
CS-T-UT 1 25 1 25 4 102 31⁄8 79 111⁄16 43 31⁄8 79 27 765 FNPT MNPT
*CSC-T-UT 1 25 1 25 4 102 31⁄8 79 111⁄16 43 31⁄8 79 27 765 FNPT MNPT
*Chrome plated
A
D
E
B
Dimensions – Weights
A
D
E
B
CS-T-UT
CS-S-UT
Cold Water
Supply
Hot Supply
Hot Water
Supply
Watts 1170
or N170
mixing valve
(optional)
Alternate
Piping
Strainer
Check
Valve
Isolation
Ball Valve
Hot
Isolation
Ball Valve
(optional)
Isolation
Ball Valve
(optional)
To Fixture
L111
Model CS
(2 required)
Cold
Hot
To Fixture
MMV
Model CS
(2 required)
Cold
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