Watts LFCS User Manual

For Mixing Tempering Valve Applications

ES-LFCS

Job Name

Job Location

Engineer

Approval

LEAD FREE

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*

Model LFCS

Check Stop Valves

Sizes: 1⁄2"

Model LFCS check stop valves are designed for use at the hot and
cold water inlet sup plies for mixing and tem per ing valves. Model
LFCS valves perform triple duty as: 1) iso la tion valves,

2) check valves, and 3) strain ers. The union con nec tions
facilitate service and main te nance of both the valve and the
strainer.

Model LFCS valve protects against cross flow of hot and cold
water in the system and provide isolation of the mixing or
tem per ing valve during ser vic ing and main te nance of the valve
and strain er. The integral fine strainer protects the valve from
dam ag ing dirt and other debris.The Model LFCS valve features
Lead Free* construction to comply with Lead Free* installation
requirements.

Contractor

Approval

Contractor’s P.O. No.

Representative

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LFCS-T-UT

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 ser vice and
strainer maintenance

• Strainer protects mixing valves from dirt and other
debris

• Universal design eliminates left-hand/right-hand
confusion

Materials

Body: Lead Free* Copper Silicon Alloy
O-rings: EPDM
Strainer: Stainless steel
Spring: Stainless steel
Disc: EPDM
Stem: Lead Free* Brass

Specifications

LFCS combination check/stop/strain er valve shall be used at the

hot and cold wa ter inlets to the Watts LFL111 and LFMMV mix ing
valves. The combination check stop valve(s) shall be a Watts model
LFCS, as in di cat ed on the installation plans. The combination check
stop valve shall be of lead free con struc tion. Lead Free* check stop
shall comply with state codes and standards, where applicable,
requiring reduced lead content. The check stop valve shall be fit ted
with a strainer to pre vent large par tic u late mat ter from entering the
valve. The check stop valve shall be fitted with a union con nec tion
to fa cil i tate the re mov al of the mixing valve and the ser vic ing of the
strain er. The check stop valve inlet connection shall be threaded

(-T). The outlet connection shall be threaded (-UT). The check/stop/

strainer valve(s) used shall be the Watts LFCS Check Stop valve.

Pressure – Temperature

Maximum Working Pressure: 150psi (10.3 bar) at 225°F (107°C)

*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.

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.

Installation

Alternate

Model LFCS
(2 required)

Cold W

ater

Supply

Hot Supply

Piping

Strainer

Check

Valve

Isolation
Ball Valve

Hot

Isolation
Ball Valve
(optional)

To Fixture

LFL111

Model LFCS
(2 required)

Cold

Hot

To Fixture

LFMMV

Cold

Hot Water

Supply

Watts LF1170F

or LFN170

mixing valve

(optional)

Isolation
Ball Valve
(optional)

Dimensions – Weight

B

D

LFCS-T-UT

SizE (DN)
moDEl iNlEt outlEt DimENSioNS WEightS uNioN

A B D E Inlet Outlet

in. in. mm in. mm in. mm in. mm in. mm oz. gr.

CS-T-UT

1

1

⁄2

⁄2 15 27⁄8 73 15⁄16 59 13⁄16 30 21⁄4 57 12 340 FNPT MNPT

E

A

A Watts Water Technologies Company

USA: Tel: [phone] • Fax: [phone] • www.watts.com

Canada: Tel: [phone] • Fax: [phone] • www.watts.ca

ES-LFCS 1335 © 2013 Watts