Watts Industries Powers HydroGuard LFLM495 Installation Instructions Download Page 1

Installation 

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1.    Locate suitable place for the tempering valve. Valves should 

be accessible for service and adjustment, and be as close to 

the point of use as possible.

2.   Bleed pressure from the system.
3.  Route copper tubing or piping to fit valve dimensions.
4.     For valves with PEX tailpieces see instructions on the  

next  page.  

5.    Remove tailpieces from the valve and make sure union nuts 

are over the tubing/piping before connecting to the tailpiece.

6.   Flush piping again, install valve using filter gasket on  

hot and cold water inlets and fiber gasket on mixed  

water outlet.

7.   Turn on the cold and hot water. If any leaks are observed,  

tighten connections as necessary to stop leak  

before proceeding.

HydroGuard

®

 Thermostatic Tempering Valves

LFLM495

IS-P-LM495-PEX 

Figure 1. 
Typical  
ASSE 1069 
Application

Cold

Hot

LFLM495

Mixed

LM495-4

COLD WATER

SUPPLY

POWERS SERIES LM495 OR 

LFLM495 WITH INTEGRAL 

CHECKS AND SCREENS

HOT WATER SUPPLY

Figure 2.
Single/Two 
Handle Faucet 
Application

Advanced  

Thermal Activation

WARNING

!

Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use infor-

mation can result in death, serious personal injury, 

property damage, or damage to the equipment.
Keep this Manual for future reference.

FAILURE TO COMPLY WITH PROPER INSTALLATION 

AND MAINTENANCE INSTRUCTIONS COULD 

CONTRIBUTE TO THE VALVE FAILURE, RESULTING IN 

INJURY AND/OR DEATH.
TO ENSURE THE ACCURATE AND RELIABLE OPERATION 

OF THIS PRODUCT, IT IS ESSENTIAL TO:

•    Properly design the system to minimize pressure and 

temperature variations.

•    This valve is not factory preset and can be adjusted 

to deliver scalding temperatures. 

Check outlet tem-

perature to ensure it does not exceed 105°F (41°C).

 

Make sure temperature limit stop is properly re-set to 

maximum 105°F (41°C) following valve maintenance or 

repair. Tampering with limit stop in any way may result 

in scalding temperature causing serious bodily harm 

and/or death.

WARNING

!

WARNING

!

Need for Periodic Inspection and Yearly Maintenance: 

 

Periodic inspection and yearly maintenance by a licensed 

contractor is required. Corrosive water conditions  

and/or unauthorized adjustments or repair could render  

the valve ineffective for service intended. Regular checking 

and cleaning of the valve’s internal components and check 

stops helps assure maximum life and proper product func-

tion. Frequency of cleaning and inspection depends upon 

local water conditions.

You are required to consult the local building and plumbing 

codes prior to installation.  If the information in this manual is 

not consistent with local building or plumbing codes, the local 

codes should be followed. Inquire with governing authorities for 

additional local requirements.

WARNING

!

WARNING

!

Flush all pipes thoroughly before installation. Installation and  

field adjustment are the responsibility of the installer. 

Installation Instructions

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