THIS VALVE MEETS OR EXCEEDS THE  
FOLLOWING STANDARDS:  
ASME A112.18.1/CSA B125.1 and ASSE 1016.
CAUTION: This system/device must be set by the 
installer to ensure safe, maximum temperature. 
Any change in the setting may raise the discharge 
temperature above the limit considered safe and 
may lead to hot water burns. 
NOTICE TO INSTALLER: CAUTION!–As the 
installer of this valve, it is your responsibility 
to properly INSTALL and ADJUST this valve 
per the instructions given. This valve does 
not automatically adjust for inlet temperature 
changes, therefore, someone must make the 
necessary Rotational Limit Stop adjustments at 
the time of installation and further adjustments 
may be necessary due to seasonal water 
temperature change. YOU MUST inform the 
owner/user of this requirement by following the 
instructions. If you or the owner/user are unsure 
how to properly make these adjustments, please 
refer to pages 9 and 15 and if still uncertain, call 
us at 1-800-345-DELTA.
After installation and adjustment, you must affix 
your name, company name and the date you 
adjusted the Rotational Limit Stop to the caution 
label provided and apply or attach the label to 
the back side of the closest cabinet door and 
the warning label to the water heater. Leave 
this Instruction Sheet for the owner’s/user’s 
reference.
WARNING: This pressure balanced bath 
valve is designed to minimize the effects 
of outlet water temperature changes due to 
inlet pressure changes, commonly caused by 
dishwashers, washing machines, toilets and 
the like. It may not provide protection from hot 
water burns when there is a failure of other 
temperature controlling devices elsewhere 
in the plumbing system, if the rotational limit 
stop is not properly set or if the hot water 
temperature is changed after the settings 
are made or if the water inlet changes due to 
seasonal changes.
WARNING: Do not install a shut-off device on 
either outlet of this valve. When this type of 
device shuts off the water flow, it can defeat 
the ability of the valve to balance the hot and 
cold water pressures.
Table of Contents:
Warranty ............................................................................. Page 2
18 Series Installation Instructions
   Separate Units ..................................................................Pages 3 - 9
   Single Units ...................................................................... Pages 10 - 15
Maintenance ....................................................................... Page  16
Replacement Parts ............................................................. Pages 17 - 24
1
You May Need
1/10/12
51915 Rev. D