How to adjust the Gerber Single Handle Shower Temp Limit Device for normal installation or Back to Back installation

For Gerber Single Handle Shower valves models:
GS-303, GS-305,
GH-301, GH-305,
GS-310, GS-311, GS-312, , GS-315, GS-315-PK, GS-313, GS314, GS-317, GS-325 

Cartridge # G0097058
 

Cartridge # G0097232	Cartridge # G0097231	Cartridge # G0091409

Cartridge # GA507978, or GA507978	Dimple is indicated by the red arrow	Cartridge # GA507047

1. Make sure that the water is shut off  before you start
   (either by closing the check valves on the brass shower valve itself clockwise or by closing the main supply lines hot and cold).
   
   
2. Remove bonnet nut or base nut after you remove handle by turning it counter clockwise by hand.
   If there is no bonnet nut (in old models), then the temp limit device will be exposed. There is no need to remove any other part to adjust the temp limit device.
   
   
3. Make sure the stem is positioned where the stopper of the cartridge is on the left as shown below.
   
   Pull out the 2 gears (old version was white and off white or white and gray or white and black). New version is Blue and Red.
   
   
   
4. Ensure that the dimple on cartridge brass stem is facing UP (if hot line is on your left hand side when facing the shower).
   
   ****For Back to Back installation or if supply lines are reversed (hot line is on your right hand side when facing the shower), then the dimple or (indentation) is supposed to be down facing the floor.
   
   OR
   
   if you get hot first when turning the shower handle on, then dimple has to be reversed 180º.****
   
   
5. Place the blue cam on the stem, positioning the flat side against the stopper from the bottom. Place the red cam on top. Position it so that both tapered end meets each other in one line as shown below. Note: This setting will allow for maximum hot water.
   
   
6. For cooler water, rotate the red cam (hot) counterclockwise to set desired temperature.
   
   
7. Temp Limit device assembled for max hot
   
   
   
   
8. Then push the 2 gears to shower cartridge (Blue or white gear is always on the bottom).
   
   
9. Once the desired temperature is set, reinstall the lock nut over the cartridge. Tighten with an adjustable wrench between 10 and 14 ft-lbs of torque.

For Gerber Shower Valve model 49-400 or 49-700 Series:

Cartridge # G0097022

There is a factory temperature preset which can be changed by removing the Limit Device or Stop..

1. Pull out the Temp Limit device.
   
   
2. Rotate the limiter counter clockwise for Cold and Clockwise for Hot.
   
   
3. For back-to-back installation, or (if hot is on your right-hand shower when facing the shower), Brass stem has to be rotated 180º as shown below:

For Gerber Shower Valve model 49-600 or 49-800 Series:

Cartridge # G0092298

There is a factory temperature preset which can be changed by removing the Limit Stop.

1. Pull out the Temperature Limit Stop.
2. Rotate the limiter Clockwise for Cold (-) and Counter Clockwise for Hot (+) as below:
   
3. For Back to Back instillation or (if hot is on your right hand shower when facing the shower),
   a. Turn off the water supply and relieve pressure from the valve.
   b. Remove Bonnet, retainer washer, Ceramic cartridge, and Entire pressure balancing spool from the valve body.
   c. Flip / Push/ Rotate the black tab over the opposite side of the body.
   d. Re-assemble the valve body.

For Gerber Shower Valve model GS-103 or GS-105 Series:

 
Cartridge # G0095154

There is a factory temperature preset which can be changed by removing the Limit Device or Stop.

1. Unscrew the Cap or Bonnet nut from the valve body.
2. Remove the Red or metallic Limit Stop with long-nose pliers. Pull out from the body assembly.
3. Observe the Limit Stop: Notice the (+) and the (-) signs. These indicate the amount of hot water which is allowed to flow.
4. If it is too hot, turn the Temp Limit Device clockwise.
   If it is too cold, turn the Temp Limit Device counter clockwise.
   
5. For back to back installation or (if hot is on your right hand shower when facing the shower):
   a. Remove the Cap or bonnet nut from the valve body.
   b. Remove the Clip from the brass stem.
   c. Remove the Stem Ring from the assembly.
   d. Rotate the stem 180º.
   e. Insert the Stem Ring onto the assembly (making sure that the flat side is facing you).
   f. Snap the Clip back onto the brass stem.
   g. Operate shower valve and test it.