The 145.4420 Thermostatic valve features 3/4″ NPT connections and has 2 water outputs [ports] which are operable one at a time without shared port operation. This product meets CAL-Green Compliance. There are 3 settings or positions on the top handle of this product. They are as follows:
Position 1 – Output 1 Active
Position 2 – Output 2 Active
Position 3 – OFF – No Water Flow
The bottom handle sets the temperature.
Supply Stops – There are two safety stops at each water inlet to prevent water flow in case of installation and repairs.
Handle Operation – The bottom handle is used to control the temperature of water flowing through the outlet. The top handle is capable of controlling the volume of water from full flow to a trickle by turning from OFF position to either 1 or 2
As the valve is installed, care should be taken to maintain proper distance from the back of the valve to the finished tile which should be between 2.77 and 3.44 inches [Rough In Spec]. Also the value must be installed straight and not at an angle or upside down. In case, the tile is thicker or valve is installed in the wall is too deep, extension kits are available and can be used for elongating both handles of the valve.
Cut Out Dimensions – The cut out in wall should be 6.49 X 4.44 Inches and no more this will ensure that the trim plate will cover the cut out hole in the wall.
Trims – The trims comprise of a well finished cover plate and handle knobs. The trim plate is used to cover the wall and has markings for 1/OFF/2 and HOT/COLD. Over the temperature control knob, is an anti-scald temperature stop ring which is a safety feature in this thermostatic value. With the help of this ring, temperature of the water is regulated. Covering this ring is the handle knob which has a push button on the side. In order to adjust the water temperature, one needs to press this button and move the handle to hot or cold direction. Without pressing it, the user will not be able to rotate the handle to the full HOT position as an anti-scald prevention mechanism. The anti-scald temperature stop ring should be fitted tightly over the valve (tapping using a rubber mallet might be required) for it to function properly.
Depending upon the shower model, trims can be of different shape and size, varying from square to circular shower handles.