Fontana Oil Rubbed Bronze Thermostatic 2 Knob 3 Way Mixing Valve FAQ
Supply Flushing, Thermostatic Calibration & Three-Way Diverter Testing
This oil rubbed bronze concealed shower mixer combines pressure-balanced thermostatic
regulation, dual-handle operation, a ceramic cartridge, and three-way outlet distribution.
Why must the hot and cold supply lines be flushed before valve connection?
Independent flushing removes pipe scale, solder residue, joint compound, and construction debris that could obstruct the inlet passages, damage the ceramic cartridge, or reduce thermostatic response accuracy.
How should the thermostatic cartridge and temperature limit stop be calibrated?
Operate the mixer under stable flow, measure the discharged water with a calibrated thermometer, and adjust the cartridge and integral limit stop before aligning and securing the temperature-control knob.
How should the three-way diverter be tested before the finished wall is closed?
Identify, flush, and pressure-test the rainfall shower, hand-shower, and spout branches independently, then cycle every diverter position to confirm positive indexing without cross-flow or concealed leakage.
What should be checked when installing the oil rubbed bronze trim plate?
Position the concealed brass body from the final finished-wall plane so the faceplate seals evenly and both control knobs engage correctly without rubbing, excessive projection, or interference from tile and waterproofing layers.
