Fontana Black 2-Function Thermostatic Mixer FAQ
38°C Safety Calibration, Dual-Outlet Control & Concealed Valve Testing
This black concealed shower mixer combines automatic thermostatic regulation,
two independently controlled outlets, and a solid brass valve body for stable mixed-water delivery.
How should the 38°C thermostatic reference be calibrated?
Run the selected outlet until the mixed-water temperature stabilizes, verify the discharge with a calibrated thermometer, and reposition the control handle if the measured output differs from the 38°C index.
How should the two concealed outlet branches be commissioned?
Operate each outlet control independently, verify correct rough-in routing and stable flow, and confirm that the inactive branch remains isolated without pressure migration or internal cross-flow.
What supply preparation is required before cartridge operation?
Flush the hot and cold supplies independently, confirm hot-left and cold-right orientation, remove construction debris, and establish balanced inlet pressure before commissioning the thermostatic cartridge.
Which concealed joints require testing before wall closure?
Pressure-test the inlet unions, brass valve body, thermostatic cartridge housing, dual outlet-control valves, threaded seals, and both concealed outlet branches while all connections remain visible.
