Fontana Gun Metal Gray 3-Function Thermostatic Mixer FAQ
Multifunction Routing, 1.38-Inch Ceramic Control & Concealed Valve Testing
This gun metal gray wall-mounted shower mixer combines a solid brass concealed valve,
a 1.38-inch ceramic cartridge, and multifunction hot-and-cold water control.
How should the concealed outlet branches be coordinated during rough-in?
Route and label each 1/2-inch outlet for its assigned shower function, then confirm correct control-to-outlet indexing before waterproofing, trim installation, and finished-wall closure.
How should the ceramic cartridge be commissioned after supply flushing?
Flush the hot and cold lines independently, install the 1.38-inch ceramic cartridge only after debris removal, and cycle the control throughout its 20–50°C operating range.
How should inactive-outlet isolation be verified under pressure?
Operate each function independently at normal supply pressure and confirm that inactive branches remain sealed without dripping, cross-flow, pressure migration, or unintended discharge.
Which concealed components require testing before wall closure?
Pressure-test the solid brass valve body, hot and cold inlets, ceramic cartridge chamber, multifunction control seals, and every 1/2-inch outlet connection while fully accessible.
