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Fontana Brio PrimeSense™ Line FS-1095GMG Gun Metal Gray Touchless Bathroom Faucet: Single-Hole Deck Mount Detail

This single-hole deck-mount installation-detail resource is intended to support architects, plumbing engineers, electrical engineers, interior designers, countertop fabricators, millwork contractors, installers and facility managers coordinating the Fontana Brio PrimeSense™ Line FS-1095GMG touchless bathroom faucet within commercial and institutional washrooms. The drawing communicates the relationship between the faucet body, single mounting opening, rubber gasket, mounting washer, lock nut, threaded mounting stem, finished countertop, countertop substrate, basin, braided water hoses, mixing valve, solenoid valve, control box, sensor cable and power components.

Fontana Brio PrimeSense™ Line FS-1095GMG Touchless Bathroom Faucet

The Fontana FS-1095GMG is a single-hole deck-mounted touchless bathroom faucet with a Gun Metal Gray finish and infrared automatic activation. The faucet passes through a Ø35–38 mm countertop opening and is secured below the deck with a rubber gasket, mounting washer and lock nut. The concealed installation includes hot- and cold-water hoses, a factory pre-set mixing valve, solenoid valve, sensor cable, electronic control box and AC or battery power arrangement.

  • Model: FS-1095GMG
  • Product type: Touchless bathroom faucet
  • Installation: Single-hole deck mount
  • Finish: Gun Metal Gray
  • Operation: Infrared touchless activation
  • Mounting-hole diameter: Ø35–38 mm [1-3/8"–1-1/2"]
  • Faucet-base diameter: Ø54 mm [2-1/8"]
  • Maximum countertop thickness: 35 mm [1-3/8"]
  • Water inlet: G1/2" hot and cold
  • Operating pressure: 0.2–5.0 bar [2.9–72.5 PSI]
  • Flow rate: 1.2 GPM [4.5 L/min] at 60 PSI
  • Sensor range: 16–32 cm adjustable
  • Power supply: 220–240V AC or 4 × 1.5V AA batteries
  • Mixing: Factory pre-set mixing valve
  • Recommended service clearance: 300 mm [12"] minimum
Product Page Installation Guide

Required Single-Hole Deck Mount Drawing Package

The single-hole deck-mount drawing should clearly document the faucet centerline, finished countertop, countertop substrate, Ø35–38 mm mounting opening, Ø54 mm faucet base, rubber gasket, mounting washer, lock nut, threaded mounting stem, sensor cable, braided hot- and cold-water hoses, mixing valve, solenoid valve, electronic control box and power connections. The relationship between the faucet outlet, basin and under-counter equipment should be coordinated before countertop fabrication.

Complete Single-Hole Deck Mount Section

Shows the complete FS-1095GMG installation from the Gun Metal Gray faucet above the countertop through the mounting hardware and concealed plumbing and electronic system below. The section provides the primary installation reference for countertop fabrication, plumbing rough-in and final fixture mounting.

Single-Hole Mounting Opening

Provide a Ø35–38 mm [1-3/8"–1-1/2"] circular opening through the countertop. The opening should be clean, centered on the approved faucet location and coordinated with the basin and concealed under-counter components.

Faucet Base Diameter

The faucet-base bottom view identifies an approximate Ø54 mm [2-1/8"] footprint. The finished countertop should provide a continuous flat bearing surface around the mounting opening so the base and gasket can seat evenly.

Finished Countertop

Shows the finished stone, solid-surface or other approved deck supporting the faucet. The mounting area should be flat and level and should not contain seams or irregularities that prevent proper gasket seating.

Countertop Substrate

Identifies the structural countertop material through which the threaded mounting stem passes. Coordinate stone reinforcement, plywood build-up and support members so they do not obstruct the mounting washer or lock nut.

Maximum Countertop Thickness

The installation detail identifies approximately 35 mm [1-3/8"] as the maximum countertop thickness. All finish, substrate and reinforcement layers should be included when verifying mounting-stem engagement.

Rubber Gasket

Shows the sealing gasket positioned between the faucet base and countertop. The gasket should sit flat and concentric with the mounting opening before the faucet is secured from below.

Mounting Washer

Identifies the underside washer installed over the threaded mounting stem. The washer distributes the retaining load over the underside of the countertop and contributes to stable faucet mounting.

Lock Nut

Shows the retaining nut threaded onto the faucet mounting stem below the washer. Hand-tighten securely to prevent faucet movement while avoiding excessive torque.

Threaded Mounting Stem

The threaded stem extends through the countertop opening and receives the mounting washer and lock nut below the deck. It should remain vertical and centered during tightening.

Faucet Centerline

Coordinate the mounting-hole centerline with the basin so the spout outlet projects into the usable bowl area and the sensor remains positioned for reliable hand detection.

Spout-to-Basin Clearance

The drawing identifies a minimum approximately 50 mm [2"] clearance between the faucet spout and basin edge. Final positioning should also consider basin geometry and splash control.

Infrared Sensor

The touchless sensor is integrated into the faucet assembly and connects to the under-counter controller. Keep the sensor orientation and basin relationship consistent with the approved installation drawing.

Sensor Cable

Route the sensor cable from the faucet to the control box without kinking, pinching or sharply bending the cable. Keep it clear of moving cabinet hardware and plumbing connections.

Hot-Water Braided Hose

The hot-water hose connects the G1/2" hot-water angle stop to the mixing assembly. Maintain a smooth routing radius and provide access to both connection points.

Cold-Water Braided Hose

The cold-water hose connects the G1/2" cold-water angle stop to the mixing valve. Do not twist, stretch or sharply bend the braided connection.

Factory Pre-Set Mixing Valve

Shows the mixing valve receiving the hot- and cold-water supplies and providing mixed water to the touchless faucet system. The valve should remain accessible after cabinet completion.

Solenoid Valve

Identifies the electronically controlled water valve connected to the control box. The solenoid responds to sensor commands to start and stop faucet flow automatically.

Control Box

Mount the electronic control box in a dry and accessible location below the countertop. Maintain access to cable connections, solenoid wiring and power connections for commissioning and service.

Power Cable

The control system may be powered using the approved AC adapter or battery configuration. Locate electrical components away from potential water leakage and standing moisture.

Waterproof Cable Grommet

Where electrical cables pass through cabinet material or supporting construction, provide the sealed cable penetration shown in the drawing to protect the cable and limit moisture migration.

Angle Stop Valves

Provide separate accessible hot- and cold-water shutoff valves. The angle stops are shown as project-supplied components and should remain reachable for fixture isolation and maintenance.

Under-Counter Service Clearance

Maintain approximately 300 mm [12"] minimum recommended service clearance beneath the countertop for access to hoses, valves, controller connections and faucet mounting hardware.

Engineering note: Do not release the countertop for fabrication based on nominal dimensions alone. Confirm the Ø35–38 mm mounting-hole requirement, Ø54 mm faucet-base footprint, maximum countertop thickness, mounting-hardware arrangement, basin relationship, hose lengths, cable reach and required under-counter service area using the approved FontanaShowers submittal and installation documentation.

Single-Hole Mounting Detail

Ø35–38 mm Mounting Hole

Prepare a circular opening between Ø35 mm and Ø38 mm [1-3/8"–1-1/2"] as identified in the deck-mount detail.

Ø54 mm Faucet Base

The faucet-base bottom view indicates an approximate Ø54 mm [2-1/8"] footprint around the mounting stem and internal connection area.

Centerline Coordination

Establish the faucet centerline before drilling so the spout, basin and concealed plumbing equipment remain correctly aligned.

Flat Mounting Surface

The finished countertop must provide a flat and level mounting surface for even gasket seating and stable faucet installation.

Maximum Deck Thickness

Coordinate the complete countertop build-up so the finished deck thickness does not exceed the mounting capability shown in the approved installation detail.

Under-Counter Accessibility

The mounting washer and lock nut must remain accessible beneath the deck so the faucet can be tightened, inspected or removed without damaging the countertop.

Recommended Single-Hole Installation Sequence

1. Drill the Mounting Hole

Mark the approved faucet centerline and prepare a Ø35–38 mm [1-3/8"–1-1/2"] opening through the finished countertop. Clean the opening before inserting the faucet.

2. Place Faucet with Rubber Gasket

Position the rubber gasket against the faucet base and lower the threaded stem, hoses and sensor cable through the prepared mounting opening.

3. Install Mounting Washer

From below the countertop, slide the mounting washer over the threaded stem and position it flat against the countertop substrate.

4. Hand-Tighten Lock Nut

Thread the lock nut onto the mounting stem and tighten until the faucet is secure. Confirm the faucet remains aligned with the basin before final tightening.

5. Connect Hoses and Cables

Connect the hot- and cold-water hoses, mixing valve, solenoid valve, sensor cable, control box and selected power source according to the approved connection arrangement.

Mounting Hardware Identification

Rubber Gasket

Installed beneath the faucet base to provide a uniform seating surface and help limit moisture penetration through the mounting opening.

Mounting Washer

Installed against the underside of the countertop to spread the clamping force produced by the retaining nut.

Lock Nut

Threads onto the mounting stem and secures the faucet assembly to the countertop. Tighten sufficiently to prevent fixture movement without overloading the countertop.

Threaded Mounting Stem

Passes through the countertop and receives the washer and retaining nut while providing a concealed route for faucet hoses and control connections.

Architectural and Plumbing Coordination Considerations

Countertop Fabrication

Coordinate the Ø35–38 mm hole before fabrication and confirm that countertop reinforcement, seams and sink clips will not obstruct the mounting hardware.

Basin Coordination

Position the faucet so the water outlet directs flow into the usable basin area while maintaining the minimum clearance indicated on the drawing.

Millwork Coordination

Cabinet shelves, drawers, structural rails and partitions should not block the mounting hardware, hoses, mixing valve, solenoid valve, controller or service area.

Plumbing Coordination

Maintain access to the G1/2" hot- and cold-water angle stops, mixing valve and solenoid connections for installation and future maintenance.

Electrical Coordination

Locate the controller, power adapter or battery system in a dry, accessible area and route control cables away from plumbing joints and potential leakage points.

Maintenance Coordination

Provide sufficient working space beneath the countertop to access the lock nut, braided hoses, valve assembly, control box and electrical connectors.

Single-Hole Deck Mount Installation Notes

  • Countertop condition: The countertop mounting area should be flat and level.
  • Mounting-hole diameter: Provide Ø35–38 mm [1-3/8"–1-1/2"] as shown.
  • Maximum countertop thickness: The drawing indicates approximately 35 mm [1-3/8"].
  • Rubber gasket: Seat the gasket evenly beneath the faucet base before tightening the mounting hardware.
  • Lock nut: Hand-tighten securely and do not overtighten.
  • Hoses and cables: Route connections without sharp bends, kinks or compression.
  • Isolation valves: Install accessible hot- and cold-water shutoff valves for future maintenance.
  • Waterproof penetrations: Seal required cable and cabinet penetrations against moisture.
  • Leak testing: Verify all hydraulic connections for leakage after the faucet is installed and pressurized.

Technical Performance Information

Power Supply

220–240V AC or 4 × 1.5V AA batteries according to the project power configuration.

Water Connections

G1/2" hot- and cold-water supply connections feed the factory pre-set mixing assembly.

Operating Pressure

The drawing identifies an operating range of approximately 0.2–5.0 bar [2.9–72.5 PSI].

Recommended Water Temperature

The installation sheet indicates a recommended temperature range of approximately 5°C–70°C [41°F–158°F].

Flow Rate

Nominal flow performance is identified as 1.2 GPM [4.5 L/min] at 60 PSI.

Sensor Range

The infrared sensing range is identified as approximately 16–32 cm and is adjustable during commissioning.

Single-Hole Deck Mount Component Identification

  • Touchless faucet body: Visible Gun Metal Gray faucet installed above the finished countertop.
  • Infrared sensor: Detects hand presence and initiates automatic water flow.
  • Water outlet: Delivers approximately 1.2 GPM at the referenced operating condition.
  • Rubber gasket: Provides the sealing interface between faucet base and countertop.
  • Mounting washer: Distributes retaining force below the countertop.
  • Lock nut: Secures the faucet to the deck.
  • Threaded mounting stem: Passes through the single mounting opening.
  • Hot-water braided hose: Connects the hot-water supply to the mixing assembly.
  • Cold-water braided hose: Connects the cold-water supply to the mixing assembly.
  • Mixing valve: Combines hot and cold water before delivery to the automatic valve.
  • Solenoid valve: Electronically controls water flow.
  • Sensor cable: Connects the faucet sensor to the electronic controller.
  • Control box: Processes sensor signals and operates the solenoid valve.
  • Power cable: Connects the control system to the selected AC or battery supply.
  • Waterproof cable grommet: Protects wiring at cabinet or enclosure penetrations.
  • Angle stop valves: Provide independent hot- and cold-water isolation for maintenance.

FontanaShowers Installation and Specification Resources

FS-1095GMG Product Page Product information and available technical documentation for the Fontana Brio PrimeSense™ Gun Metal Gray touchless bathroom faucet. FontanaShowers Installation Hub Central installation information covering deck-mounted faucets, touchless controls, plumbing connections and commissioning. FS-1095GMG Single-Hole Mounting Coordination Review current model information before establishing the mounting opening, faucet centerline, countertop thickness and concealed connection locations. Touchless Faucet Installation Guidance General guidance covering deck preparation, mounting hardware, water-supply connections, electronic controls and commissioning. Product Submittal Verification Confirm current dimensions, mounting requirements, connection details and power requirements before releasing fabrication documents. Touchless Bathroom Faucet Collection Explore related Fontana automatic bathroom faucets for architectural, commercial and institutional washroom projects.

Professional Engineering and Accessibility References

Project verification: This single-hole deck-mount detail is intended for architectural, plumbing, millwork and installation coordination and does not replace approved manufacturer installation instructions or project submittals. The architect, plumbing engineer, electrical engineer, countertop fabricator, millwork contractor and licensed installer should verify the Ø35–38 mm mounting opening, Ø54 mm faucet-base footprint, countertop thickness, rubber gasket, mounting washer, lock nut, threaded mounting stem, basin relationship, braided water hoses, mixing valve, solenoid valve, control box, sensor cable, power configuration, service clearance, accessibility requirements and locally adopted plumbing and electrical codes before fabrication or installation.