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Fontana Brio PrimeSense™ Line FS-1095GMG Gun Metal Gray Touchless Bathroom Faucet: Cross Section Installation Detail

This cross-section 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 cross-section drawing communicates the relationship between the faucet body, finished countertop, countertop substrate, mounting hole, mounting hardware, hot- and cold-water hoses, mixing valve, solenoid valve, infrared sensor cable, electronic control box, power cable, waterproof cable penetration and required under-counter service clearance.

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

The Fontana FS-1095GMG is a deck-mounted automatic bathroom faucet with a Gun Metal Gray finish and infrared touchless activation. The faucet is installed through a single countertop opening and secured below the deck with a mounting washer and lock nut. Concealed below the countertop are the braided hot- and cold-water hoses, factory pre-set mixing valve, solenoid valve, electronic control box, sensor cable and AC or battery power components required for automatic operation.

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

Required Cross Section Installation Drawing Package

The cross-section drawing should extend from the exposed faucet above the countertop through the complete mounting assembly and concealed under-counter equipment zone. The finished countertop, substrate, mounting hole, threaded mounting stem, retaining hardware, sensor cable, braided supply hoses, mixing valve, solenoid valve, control box, water-supply connections, power connection and maintenance-clearance area should be clearly identified. Dimensions should reference the finished countertop plane and verified manufacturer requirements.

Complete Cross Section Installation Detail

Shows the complete FS-1095GMG installation from the visible faucet body above the countertop through the threaded mounting assembly and all concealed components below. The section identifies the hot- and cold-water connections, mixing valve, solenoid valve, controller, sensor cable, power cable and required maintenance-access zone.

Touchless Faucet Body

Identifies the exposed Gun Metal Gray faucet body located above the finished countertop. The faucet should be installed vertically and securely so the spout projects correctly over the basin and the infrared sensor remains positioned within the intended user detection zone.

Infrared Sensor Location

Shows the infrared sensing element integrated within the faucet spout. The sensor activates the faucet when hands enter the detection zone and communicates with the electronic control box through the concealed sensor cable.

Water Outlet

Identifies the faucet discharge location above the basin. The drawing should coordinate the outlet with the basin geometry so the 1.2 GPM water stream enters the usable bowl area without excessive splash.

Finished Countertop

Shows the upper finished deck surface supporting the faucet. The countertop should be flat, level and sufficiently rigid to support the faucet body without rocking, deformation or excessive movement during normal use.

Countertop Substrate

Identifies the structural stone, solid-surface material or approved countertop substrate through which the faucet mounting stem passes. The combined countertop thickness should remain within the permitted mounting range.

Single-Hole Mounting Opening

Shows the Ø35–38 mm [1-3/8"–1-1/2"] mounting opening through the countertop. The hole should be coordinated with the basin, backsplash, countertop reinforcement and under-counter plumbing before fabrication.

Mounting Washer

Identifies the washer positioned against the underside of the countertop. The washer distributes the clamping load from the lock nut and helps stabilize the faucet against movement during operation.

Lock Nut

Shows the retaining nut installed beneath the mounting washer. The lock nut should be hand-tightened securely without excessive torque that could damage the mounting stem, countertop or faucet body.

Threaded Mounting Stem

Documents the threaded faucet shank extending through the countertop and supporting the underside mounting hardware. The stem should remain centered in the opening and perpendicular to the finished deck.

Sensor Cable

Shows the low-voltage sensor cable passing from the faucet assembly to the electronic control box. Route the cable without sharp bends, kinks, tension or interference with the drain, cabinet hardware or water-supply hoses.

Hot-Water Hose

Identifies the stainless-steel braided hot-water hose routed from the G1/2" hot-water angle stop to the factory pre-set mixing valve. The hose should remain accessible for inspection and replacement.

Cold-Water Hose

Shows the stainless-steel braided cold-water connection between the G1/2" cold-water supply and mixing assembly. Maintain a smooth hose routing path without compression, twisting or excessive loops.

Factory Pre-Set Mixing Valve

Identifies the under-counter mixing valve combining the hot- and cold-water supplies before water reaches the electronically controlled valve assembly. The valve should remain accessible for inspection and future maintenance.

Solenoid Valve

Shows the electronically operated water-control valve connected to the control box. The solenoid opens when the infrared sensor detects a user and closes automatically when the user leaves the detection field.

Electronic Control Box

Identifies the control enclosure mounted in a dry under-counter location. The control box receives the sensor signal and controls the solenoid valve while connecting to the selected AC or battery power source.

Control Box Mounting Location

The control box should be mounted vertically where practical and positioned away from direct water exposure, supply joints, drainage connections and areas subject to standing water.

Power Cable

Shows the electrical connection serving the faucet controller. The system may use the approved AC power adapter or battery configuration identified for the project.

Waterproof Cable Grommet

Identifies the sealed cable penetration through the cabinet or supporting construction. The penetration should be protected against moisture entry and should not create a sharp edge capable of damaging the cable jacket.

Hot-Water Angle Stop

Shows the dedicated hot-water shutoff below the lavatory. The angle stop should remain accessible for isolation, commissioning and maintenance of the touchless faucet system.

Cold-Water Angle Stop

Identifies the accessible cold-water isolation valve serving the mixing assembly. The shutoff should be positioned so normal servicing does not require removal of the basin or permanent cabinet components.

Basin Relationship

Shows the lavatory basin in relation to the faucet outlet and under-counter equipment. The faucet should be positioned so the water stream lands within the basin while concealed components remain clear of the bowl and drain.

Spout-to-Basin Clearance

The installation drawing identifies a minimum 50 mm [2"] clearance from the spout to the basin edge. Final placement should also consider basin geometry, splash performance and sensor operation.

Under-Counter Service Clearance

Provide approximately 300 mm [12"] minimum recommended service clearance beneath the countertop so technicians can access the control box, valves, hoses, connectors and mounting hardware.

Engineering note: The cross-section drawing should be coordinated with the actual countertop, basin, cabinet, drain and water-supply conditions before fabrication. Confirm the Ø35–38 mm mounting opening, maximum 35 mm countertop thickness, G1/2" supply connections, control-box position, sensor-cable reach, power configuration and under-counter service clearance against the approved FontanaShowers product documentation and project submittal.

Countertop and Faucet Mounting Coordination

Mounting-Hole Diameter

Provide a Ø35–38 mm [1-3/8"–1-1/2"] opening through the countertop. Verify the hole centerline against the basin and confirm clearance below the deck before drilling.

Countertop Thickness

The drawing identifies a maximum countertop thickness of approximately 35 mm [1-3/8"]. Review stone buildup, reinforcement and substrate layers before releasing the countertop for fabrication.

Flat Mounting Surface

The faucet base should bear against a flat and level finished surface. Uneven stone, grout joints or excessively textured surfaces may prevent proper gasket compression and stable mounting.

Gasket Seating

Confirm the faucet base gasket is seated evenly around the mounting opening to help reduce water migration through the countertop penetration.

Washer Alignment

Install the mounting washer squarely against the underside of the countertop so the clamping force is distributed evenly around the faucet stem.

Lock-Nut Tightening

Tighten the lock nut sufficiently to prevent faucet movement while avoiding excessive installation force that could damage the deck or mounting components.

Hydraulic Cross Section Coordination

Hot-Water Supply

Connect the hot-water inlet to the designated G1/2" supply connection and provide an accessible angle stop for isolation and maintenance.

Cold-Water Supply

Connect the cold-water inlet to the designated G1/2" connection using the approved braided supply hose and accessible isolation valve.

Mixing Valve

The hot and cold supplies feed the pre-set mixing valve before entering the automatic water-control system. Keep the mixing assembly accessible for inspection and replacement.

Solenoid Valve Orientation

Install the electronically controlled valve in the correct direction of water flow and maintain adequate space around the connections for testing, removal and servicing.

Hose Routing

Route all flexible water hoses in smooth curves. Avoid sharp bends, kinks, twisting, excessive tension or contact with sharp cabinet hardware.

Leak Inspection

After the water supply is pressurized, inspect the angle stops, braided hoses, mixing valve, solenoid valve and faucet connections before commissioning the electronic system.

Electrical and Sensor Coordination

Infrared Sensor Cable

Route the sensor cable directly from the faucet to the control box without excessive loops, sharp bends or compression between the countertop and basin.

Solenoid-Control Connection

Connect the automatic valve to the designated controller output and keep the electrical connector dry and accessible for diagnostic testing.

AC Power Arrangement

Where AC operation is used, locate the approved adapter and connection in a dry, serviceable area consistent with project electrical requirements.

Battery Operation

Where battery operation is selected, position the battery enclosure where batteries can be replaced without removing plumbing fixtures or permanent millwork.

Waterproof Penetration

Seal cable penetrations through cabinet panels or supporting construction using an appropriate grommet or approved waterproof sealing method.

Controller Protection

Mount the electronic control box away from direct spray, leaking supply joints, drain connections and the lowest portion of the cabinet where standing water may accumulate.

Cross Section Installation Notes

  • Countertop preparation: The finished mounting surface should be flat, level and structurally capable of supporting the faucet.
  • Mounting-hole size: Provide the recommended Ø35–38 mm [1-3/8"–1-1/2"] opening shown in the installation detail.
  • Countertop thickness: The drawing indicates a maximum recommended thickness of approximately 35 mm [1-3/8"].
  • Gasket installation: Seat the rubber gasket correctly around the faucet base before tightening the mounting assembly.
  • Lock-nut installation: Hand-tighten the retaining nut securely. Do not overtighten.
  • Hose and cable routing: Keep braided hoses and electrical cables free of sharp bends, kinks, twisting and compression points.
  • Isolation valves: Provide accessible hot- and cold-water shutoff valves for maintenance.
  • Waterproofing: Seal required countertop and cabinet penetrations against moisture entry.
  • Leak testing: Verify all hydraulic connections for leakage after installation and before final commissioning.
  • Service clearance: Maintain approximately 300 mm [12"] minimum access beneath the countertop for the control box, solenoid valve, hoses and electrical connectors.

Cross Section Component Identification

  • Touchless faucet body: Visible Gun Metal Gray fixture installed above the countertop.
  • Infrared sensor: Detects hand movement and initiates the automatic water-flow cycle.
  • Water outlet: Discharges the specified water flow into the lavatory basin.
  • Finished countertop: Exposed mounting surface supporting the faucet.
  • Countertop substrate: Structural stone, solid-surface material or equivalent supporting layer.
  • Mounting opening: Ø35–38 mm opening through the countertop.
  • Mounting washer: Distributes clamping pressure below the countertop.
  • Lock nut: Secures the faucet to the underside of the countertop.
  • Threaded mounting stem: Connects the faucet body to the underside mounting assembly.
  • Sensor cable: Connects the infrared sensor assembly to the electronic controller.
  • Hot-water hose: Stainless-steel braided connection from the hot supply to the mixing valve.
  • Cold-water hose: Stainless-steel braided connection from the cold supply to the mixing valve.
  • Mixing valve: Combines hot and cold water to establish the faucet supply temperature.
  • Solenoid valve: Electronically opens and closes the water supply.
  • Control box: Processes sensor input and controls automatic faucet operation.
  • Power cable: Connects the controller to the approved AC or battery power source.
  • Waterproof cable grommet: Protects the cable 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, Gun Metal Gray finish details and available technical documentation for the Fontana Brio PrimeSense™ touchless bathroom faucet. FontanaShowers Installation Hub Central installation information covering touchless faucets, countertop mounting, water connections, electrical coordination and commissioning. FS-1095GMG Mounting Coordination Review current model information before establishing countertop openings, mounting centerlines, water-supply locations and equipment clearances. Touchless Faucet Installation Guidance General guidance covering faucet mounting, water-supply connections, controller installation, sensor wiring and final commissioning. Product Submittal Verification Confirm current product dimensions, mounting requirements, hydraulic configuration and power requirements before releasing fabrication or construction documents. Touchless Bathroom Faucet Collection Explore related Fontana automatic bathroom faucets for commercial, institutional and architectural washroom applications.

Professional Engineering and Accessibility References

Project verification: Cross-section installation details are coordination tools and do not replace approved manufacturer instructions or project submittals. The architect, plumbing engineer, electrical engineer, countertop fabricator, millwork contractor and licensed installer should verify the countertop opening, countertop thickness, faucet centerline, basin relationship, mounting hardware, hot- and cold-water connections, mixing valve, solenoid valve, controller, sensor wiring, power configuration, service clearance, accessibility requirements and locally adopted plumbing and electrical codes before fabrication or installation.