Home > Water Pressure and Flow Requirements Diagram

Fontana Commercial Sensor Faucets™ | Architectural and Engineering Resource

Fontana FS-354AQ-DP Antique Commercial Automatic Sensor Faucet: Water Pressure & Flow Requirements Diagram

This water-pressure and flow-requirements resource supports architects, plumbing engineers, specifiers, contractors, installers and facility teams coordinating the Fontana FS-354AQ-DP commercial automatic sensor faucet. The diagram establishes the building-supply pressure, shut-off valve, inline filter / strainer, solenoid valve, faucet inlet, pressure-loss measurement points, required flow performance, supply connection and commissioning checks needed to verify reliable faucet operation.

FS-354AQ-DP Pressure-Regulated Water Supply System

The FS-354AQ-DP water-supply arrangement routes incoming building water through an isolation valve, inline 100-mesh filter / strainer and solenoid valve before reaching the faucet inlet. Pressure measurements at successive points in the system allow installers to identify pressure loss across individual components and confirm that adequate dynamic pressure remains available at the fixture for the specified flow performance.

  • Model: FS-354AQ-DP
  • Fixture type: Commercial automatic sensor faucet
  • Installation: Deck mounted
  • Supply connection: G1/2 in (DN15)
  • Minimum operating pressure: 0.05 MPa (7 psi)
  • Recommended operating range: 0.1–0.4 MPa (15–58 psi)
  • Maximum allowable pressure shown: 0.05–0.6 MPa (7–87 psi)
  • Rated water flow: 1.2 GPM (4.54 L/min) at 60 PSI
  • Filter / strainer: 100 mesh
  • Pressure Point 1: Building supply inlet
  • Pressure Point 2: After shut-off / isolation valve
  • Pressure Point 3: After inline filter / strainer
  • Pressure Point 4: After solenoid valve
  • Pressure Point 5: At faucet inlet / fixture
  • Minimum service clearance: 250 mm (9.84 in)
Product Page Installation Guide

Required Water Pressure & Flow Drawing Package

The pressure and flow drawing should identify the complete hydraulic path from the building water supply to the faucet inlet and establish measurement points before and after major system components. Pressure should be checked at the building inlet, downstream of the isolation valve, downstream of the filter / strainer, downstream of the solenoid valve and at the fixture inlet. These measurements allow pressure losses to be evaluated during commissioning while confirming that the faucet receives adequate operating pressure and flow.

Water Pressure & Flow Requirements Diagram

Shows the complete supply path serving the FS-354AQ-DP from the building inlet through the shut-off valve, 100-mesh strainer and solenoid valve to the faucet inlet. Five pressure-measurement locations are identified for commissioning and system-performance verification.

Point 1 – Building Supply Inlet

Point 1 establishes the upstream static-pressure reference before the faucet system components. The drawing identifies the target value as the pressure supplied by the building plumbing system and uses this reading as the baseline for subsequent pressure-loss evaluation.

Point 2 – After Isolation Valve

Point 2 measures dynamic pressure immediately downstream of the shut-off / isolation valve. The diagram identifies a typical target of at least 0.10 MPa (15 psi) and uses the difference between Points 1 and 2 to identify pressure loss through the shut-off valve.

Point 3 – After Filter / Strainer

Point 3 measures dynamic pressure downstream of the 100-mesh inline filter / strainer. The indicated target is at least 0.09 MPa (13 psi). Pressure loss between Points 2 and 3 can provide an indication of filter condition during commissioning or maintenance.

Point 4 – After Solenoid Valve

Point 4 measures dynamic pressure downstream of the solenoid valve. The drawing identifies a target of at least 0.08 MPa (12 psi). This measurement helps verify that the energized solenoid valve is fully open and not creating excessive pressure loss.

Point 5 – Faucet Inlet / Fixture

Point 5 measures the final dynamic pressure available at the faucet inlet. The drawing identifies a target of at least 0.07 MPa (10 psi) at this location to verify final pressure availability and faucet performance.

Recommended Operating Pressure

The supplied diagram identifies a minimum operating pressure of 0.05 MPa (7 psi) and a recommended operating range of 0.1–0.4 MPa (15–58 psi). The indicated maximum operating-pressure information should be observed during system design and commissioning.

Rated Water Flow

The faucet flow requirement is identified as 1.2 GPM (4.54 L/min) at 60 PSI. Actual delivered flow can vary with available supply pressure and pressure losses through valves, filters, hoses, fittings and other components in the water path.

Service & Commissioning Access

The installation should provide approximately 250 mm (9.84 in) of minimum frontal access to the plumbing components so gauges, isolation devices, filter, solenoid valve and associated connections can be inspected, tested and serviced.

Engineering note: Pressure should be measured under the appropriate static or dynamic condition identified for each test point. Compare readings across adjacent components to identify abnormal pressure loss through the isolation valve, filter / strainer, solenoid valve, flexible hose or fittings. Flow performance should be confirmed only after the supply lines have been flushed and the filtration components are clean.

Pressure & Flow Coordination Considerations

Supply Pressure

Verify available building water pressure before commissioning the faucet. The supplied diagram identifies 0.05 MPa (7 psi) as the minimum operating pressure.

Recommended Pressure Range

The drawing identifies a recommended operating-pressure range of 0.1–0.4 MPa (15–58 psi) for the faucet supply system.

Filter Pressure Loss

Compare pressure immediately before and after the 100-mesh filter / strainer. An increased pressure drop can indicate that the screen requires inspection or cleaning.

Solenoid Pressure Loss

Measure downstream pressure while the solenoid is energized. Excessive pressure reduction across the valve may indicate restricted flow or incomplete valve opening.

Fixture Pressure

Verify the final dynamic pressure at the faucet inlet after accounting for upstream valves, filtration, fittings and hose losses. The supplied target at this location is at least 0.07 MPa (10 psi).

Flow Verification

Confirm actual water flow after supply pressure and component condition have been verified. The supplied rating is 1.2 GPM (4.54 L/min) at 60 PSI.

Pressure-Loss Measurement Points

1. Building Supply Inlet Static-pressure reference measured upstream of the faucet-system components. The target is the pressure available from the building supply. 2. After Shut-Off Valve Dynamic-pressure measurement with a typical target of ≥0.10 MPa (15 psi), used to evaluate pressure drop through the isolation valve. 3. After Filter / Strainer Dynamic-pressure measurement with a typical target of ≥0.09 MPa (13 psi). Pressure loss from Point 2 can indicate filter condition. 4. After Solenoid Valve Dynamic-pressure measurement with a typical target of ≥0.08 MPa (12 psi), used to confirm adequate pressure downstream of the energized solenoid. 5. Faucet Inlet / Fixture Final dynamic-pressure measurement with a typical target of ≥0.07 MPa (10 psi) at the fixture inlet. Pressure & Flow Commissioning Use sequential pressure measurements together with flow-rate verification to identify supply restrictions, component losses and final faucet operating conditions.

Commissioning & Technical Requirements

  • Verify Incoming Pressure Measure the building supply pressure before evaluating downstream components and confirm that sufficient pressure is available for faucet operation.
  • Flush Supply Lines Flush the building water supply thoroughly before commissioning to remove debris that could restrict the filter, solenoid valve or faucet waterways.
  • Clean Filter / Strainer Inspect the 100-mesh filter / strainer and clean the screen where required before final pressure and flow measurements are recorded.
  • Check Pressure Before & After Filter Compare Points 2 and 3 to identify pressure drop across the filter / strainer and evaluate whether the filter condition is affecting system performance.
  • Verify Pressure at Fixture Measure dynamic pressure at the faucet inlet after the upstream components have been checked and confirm the final pressure available to the fixture.
  • Confirm Flow Rate The supplied drawing identifies a faucet flow rate of 1.2 GPM (4.54 L/min) at 60 PSI. Actual flow depends on supply pressure and system losses.
  • Inspect for Leaks Check the building inlet, shut-off valve, filter, solenoid valve, flexible hose and faucet-side connections for leakage during commissioning.
  • Confirm Touchless Operation After pressure and flow have been verified, activate the sensor faucet and confirm consistent automatic water delivery and shutoff.

Project verification: The water-pressure and flow-requirements diagram is a coordination and commissioning resource and should not be scaled. Before placing the faucet into service, verify the G1/2 in (DN15) supply connection, 0.05 MPa (7 psi) minimum operating pressure, 0.1–0.4 MPa (15–58 psi) recommended operating range, maximum-pressure information shown on the approved drawing, 1.2 GPM (4.54 L/min) rated flow at 60 PSI, pressure at all five measurement points, isolation-valve operation, 100-mesh filter condition, solenoid-valve operation, 250 mm minimum frontal service clearance and all connections for leakage. Actual flow should be evaluated against available supply pressure and pressure losses through the installed system.