FloSafe – Drinking Water System Protection & Cross-Connection Control Consulting

Specialized consulting for High-Rise Buildings, Mixed-Use Towers, Municipal Water Systems, NTNC Public Water Systems, and Complex Facilities

Cross-Connection Control • Design Review • Regulatory Compliance • Risk Assessment

916-798-2810

Request High-Rise Water System Review View High-Rise Design Review Services

Prepared for Building Owners, Property Managers, Engineers, Architects, Water Suppliers, and Design Teams

20-STORY HIGH-RISE BUILDING - POTABLE WATER SYSTEM

Vertical distribution, dual pressure zones, rooftop hazards, and mixed-use tenant risks

Interactive engineering reference — hover over equipment to view cross-connection control requirements and high-rise contamination pathway risks.

EQUIPMENT INFO

Hover over equipment
Select an item to view:
• CCC requirements
• Backflow prevention
• Pressure-zone risks
• Hazard classifications
20-STORY HIGH-RISE POTABLE WATER SYSTEM Mixed-Use Tower: Residential + Commercial + Parking BASEMENT / GROUND LEVEL Water Service Entry Meter RPZ Booster Pump System Pump 1 Pump 2 Pump 3 VFD Mechanical Equipment Room VERTICAL DISTRIBUTION RISERS ZONE 1 Floors 1-10 Street Pressure 50-70 PSI ZONE 2 Floors 11-20 Boosted Pressure PRV to 60-70 PSI Cold Water Risers (2) Hot Water Supply + Return Fire Standpipe (Separate System) TYPICAL FLOOR DISTRIBUTION RESIDENTIAL Units (Floors 3-20) COMMERCIAL Spaces (Floors 1-2) COMMON AREAS • Janitor Closets • Restrooms • Utility Rooms PARKING GARAGE (Basement Levels) ROOF LEVEL (20th Floor) HVAC Cooling Equipment Air Gap Required Chemical Treatment Water Storage Tank (Optional) Air Gap Required Sanitary Protection Roof Garden Irrigation PVB/AVB Required Fertilizer Risk Amenity Areas Pool, Kitchen, BBQ Air Gaps Required Fire System Outlet Standpipe Test Point HVAC Condensate Air Gap to Drain Other Mechanical Equipment Per Application MAIN ZONES Z1 Z2 TO FLOORS CRITICAL LEGEND Water Flow Direction Vertical Riser (Upward) Equipment Pressure Zone Room/Area Critical Water Flow Critical Area Higher-Hazard Area ABBREVIATIONS RPZ = Reduced Pressure Zone PRV = Pressure Reducing Valve VFD = Variable Frequency Drive VB = Vacuum Breaker CPC = California Plumbing Code PVB = Pressure Vacuum Breaker AVB = Atmospheric Vacuum Breaker DHW = Domestic Hot Water PSI = Pounds per Square Inch NFPA = National Fire Protection Assn HIGH-RISE CCC REQUIREMENTS – ENHANCED PROTECTION PRESSURE MANAGEMENT: Maximum 80 PSI at fixtures (CPC) • PRV at each zone entry • Dual zones for 20-story building BACKFLOW PREVENTION: Master RPZ at service entry (PWS protection) • Critical rooftop/mechanical hazards require air gaps or RPZ • Tenant spaces require individual assessment CCC SPECIALIST REQUIRED: For mixed-use high-rise systems on PWS or municipally supplied systems TENANT IMPROVEMENTS: Ongoing assessment as uses change over building life BUILDING PROFILE 20-STORY BUILDING BREAKDOWN: • Basement: Parking, mechanical, storage • Floor 1: Commercial lobby, retail • Floor 2: Commercial office/retail • Floors 3-20: Residential (18 floors) • Roof: Mechanical, amenities PRESSURE ZONES: • Zone 1: Floors 1-10 (street pressure) • Zone 2: Floors 11-20 (boosted) OCCUPANCY: ~144-216 residential units (8-12 per floor) CRITICAL CCC CONSIDERATIONS FOR HIGH-RISE BUILDINGS • Vertical pressure zones require careful PRV sizing and placement to maintain 80 PSI maximum at fixtures • Mixed-use occupancies (residential + commercial) create diverse cross-connection hazards requiring ongoing assessment • Tenant improvements can change water system use patterns - commercial spaces particularly susceptible to hazard changes over time Note: Best viewed on desktop/laptop for full interactivity

Need a high-rise water system protection review?

FloSafe supports design review, pressure-zone coordination, tenant improvement evaluation, and cross-connection control strategy for complex vertical buildings.

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