PLUMBING SYSTEMS DESIGN

Maffett Loftis Engineering works to ensure that your domestic and sanitary sewer systems work behind the scenes and won’t require constant oversight or unnecessary maintenance and headaches.



Sanitary Sewer

  • Fixture specifications
  • Fixture drainage requirements
  • Fixture quantity
  • Floor drains
  • Overall system drainage requirements
  • System capacity calculations
  • Sewer line sizing
  • Sewer utility connection size
  • Septic tank location and specification
  • Drain field location and sizing
  • Sewer main routing
  • Grease trap
  • Venting
  • Cleanouts
  • Sanitary riser diagram

Domestic Water

  • Fixture specifications
  • Fixture supply requirements
  • Fixture quantity
  • Overall system supply requirements
  • System capacity calculations
  • Hot water heaters
  • Hot water recirculation loop
  • Water line sizing - cold and hot
  • Main service entrance sizing
  • Cross-connection and backflow prevention
  • Exterior hose bibs
  • Domestic water riser diagram

Storm Drainage

  • Cumulative drain area square footages
  • Drain locations and size
  • Drain pipe sizing
  • Storm riser diagram

Coordination

  • Electric - Garbage disposals, water heaters, and hot water circulation pumps
  • Mechanical - Unit condensation drains
  • Architectural - Plumbing walls, noise levels, etc
  • Structural - Route piping around or through structure as necessary

Code Compliance

  • ASHRAE - The American Society of Heating, Refrigerating and Air-Conditioning Engineers
  • ASME - The American Society of Mechanical Engineers
  • ASPE - The American Society of Plumbing Engineers
  • ANSI - The American National Standards Institute
  • ASTM - American Society for Testing and Materials
  • SPC - SBCCI Standard Plumbing Code
  • NFPA - National Fire Protection Agency
 
  • NSF - NSF International
  • ASSE - American Society of Sanitary Engineering
  • AWWA - American Water Works Association
  • IPC - International Plumbing Code
  • IBC - International Building Code
  • SBCCI - International Building Code
  • SPC - Standard Plumbing Code
  • ADA - Americans with Disabilities Act