New Construction Requirements

Print
Share & Bookmark, Press Enter to show all options, press Tab go to next option
Font Size: + -

Small Residential (Single Family & Duplexes) Domestic Water Services

  • Single-family & duplexes are required to have a minimum of a dual-check style backflow preventer installed. For all residential water services that provide water to three or more dwellings, you must follow the requirements in accordance with commercial applications.
  • Backflow preventer must be installed directly to the meter. There must not be any plumbing between meter and backflow assembly, such as a ‘T’ or a gauge.
  • Backflow preventer must be lead-free.
  • Backflow preventer must have ‘ASSE 1024’ indicated by the manufacturer on the assembly ID plate, and installed such that it is clearly visible.
  • You may choose to install a testable backflow prevention assembly, but it must be approved by USC-FCCCHR, and be installed according to approved specifications outlined in USC-FCCCHR.
  • Shut-off valves that are part of the backflow prevention assembly are for use during backflow testing and repair, and do not qualify to as a down-stream shut-off valve and shall not be used as such.

Commercial & Large Residential (Triplexes and Larger) Domestic Water Services

  • A testable backflow prevention assembly must be installed directly to the down-stream end of the meter.
  • There must not be any plumbing between meter and backflow assembly, such as a ‘T’ or a gauge. ‘Y’ strainers are allowed between the meter and backflow assembly.
  • Nothing is allowed to be installed at any time on the backflow preventer test ports, such as hoses, hose connections, or gauges.
  • Backflow preventer must be lead-free.
  • Backflow Preventer must be approved by USC-FCCCHR, and be installed according to approved specifications outlined in USC-FCCCHR.
  • Shut-off valves that are part of the backflow prevention assembly are for use during backflow testing and repair, and do not qualify to as a down-stream shut-off valve and shall not be used as such.
  • There must be proper clearance around backflow preventer so as to readily facilitate testing and repair. There shall be no obstructions to the assembly test ports. Minimum clearances are 12” on all sides.
  • Backflow assemblies shall not be installed more than 5’ above floor.
  • Additional backflow preventers may be installed downstream of the meter, but only one is allowed to be attached directly to the meter.
  • RP style backflow preventers: must be installed above grade and have the vent plumbed to a drain. RP style backflow preventers are required in instances that the City considers as high hazard applications. Please contact us for clarification if you are not sure if this applies to your situation.
  • Backflow preventer must be the same size as meter and must not be smaller than down-stream plumbing.
  • We do not allow bypass or detector backflow assemblies.
  • Backflow prevention assemblies installed horizontally may not be rotated on their axis away from upright. 2.5” and larger assemblies may have their shut-off valves rotated one bolt hole away from upright.
  • Before the Water/Sewer Department will sign off on the Certificate of Occupancy, the backflow preventer must be tested in accordance with the ‘Technician & Test’ requirements, and by a City of Bozeman approved technician. A list of approved technicians and the requirements can be found at bozemanbackflow.com.

Fire Suppression Sprinkler Services

  • A testable backflow prevention assembly must be installed directly to the down-stream end of the OS&Y valve.
  • There must not be any plumbing between OS&Y valve and backflow assembly, except for a pressure gauge that may be installed.
  • Nothing is allowed to be installed at any time on the backflow preventer test ports, such as hoses, hose connections, or gauges.
  • Backflow Preventer must be approved by USC-FCCCHR, and be installed according to approved specifications outlined in USC-FCCCHR.
  • Shut-off valves that are part of the backflow prevention assembly are for use during backflow testing and repair, and do not qualify to as a down-stream shut-off valve and shall not be used as such.
  • There must be proper clearance around backflow preventer so as to readily facilitate testing and repair. There shall be no obstructions to the assembly test ports. Minimum clearances are 12” on all sides.
  • Backflow assemblies shall not be installed more than 5’ above floor.
  • RP style backflow preventers: must be installed above grade and have the vent plumbed to a drain. RP style backflow preventers are required in instances that the City considers as high hazard applications. Please contact us for clarification if you are not sure if this applies to your situation.
  • Backflow preventer must be the same size as approved plumbing and must not be smaller than down-stream plumbing.
  • We do not allow bypass or detector assemblies.
  • Backflow prevention assemblies installed horizontally may not be rotated on their axis away from upright. 2.5” and larger assemblies may have their shut-off valves rotated one bolt hole away from upright.
  • Before the Water/Sewer Department will sign off on the Certificate of Occupancy, the backflow preventer must be tested in accordance with the ‘Technician & Test’ requirements, and by a City of Bozeman approved technician. A list of approved technicians and the requirements can be found at bozemanbackflow.com.