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Backflow Protection Program
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Backflow Protection Program

Backflow Protection Responsibility

Facility Owner/Permit Holder is responsible to ensure adequate backflow protection is in place and functioning properly. This includes:

  • having all backflow devices tested annually, if applicable;
  • ensuring device installation allows for easy access;
  • ensuring device testing and repairs are performed by certified backflow testers only; and
  • maintaining all testing and repair documentation(s) for one year from test/repair date.

Certified Backflow Tester is responsible for the following:

  • to maintain a current backflow tester’s certification;
  • perform all installations, repairs, and tests according to manufacturers’ instructions, the Uniform Plumbing Code (UPC) requirements and the parameters established by the American Backflow Preventers Association (ABPA) or the American Water Works Association (AWWA).

A certified backflow tester performing work at a health district permitted facility (only food facilities with carbonator systems and public bathing facilities), must provide a copy of their backflow credentials to the health district’s, Environmental Health (EH) Division backflow specialist for credential verification and inclusion on the health district’s in-house backflow testers’ list, strictly used by EH staff during facility inspections.

At the conclusion of a device test, the tester will tag the device according to the description outlined in the Test Tag definition, complete and forward the test results documentation to the Southern Nevada Health District, Environmental Health, North Office, P.O. Box 3902, Las Vegas, NV 89127, fax to (702) 759-1484 attention Herb Sequera, or email to Sequera@snhdmail.org.

Environmental Health (EH) Inspector is responsible for the enforcement of all backflow preventer requirements as outlined in applicable regulations to include verifying test tag information on testable backflow devices and, when possible, to identify cross-connection hazards.

When a test tag identifies a backflow tester not on the in-house backflow testers’ list, the EH inspector will notify the EH staff backflow specialist for resolution and compliance action.

Recommended actions:

  • Let the facility operator or contractor know it is Health District policy to accept only backflow test results performed by a certified backflow tester (Food Regs 5-205.15 [B]);
  • Instruct facility operator or contractor to contact Herb Sequera at (702) 759-0502 for credential verification;
  • Provide a specific time period for credential submission of five working days and advise that failure to comply may result in the tagging of the soda system(s) supported by the backflow device in question.

At no time should the permit’s status be affected due to the credential validation process, unless there are known hazards associated with the plumbing configuration, e.g. copper tubing downstream of the backflow device.

Food Facility Backflow Prevention Requirements

Carbonator requires an RPZ assembly to be installed upstream from the carbonator for backflow protection. Plumbing on the downstream side of the RPZ will not have any copper tubing, but copper fittings and brass check valves are acceptable up to the carbonator. Beyond the carbonator (downstream side of carbonator), copper tubing, copper fittings and brass check valves are not allowed.

Mop Sink requires backflow protection if there is a hose attached to the sink’s faucet. If no water nozzle is attached to the water hose an AVB is sufficient. If there is a water nozzle attached to the water hose a PVB is required. (AVB’s physical limitation does not support a shut-off valve on the water nozzle downstream from the valve nor can it support continuous water pressure for more than 12 hours in a 24 hour period.)

Drainline requires an AG, the highest level of backflow protection.

Chemical Dispenser requires an AG, the highest level of backflow protection. Many times it is difficult to observe the AG in a chemical dispensing system because it’s normally contained behind a cover plate to prevent tampering. Within the past several years, industry started using cover plates with side access openings for viewing ability.

Note: Throughout the food facility there are numerous pieces of equipment that have built-in backflow preventers; inspectors will only note issues associated with the preventer if obvious backflow issues are observed.

Public Bathing Facility Backflow Prevention Requirements

Equipment Room requires RPZ or PVB protection; preferably at the point where the potable water line enters the room and upstream from any circulating system (pump, filter, and chlorinator) and the automatic water fill system. If no RPZ or PVB is provided, an AG must be present if the automatic fill line is below the water surface.

Overfall Fillspout requires an AG not less than 6 inches between the flood level of the pool and the lowest point of the fillspout.

Overfall Supply to a Surge Tank or Receptor requires AG protection with a gap distance of two times the diameter of the discharge pipe, but never less than 1 inch.

Waste Disposal of Filtered Water requires AG protection with a gap distance two times the discharge pipe diameter, but never less than 1 inch before entering the sanitary sewer system.

Public Accommodation Backflow Prevention Requirement

Main Potable (Domestic) Water Line if backflow protection is installed on the main potable water line, the backflow protection device is placed downstream from the water purveyor’s water meter. The RPZ is the required backflow protection device.

On-Site Laundry Facility requires an AG between all drain lines and receiving vessels (direct connections between drain lines and the sanitary sewer system are not permitted).

Public Accommodation Facilities Supporting a Self-Contained Recreational Vehicle (SCRV) for Dry Camping Backflow Prevention Requirement

Water Supply Station Faucet requires a PVB attached to the faucet to allow for the attachment of a water hose and/or hose reel with water nozzle.

Mobile Home Park (MHP) Backflow Preventer Requirements

Main Potable (Domestic) Water Line if backflow protection is installed on the main potable water line, the backflow protection device is placed downstream from the water purveyor’s water meter. The RPZ is the required backflow protection device.

On-Site Laundry Facility requires an AG between all drain lines and receiving vessels (direct connections between drain lines and the sanitary sewer system are not permitted).

Trailer Site Water Riser requires an AVB (hose bib type), at a minimum, provided the valve is not subjected to more than 12 hours of continuous water pressure. If the valve is under continuous (24 hours) water pressure, as outlined in the UPC, a PVB is then required.

Trailer Sewer Line requires the line to have a minimum pipe diameter of 3 inches, sloped 1/4 inch per foot at any portion of the drain line, draining into a trailer site sewer riser with a minimum diameter of 4 inches. The trailer site sewer riser provides the AG between the trailer sewer line and the sanitary sewer.

 

 

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