Nevada Administrative Code
Chapter 445A - Water Controls
PUBLIC WATER SYSTEMS
Design, Construction, Operation and Maintenance
Section 445A.6725 - Cross-connections and backflow: Use of vacuum breakers
Universal Citation: NV Admin Code 445A.6725
Current through September 16, 2024
1. An atmospheric vacuum breaker or pressure vacuum breaker may be used only for protection against pollution or contamination under conditions of backsiphonage.
2. If an atmospheric vacuum breaker is used:
(a) The vacuum breaker
must be installed not less than 6 vertical inches above the highest point of
the downstream piping.
(b) Any
associated shutoff valve must be installed upstream from the vacuum
breaker.
(c) The vacuum breaker
must not be subjected to operating pressure for more than 12 hours in any
24-hour period.
(d) Flow from the
protected fixture must be to the atmosphere.
3. If a pressure vacuum breaker is used, the vacuum breaker:
(a) Must be installed:
(1) Upstream from the terminal shutoff valve;
and
(2) Not less than 12 vertical
inches above the highest point of the downstream outlet, valve or
piping.
(b) Must not be
installed at a location where backpressure will occur.
Added to NAC by Bd. of Health, eff. 2-20-97
NRS 445A.860
Disclaimer: These regulations may not be the most recent version. Nevada may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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