2 Vacuum breaker
or sequencing valve--at each receiver directs vacuum to that receiver.
. 36% of units surveyed did not have all potable water hose temporary connections equipped with a vacuum breaker
(back flow preventer NSN: 4820-00-164-3377).
Also check that the boiler is fitted with a vacuum breaker
to prevent it falling below atmospheric pressure as it cools.
Kits vary slightly from brand to brand; choose one that includes a timer, a filter, a pressure regulator, and an antisiphon device (also called a backflow preventer or vacuum breaker
), which keeps irrigation water from being drawn back into the public water system and is required by many localities.
Experienced builders will use a Hartford loop with a vacuum breaker
on all vanishing-edge projects.
The blower's vacuum breaker
valve balances conveying rates on the vacuum and pressure sides of the system.
A vacuum breaker
keeps water from flowing back into the system.
The comprehensive water gauge control valve is attached to the hose bib downstream from any vacuum breaker
, so once the line is pressurized, the condition of the vacuum breaker
Check the seal on the dump can on the cyclone, the filter housing lid seal at the pump, the vacuum breaker
valve, (verify it has air 85 to 100 psi), and all piping connections.
Most frost-proof faucets have a built-in vacuum breaker
located on top of the faucet (Photo 4).
To prevent backflow, leave 2 inches between emitters and foliage or soil, or place an atmospheric vacuum breaker
on the line 6 inches above the highest emitter.