A relief valve is provided for draining water from the main supply hose and a backflow preventor valve is provided for preventing back-siphonage into the water supply.Noelke, Michael A.
the model for three control scenarios: 1) a passive system, 2) a passive system with a tide gate (backflow preventer), and 3) a tide gate and three actuators (a pump, a valve, and an inflatable dam) controlled through MPC. ... JM Sadler,JL Goodall,M Behl,... - 《Journal of Hyd...
Backflow valve test report for the city. Mid-summer zone by zone inspection to detect problems if any caused by summer activity. Sprinkler winterization by shutting water at the street and blowing all pipes with compressed air to prevent expensive damage to sprinkler heads and irrigation valves fro...
First, turn off the water supply at your main shutoff valve. Sometimes, the shutoff is in the basement, a crawl space, or a valve box close to the water meter or main water line. For systems with backflow preventers, you need to shut them off, too. In most cases, two valves feed...
4. Indexing valve skipping over watering zones: Three possible problems with solutions include: If the valve is not installed at the highest point of the system, there may be backflow entering the valve after shut down. If backflow enters the valve, it will cause the disc to skip as it ...
Each valve has a filter on it and a air brake(can't remember the correct term) on each line. Like | 1 Save Wil Haines 4 years ago Sounds like we need the pro's on this one. I agree that the freezing issue is likely over-rated, but having had a backflow preventer burst and send...
Valve box large enough to house the sprinkler manifold Sprinkler manifold with one valve per zone in your system (you can buy a prefabricated one or build your own) Backflow preventer (if required) Level Pipe wrench Pipe cutter or hacksaw ...
Sprinkler valve manifold combines several valves in a single unit. Orbit In areas where pipes aren’t likely to freeze, anti-siphon valves are installed a foot above the circuit’s highest sprinkler and include a backflow preventer that prevents water in the pipes from contaminating the home’s...
A fuel dispensing nozzle includes a body having a spout slidably supported thereon with a valve, which is in the body and controls flow from the body to the spout, opening only when the spout is disposed in a tank to be filled. For fuel to flow through the spout, another valve, which...
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