ASVF Anti-siphon Valve
Operation Manual
DAS-075 I ASVF 3/4”
DAS-100 I ASVF 1”
3
ASVF Anti-siphon Valve Operation Manual
For use with all standard sprinkler controllers with 24 volt AC output. The DAS I ASVF valves are diaphragm antisiphon valves with flow control and atmospheric vacuum breaker.
NOTE: These Rain Bird valves are designed for use with static water pressures of a MAXIMUM of 150 PSI. For higher
Anti-Siphon Valves for Backflow Prevention
The DAS/ASVF models meet or exceed most building code requirements for connecting a sprinkler system to a city water supply.
These valves prevent the possibility of back siphoning of water from sprinkler lines into the drinking water.
The anti-siphon valves must be installed at least 6 inches above the highest sprinkler or elevated piping in the circuit to meet most codes, (See Diagram
1.)(Consult local building code.)
CAUTION: Do not use this anti-siphon valve as a main line backflow device, nor as a master valve. It is not designed nor approved to be under constant water pressure on both sides of valve. This valve must be operated continuously for more than twelve (12) hours. Do not install any other valves down stream. If installed incorrectly with constant pressure on both sides of valve, it is possible the valve will fail or burst.
pressures, a pressure regulator should be installed. These valves are for outdoor watering use only.
For dirty water systems-using wells, lakes, ditches, etc. for yourwater supply, be sure to install a 100 mesh (or finer) wire filter or screen filter before the electric valves. For use in cold water less than 110°F (43.3°C), applications only.
1
Outlet to
Sprinklers
Wires to
Controller
Test this connection for water tightness before attaching outlet pipe.
The valve
±6"
must be mounted at least 6” above the highest sprinkler on the circuit.
±6"
Inlet
How to Select the Right Valve Size
The valve size (3/4” or 1”) is determined by the water flow (measured in gallons per minute, or GPM) of the main line or the sprinkler circuit.
3/4” VALVES: 13 GPM or less. 1” VALVES: 14 GPM or more.
Assembly of Sprinkler Valves to Pipe
A sprinkler system is made up of one or more groups of sprinklers (called circuits) each operated by its own control valve. Study the illustrations and follow the instructions for proper assembly.
1. Before connecting and testing the assembly, thoroughly flush the main line to prevent debris from damaging the valves.
2. On the inlet side of the control valve, use galvanized steel pipe or thick-walled, Schedule 40 PVC, white plastic pipe, as this pipe is under constant pressure. On the outlet side of the control valve, thin-walled PVC pipe or flexible polyethylene pipe may used.
1“ valves and pipes allow longer runs and more sprinkler heads per circuit, as well as potentially reducing the total number of valves required.
3. To assure a watertight connection, use only one to two turns of Teflon tape on the threaded valve-topipe connections. DO NOT USE PIPE SOLVENT OR PIPE DOPE. THIS MAY DAMAGE THE VALVE. DO NOT OVERTIGHTEN. Screw adapters into place finger tight. Tighten adapters one to two additional turns.
4. Install a master shutoff valve before all electric valves, so that the water can be conveniently turned off if a valve needs servicing.
5. When grouping valves, allow sufficient spacing between valves to unscrew the valve from the pipe (about 6 inches).
6. Do not connect the outlet side (piping to sprinkler heads) without first testing for leaks. If the outlet side is connected and there is a leak, the pipe would have to be cut in order to tighten the connection.
Valve Operation
Your Rain Bird valve offers two features with which you should become familiar.
FLOW CONTROL: This feature allows you to control the amount of water going to your sprinklers. To allow more water through the valve, turn the black knob counterclockwise UNTIL RESISTANCE IS FELT. This is fully open position.
To reduce the amount of water, turn the black knob clockwise. If you keep turning, you can turn the valve all the way off. In this case, the valve will not open.
MANUAL CONTROL: This allows you to override your automatic controller and turn your sprinklers on AT THE VALVE . The valve can be turned on manually with the external bleed screw or with the internal solenoid bleed. The solenoid (block cylinder with wires) is wired to your
4
controller and turns the valve off and on electronically.
To operate manually with the internal bleed, turn the solenoid 1/4 turn counter-clockwise; this opens the valve.
The sprinklers will continue to run until you turn the solenoid back in the clockwise direction (snugly), but do not over-tighten.
To turn on (open) the valve with the external bleed, turn the external bleed screw counter-clockwise, 1/2 turn. Water will exit the external bleed while the valve is on. To turn off the valve, turn the external bleed screw clockwise until snug. Do not over-tighten.
TO OPERATE YOUR VALVE ELECTRONICALLY, BE SURE THE SOLENOID IS TURNED ALL THE WAY TO THE CLOCKWISE POSITION.
Connection, Testing and Wiring These Valves
1. Shut off the water main or the master shutoff valve
6. Each valve has two wires. Either one may be used as and connect the valve or valve assembly to the main supply pipe. Be sure the water lines are flushed and clean.
2. Test the pipe and valve connections for water tightness as follows:
A. Turn the flow control clockwise (down) to off
before turning on the water supply.
B. Tum on the water and check for leaks.
3. Now complete the hookup by connecting the outlet pipes from the valves to the sprinklers.
4. Set flow control adjustment before making wiring connections.
5. WIRE CONNECTIONS (Diagram 2). Use 18 gauge wire to connect the wires to the controller. Wiring that is to be buried alongside the pipes should be APPROVED for UNDERGROUND use. For all splices, use water tight connectors. (Do not exceed 600 ft.)
the “HOT” wire which is connected directly to a station output terminal in the controller. The other wire is “COMMON” and may be joined to the common wires of other valves with one wire running to the common terminal of the controller. Check operation using the controller.
2
Common
Solenoid
Common
Wire
Valve
Controller Terminals
Hot Wires
