305DC-ASV Anti-Siphon Valves

The 305DC-ASV series plastic anti-siphon valves with a 6-12 VDC solenoid can be used with our battery operated controllers and LEIT 2 ET solar powered controller. Designed for reliable operation, the anti-siphon valves feature flow control handles for flow adjustment and manual shutoff, internal manual opening via the solenoid and external bleed via the bleed screw for smooth opening and closing.

Anti-siphon Valve Features

  • Anti-siphon valve combines a remote control valve and backflow preventer in one unit
  • Constructed of UV-resistant PVC body and glass-reinforced nylon bonnet with a stainless steel spring and pins
  • High flow with low pressure loss
  • Normally closed
  • Operates in a wide range of flow rates
  • Utilizing self-cleaning EPDM diaphragm with seal design assembly
  • High performance, 6-12 VDC two-way magnetic solenoid
  • Flow control handle for water flow adjustment and manual shutoff
  • External or internal manual bleed allows quick and easy valve opening and closing
  • Excellent leak-free performance utilizing self-cleaning EPDM diaphragm and seal design assembly
  • Encapsulated EPDM seal washer built into the atmospheric backflow assembly
  • Encapsulated solenoid plunger for quick and easy service and maintenance
  • Manual or automatic operation
  • Smooth valve opening and closing prevents pressure surge hazards:


how to specify
Model Description
In-line valve for use with 720A, 740A, 760A and LEIT-2 controllers
305DC-ASV-100 1 in. ASV with 305DC solenoid - 1 in. ASV
305DC-ASV-075 3/4 in. ASV with 305DC solenoid
  • Body Styles: Anti-siphon valve with 6-12 VDC solenoid
  • Operating pressure: 20 to 150 PSI
  • Valve size: 3/4" and 1" with FNPT inlet and outlet
    • Flow rate 3/4”: .25 to 20 GPM ###Specifications
    • Flow rate 1”: .25 to 25 GPM
  • I.A.P.M.O, UPC and ANSI compliance:
  • Solenoid: 6-12 VDC, two-way magnetic latching, normally closed
    • Voltage rate: 6-12 VDC
    • Coil Resistance: 4.7Ω +/- 0.3
    • Pulse Width: minimum 10 mSec
  • Operation mode:
    • Red + and white – latch to open
    • Red – and white + released to closed
  • Lead wires: 18” (45 cm) UL 1015, AWG 16, 300V - red and white wires
  • Control orifice: 0.65 +/- 0.0002 (1.7 mm)
  • Temperature range: up to 110 Fahrenheit (0-43 C)
  • Material:
    • Body: rigid PVC
    • Bonnet: glass-reinforced nylon
    • Solenoid: glass-reinforced nylon
    • Spring and pins: Stainless steel
  • Center line distance: 3.750” (952 mm)

Note: Install the anti-siphon valve a minimum of 8” above ground or above the highest sprinkler head

CAD details

CAD Files

Click here to download DIG Corporation's high quality design files for your next project.

  • [+]   LEIT-2ET Weather Based, Wireless Irrigation System
  • Leit-2groupws_clip
    1 Detail controller valve box Thumb_l1-et_typical_layout_detail_valve_box-_not_green_roof PDF DWG DXF
    2 Detail controller column mounting Thumb_l2-et_typical_layout_detail_pole_mount PDF DWG DXF
    3 Detail valve (green roof) mounting Thumb_l3-et_typical_layout_detail_valve_box_green_roof PDF DWG DXF
    4 Detail drip zone assembly Thumb_l4-et_valve_assem_p53-075 PDF DWG DXF
    5 Detail weather station with & without wind sensor Thumb_l5-et_weather_station PDF DWG DXF
    6 Rain sensor detail Thumb_l6-et_leit_2_sensor_wiring PDF DWG DXF


  • Thumb_30-930_rev-e__305_solenoid_assembly

    S-305DC Solenoid Assembly


Corporate Information

Where To Buy
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Vista, CA 92081 USA

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