Protect Your Emitters and Prevent Air Locks
When operating a drip irrigation system on uneven terrain or hillsides, the sudden shutdown of water flow can create a powerful vacuum inside your lines. This vacuum can physically suck dirt and debris backward into your emitters, causing permanent clogs. You can solve this problem easily and automatically by installing Air Bleed Valves at the highest points of your irrigation layout.
These essential components perform a dual action. When your system shuts off and pressure drops below 5 PSI, the valve opens to let air in, instantly breaking the vacuum. Conversely, when the system turns on, the valve lets trapped air out, preventing damaging air locks and water hammer from stressing your 1/2″ mainline tubing and fittings. Available with 1/2″, 3/4″, or 1″ Male Pipe Thread (MPT) bases, these valves are a hassle-free way to make your irrigation system more reliable.
- Prevents Clogged Emitters: Breaks the vacuum effect on uneven terrain, preventing dirty water and soil from being sucked back into your drippers.
- Eliminates Air Locks: Purges trapped air from high points during system startup, ensuring even water flow and preventing pressure spikes.
- Fully Automatic: The internal float mechanism responds instantly to pressure changes, requiring no manual operation.
- Multiple Sizes: Available in 1/2″, 3/4″, and 1″ MPT sizes to easily integrate with standard PVC or poly threaded fittings.
Detailed specifications for system planning.
| Specification | Details |
|---|---|
| Connection Type | Male Pipe Thread (MPT) |
| Available Sizes | 1/2″, 3/4″, and 1″ MPT |
| Maximum Operating Pressure | 80 PSI |
| Activation Pressure | Opens when pressure drops below 5 PSI |
| Required Installation Angle | Vertical (Upright) |
Proper placement is key to stopping air locks and vacuum siphoning.
Step 1: Identify High Points
Locate the highest physical elevations along your mainline tubing. If your property has multiple separate hills, identify the peak of each zone.
Step 2: Install a Threaded Tee
Cut your mainline at the highest point and install a PVC or Easy-Loc Tee that features a Female Pipe Thread (FPT) port facing upward.
Step 3: Apply Teflon Tape
Wrap the Male Pipe Thread (MPT) base of the Air Bleed Valve with 2 to 3 layers of Teflon tape to ensure a watertight seal.
Step 4: Thread and Orient
Thread the valve into the FPT tee. Hand-tighten until secure. Crucial: The valve must be oriented perfectly upright (vertical) for the internal float to operate correctly.
