DIG - 1/2'' Air vacuum relief valve - 18-028
DIG - 1/2'' Air vacuum relief valve - 18-028 is backordered and will ship as soon as it is back in stock.
Why so “cheap” at CheapSprinklers? Low prices by design — same parts, no compromise
Our prices are lower because of how we run our business — not because the product is different — and we pass those efficiencies directly on to you.
You’re receiving the same brand-new, factory-sealed item sold by big-box, supply-house, or bloated online-warehouse sellers — delivered direct to you, for less.
- Bulk Purchasing: We buy in high volume to lower per-unit cost
- Low Overhead: No physical storefronts or unnecessary middlemen
- Price-First Model: Our business is built around keeping everyday prices as low as possible — so you can put the savings toward other projects or your business.
- Fast & Efficient Fulfillment: Streamlined US warehouse operations keep costs down and orders moving fast.
The Result: Genuine products with full manufacturer warranty — delivered fast, without paying inflated big-box, supply-house, or bloated online-warehouse markups for the same parts.
CheapSprinklers Product Guarantee How we guarantee authenticity and warranty coverage
All products sold by CheapSprinklers are brand new and factory sealed. This DIG Drip Fitting (18-028) is sourced directly from DIG and ships from us in new-in-box retail packaging.
We’ve been sourcing and supporting irrigation products for professionals and DIYers through both brick-and-mortar and online channels since 1981.
If there’s ever an issue, CheapSprinklers stands behind what we sell and will help coordinate any warranty claim or replacement.
- Genuine New DIG Drip Fitting: no knockoffs, no refurbished, no old stock
- Factory Sealed: shipped in original new-in-box retail packaging
- Current Production Inventory: no discontinued or clearance stock
- Complete DIG Warranty: full manufacturer coverage begins when your order is delivered
The Result: Peace of mind. You’re installing top-quality equipment — and if there’s ever an issue with this Drip Fitting, you’re fully supported by CheapSprinklers and DIG.
DIG's 1/2" Air Vacuum Relief Valve with male pipe thread delivers optimum performance and increased efficiency of a drip system by preventing back suctioning of debris into the drip line. The relief valve allows air to escape the drip line during the system's initial start and until the pipe or drip line is full of water. It also allows air to enter back into the drip line when the drip zone is turned off. The Air Vacuum Relief Valve helps prevent clogging in sub-surface drip irrigation systems resulting from back suction of debris under vacuum conditions. Install the valve at the highest point of a drip line installation.
Features
- Reduced maintenance requirements and extend drip system life
- Smooth and reliable operation
- Eliminates air pockets within a system zone
- Releases air from the drip line when the zone is turned on
- Allow air to freely enter the system when the zone is shut down
- Prevents vacuum conditions and stops debris or particles from entering the drip line via the drip emitters or drip line outlets
- Help in preventing suction that can cause the drip line to collapse, potentially pulling in dirt that can block the drip emitters
- Perfect sealing under very low system pressure
- Easy to handle and maintain
- Constructed of UV-resistant, durable plastic material to withstand the most adverse conditions
Install the Air Vacuum Relief Valve after the drip zone, along the drip line laterals and at the highest point in the drip system layout. Install one Air Vacuum Relief Valve per zone or per each 10 GPM (33 LPM).
Specifications
- Operating pressure: Up to 140 PSI (9.8 BAR)
- Temperature range: Up to 130°F (54°C)
- Inlet size: 1/2" MNPT
- Material: High impact plastic with Buna-N seal
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