The fastest way to find, compare and buy air release valves for water systems.
Describe the pipeline size, operating pressure, or high-point venting problem you have. ChatMRO finds the exact match, shows alternatives, and gives you a quote — in seconds. No part number needed.
Updated
AI-generated imageAn air release valve (ARV) is a small-orifice, float-and-needle valve installed at high points along a pressurized water pipeline that continuously vents accumulated air pockets while the system remains in operation. As entrained air collects at a high point, the internal float drops with the falling water level, opening a small precision orifice to release the trapped air; once water refills the chamber, the float rises and reseats the orifice, sealing tight against the operating pressure.
Water and wastewater utilities, industrial plant engineers, and pipeline designers rely on air release valves because entrained air in a pressurized line increases frictional pressure loss, causes erratic and unpredictable flow, and forces pumps to work against additional head — problems that worsen at every high point where flow velocity drops and air naturally collects. Air release valves are distinct from air/vacuum valves (which use a large orifice for filling and draining) and combination air valves (which integrate both functions in one body); AWWA Manual M51 provides the standard industry methodology for selecting valve type, size, and placement along a pipeline profile.
Common configuration: sizes from roughly 1/2" up to 8" or larger, orifice sizes from 1/16" up to 3/8"+ depending on required venting capacity and operating pressure, and pressure ratings commonly at 150 psi standard with higher-pressure and higher-temperature variants available. Body/trim materials include ductile iron, cast iron, bronze, and stainless steel, with internal floats and needles typically in stainless steel or Delrin.
Stop second-guessing. Match your use case below — then let ChatMRO's AI surface the exact valve type, size, and alternatives in one natural-language search.
Standard potable water pipelines needing continuous small-orifice venting at high points. Clean water ARVs dominate here.
Locations requiring dedicated air release protection distinct from air/vacuum valve locations. Standard ARVs and combination units dominate here.
Wastewater applications needing corrosion-resistant construction and maintenance access for solids buildup.
Air release valves for water systems are supplied by valve automation specialists such as APCO (DeZURIK), GA Industries, and Val-Matic, whose air valve range spans clean water ARVs to sewage-rated and combination air valve designs. Here's how to navigate the class without a 40-tab browser session.
ChatMRO indexes air release valve inventory across manufacturers. Search any product by description, application, or rough spec.
The distribution main workhorse. 1/2"–2" sizes, 3/16" orifice standard for 150 psi operation (500 psi body rating on select models). Stainless steel, bronze, or Delrin internal mechanism. Wide variety of orifice sizes to match AWWA M51 sizing charts.
Search ARV/200A Style Series →Double-orifice design combining air/vacuum and air release functions in one compact body. 1"–8" (25–200mm) ductile iron, threaded NPT on smaller sizes. Baffled inlet protects float; Buna-N seat for drop-tight shutoff.
Search AVC/140C Style Series →1/4" (6mm) orifice for operation up to 150 psi. Corrosion-resistant construction with optional isolation gate valves, blow-off/flush valves, and backflushing attachments to clear settled sediment from the valve body.
Search Sewage Air Valve Series →Use this table as a decision shortcut. Ask ChatMRO for the exact part once you know which row fits your spec.
| Valve Type | Orifice Design | Size Range | Best For | Typical Pressure | Media | ChatMRO Verdict |
|---|---|---|---|---|---|---|
| Air Release Valve (ARV) | Small orifice only | 1/2"–3" | Continuous venting at pipeline high points during operation | 150 psi standard | Clean water | Most common choice for ongoing air management on pressurized mains |
| Air/Vacuum Valve (AVV) | Large orifice only | 1"–12"+ | Filling/draining events, vacuum protection | Model-specific | Clean water | Required wherever pipelines are periodically filled or drained |
| Single Body Combination Valve | Large + small orifice | 1"–8" (25–200mm) | Compact vault installations needing both functions | Model-specific, ~150 psi | Clean water | Best space-saving option when both venting types are needed at one point |
| Dual Body Combination Valve | Separate AVV + ARV bodies | 1"–12"+ | Higher-capacity combination venting, easier individual maintenance | Model-specific | Clean water | Use when isolating each function for maintenance matters more than compactness |
| Sewage Air Release Valve | Small orifice, corrosion-resistant | 2"–4" | Wastewater/sewage force mains | 150 psi standard, higher available | Sewage/wastewater | Go-to for force main high points with solids-laden media |
| Generic Import Air Valve | Variable | Variable | Budget, occasional light use | Manufacturer-stated only | Clean water | Verify AWWA compliance and orifice pressure rating before municipal use |
Not sure which row is yours? Describe your application to ChatMRO and get an instant AI-matched recommendation with datasheets.
Traditional catalogues force you to know the exact MPN before you find anything. ChatMRO flips that: describe what you need in plain English, and the AI finds the right air valve from 30M+ indexed parts.
In plain language — by pipeline size, operating pressure, or venting problem. No MPN required.
Natural language processing maps your description to the closest-fit products across brands and specs.
Cross-brand equivalents, lower-cost substitutes, and in-stock alternatives shown side-by-side.
Add to cart or request RFQ directly from the results. No phone calls. No email chains.
Whether you're a municipal engineer designing a new transmission main, or a utility maintenance team replacing failed air valves — use this framework before you procure.
High points needing continuous venting during normal operation call for an air release valve; points where the line is filled or drained need an air/vacuum valve; locations needing both should use a combination valve. AWWA Manual M51 provides standard placement guidance.
Use manufacturer venting capacity (SCFM) charts against your line's operating pressure — if your calculated point falls between two standard orifice sizes, select the larger one per common industry practice.
Standard ARVs are commonly rated for 150 psi operation, with some models rated to withstand significantly higher body pressure — confirm both orifice operating pressure and overall body pressure rating against your system.
Clean water applications typically use stainless steel or bronze trim; sewage and wastewater applications need corrosion-resistant construction and often benefit from backflushing attachments to manage solids buildup.
Specify isolation valves (gate or butterfly) at the air valve connection point so the air valve can be serviced or replaced without shutting down the main line.
Air release valves' small orifice cannot handle the large air volumes involved in filling or draining a pipeline. Search by function on ChatMRO — the AI surfaces exact matches AND available substitutes for your specific installation point.
An undersized orifice won't adequately relieve air even on a properly sized connection. Use AWWA M51 venting capacity charts against your actual operating pressure rather than guessing based on pipe diameter alone.
Sewage and wastewater applications require corrosion-resistant construction and often backflushing capability to manage solids — standard clean water ARV materials may fail prematurely in this service.
Describing your application to ChatMRO takes 30 seconds. The AI reads air release valve spec sheets across brands so you don't have to.
Just describe what you need. ChatMRO finds the right air release valve for your water system in seconds.
Air release valves are among the most essential small-orifice components in pressurized water and wastewater pipeline systems, preventing the flow inefficiency, water hammer risk, and pump strain caused by trapped air pockets. Manufacturers such as APCO (DeZURIK), Val-Matic, and GA Industries command significant market presence due to their AWWA M51-compliant sizing methodology, broad orifice size ranges, and dedicated clean water and sewage-rated product lines. Procurement professionals and municipal engineers in India, Southeast Asia, and North America regularly source air release valves for water distribution mains, transmission pipelines, wastewater force mains, and the pump stations where a swing check valve holds back reverse flow on the discharge.
ChatMRO simplifies this procurement process by providing AI-powered natural language search across a catalogue of 30 million+ indexed industrial parts. Engineers and buyers no longer need to memorize model codes or navigate multi-level filter trees to find the right air valve. A simple description of the pipeline size, operating pressure, or air venting problem is sufficient to surface the correct product alongside cross-brand alternatives and real-time pricing.
