Fittings for air, water, fuel, and chemical systems in brass, stainless steel, and engineered plastics. Apex Flow Solutions stocks thousands of sizes and configurations across compression, flare, hose barb, push-to-connect, pipe, PVC, camlock, and insert styles, all sold by the single unit with the real part number on every listing and flat, itemized shipping before checkout.
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1/4 in. Brass Female NPT x 1-1/2 in. Long Anchor Connector -
1/4 in. Brass Female NPT x 15/16 in. Long Anchor Connector -
1/2 in. Brass Female NPT x 1-1/2 in. Long Anchor Connector -
1-1/8 in. OD Brass Steel Washer for Anchor Connector #28304 -
Brass Washer for Anchor Connector #28301 -
1/8 in. Brass Captive Sleeve Nut -
1/8 in. Brass Compression Union Body -
1/8 in. x 1/16 in. Brass Compression x Male NPT Adapter -
3/16 in. Brass Barstock Compression Elbow -
3/16 in. OD x 1/4 in. Brass Compression x Male NPT Adapter with Sleeve Nut -
3/16 in. OD x 1/4 in. Brass Compression x Male NPT 90-Degree Elbow with Sleeve Nut -
3/16 in. OD x 1/8 in. Brass Compression x Male NPT 90-Degree Elbow with Sleeve Nut -
3/16 in. x 1/8 in. Brass Compression x Male NPT Run Tee -
1/4 in. Brass Captive Sleeve Nut -
1/4 in. Brass Compression Union with Sleeve Nut -
1/4 in. OD x 1/4 in. Brass Compression x Male NPT Adapter with Sleeve Nut -
1/4 in. OD x 1/8 in. Brass Compression x Male NPT 90-Degree Elbow with Sleeve Nut -
1/4 in. White Nylon Compression Union -
1/4 in. x 1/2 in. Brass Compression x Female NPT Elbow -
1/4 in. x 1/2 in. Brass Compression x Male NPT Elbow -
1/4 in. x 1/4 in. Compression x Female NPT Polypropylene Elbow -
1/4 in. x 1/4 in. Compression x Male Polypropylene Branch Tee -
1/4 in. x 1/8 in. Compression x Male NPT Polypropylene Adapter -
5/16 in. x 1/4 in. White Nylon Reducing Compression Union
Shop fittings by type
Compression fittings seal on tubing without flaring or soldering and are standard for metering, instrumentation, and water lines, with dedicated adapters, elbows, tees and caps, and unions. Flare fittings give a metal-to-metal seal for refrigeration, gas, and fuel, alongside inverted flare and flareless styles. Hose barb fittings connect flexible hose, and push-to-connect fittings, including DOT and plastic push-in lines, make fast tool-free air connections. Round it out with PVC fittings and nipples, pipe fittings, insert fittings, camlock fittings, garden hose fittings, and bulkhead fittings.
How to choose a connection type
Match the fitting to how the line terminates. Use compression for rigid or semi-rigid tubing where you cannot flare or solder, flare for refrigeration and gas lines that need a reliable metal seal, and hose barb for flexible hose clamped over the barb. Push-to-connect is fastest for air and pneumatic lines with no tools. Threaded NPT pipe fittings join standard pipe, and camlock is built for quick coupling and uncoupling on bulk liquid transfer. When in doubt, match the fitting thread or tube size and the material to your system before ordering.
Choosing a material
Brass is the general-purpose choice for water, air, oil, and gas. Stainless steel handles corrosive and high-purity service. Nylon, polypropylene, and PVC suit chemical dosing, water treatment, and low-pressure lines where metal would corrode. Seal materials on valves and check fittings come in Buna-N for general use and Viton for hydrocarbons and aggressive chemicals.
Common questions
Compression or flare fitting?
Compression fittings are quicker to assemble and need no special tools, which suits water and instrument tubing. Flare fittings take a flaring tool but give a stronger, vibration-resistant metal seal, which is why they are standard on gas, fuel, and refrigeration lines.
What is the difference between NPT and push-to-connect?
NPT fittings thread together and seal on tapered threads, best for permanent pipe joints. Push-to-connect fittings grip the tube with an internal collet for a fast, tool-free, reusable connection, best for air and pneumatic lines.