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Fittings, Valves & Tubing for Stack Testing and CEMS

A-Best Industrial Inc. Fittings, Valves, and Tubing supplies source testers, CEMS technicians and analyzer shops with the fittings, quick connects, valves and tubing that keep sampling systems leak-tight. We're an authorized DK-Lok distributor at the Port of Los Angeles in San Pedro, CA. Orders ship the same day we receive your PO, and we're available 24/7 for emergencies.

What we supply for stack testing

DK-Lok Tube FittingsUnions, connectors, elbows, tees, bulkhead fittings, and caps and plugs to seal lines between runs. Shop tube fittings
Quick ConnectsDK-Lok quick connectors for probe, umbilical and analyzer connections that come apart every setup. See quick connects
Cal Gas & Sample ValvesNeedle, ball, check and metering valves and instrument manifolds for calibration gas and sample manifolds. See needle valves
TubingStainless steel, PTFE (Teflon) and nylon tubing, plus electropolished tubing, in lengths and coils. See tubing
HoseBraided stainless and PTFE-lined hose assemblies built in our San Pedro shop. See hose assemblies
Gauges, Filters & Leak DetectionStainless pressure gauges, in-line and tee filters, regulators, and Gator Leak Detector for leak checks. See gauges

Built for field crews

  • Kits for test trailers: send us your standard list and we'll build pre-packed part kits, so restocking a trailer is one order.
  • Complete shipments: we aim to ship every order 100% complete, so you're not waiting on one missing ferrule.
  • 24/7 emergency line: when a fitting fails on site, call (310) 892-3503 or (310) 987-0192.
  • Will-call pickup: grab parts at our shop at 1911 N. Gaffey Street, Suite D, San Pedro.
  • Free safety training: our free course covers tube fitting installation and tube bending.

Works with the fittings you already run

DK-Lok tube fittings are interchangeable and intermixable with Swagelok and Parker A-Lok for like size and material, properly assembled per the DK-Lok catalog. See the ASTM F1387 intermix test or send us your part numbers through our cross reference.

Frequently asked questions

Can I use DK-Lok fittings on Swagelok-style probes and sample lines?
Yes. DK-Lok tube fittings are interchangeable and intermixable with Swagelok and Parker A-Lok for like size and material, per the ASTM F1387 test report.

Do you carry PTFE (Teflon) tubing?
Yes. We supply PTFE, nylon and stainless steel tubing. See our tubing page.

Can you build part kits for our test trailers?
Yes. Send us your list and we'll build pre-packed kits.

How fast can you ship?
Orders ship the same day we receive your PO, and you can pick up at will-call in San Pedro.

Restocking a trailer or building a sample manifold? Call 310-833-3353 or email sales@abesttube.com.

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Swagelok and Parker A-Lok are trademarks of their respective owners. A-Best Industrial Inc. Fittings, Valves, and Tubing is not affiliated with Swagelok or Parker Hannifin.
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