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The HAM-LET 3101803 is a brass compression tube union designed to join two compression-end tube lines in a single inline connection. Built to ASTM B68 and ASTM B75 standards, this union provides a reliable, leak-resistant seal without soldering or threading. The overall length measures 1.77 inches, keeping the fitting compact in tight plumbing or instrumentation runs. It is suited for installation by licensed plumbers, HVAC technicians, and instrumentation pipefitters working on low-pressure fluid or gas distribution systems. The all-brass construction resists corrosion and holds up in the rated temperature range of -20 degrees C to 37 degrees C.
This compression union is used in residential and light commercial plumbing, HVAC refrigerant-adjacent tubing, and instrumentation tubing applications where an inline union connection is needed. It is well suited for runs where tube sections must be joined or serviced without cutting into permanent fittings. The Compression x Compression end configuration accepts standard compression tube ends on both sides, making field assembly straightforward with basic hand tools.
Cross-references to Swagelok part number B-600-6. Designed as an OEM-style replacement or direct substitution for standard compression tube union fittings in plumbing and instrumentation tubing systems.
Installation should be performed by a licensed plumber or qualified pipefitter following applicable IPC or local plumbing code requirements. Shut off and depressurize the supply line completely before disassembling or installing any compression fitting. Do not overtighten compression nuts, as over-compression can deform the ferrule and compromise the seal. Inspect tube ends for burrs or ovality before seating the fitting to ensure a proper compression seal.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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