  Couplers and Special FittingsCouplers for all of your plumbing needs. JDA carries a wide variety of couplers, we can't imagine a plumbing job you couldn't use them on. The couplers are available for male-to-male, female-to-female, and male-to-female thread in AN and NPT versions. JDA even makes swivel-to-swivel couplers, to make routing lines a snap
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