As part of the heart of plumbing, pipe fittings are very important to the quality of a structure’s plumbing system. Knowing this, A.Y. McDonald Mfg. Co. has invested a lot of efforts into providing the most efficient and versatile fittings found in the industry. From caps to couplings, be able to find exactly what you are looking for (and more) with A.Y. McDonald Mfg. Co. threaded fittings.

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