Armatur wird wohl gemeint. Good luck, Henry Schroeder!

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Note added at 2003-04-20 09:40:27 (GMT)
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Re.: Collins German Dictionary

Ich gehe davon aus, dass Amatur nur ein Tippfehler war und es sich um Armatur handelt.

It is certainly a "typo" for Armatur; since, however, it is in the singular, I think it should be translated here as above. "Wash-handbasin with tap and mixer-valve", or "wash-handbasin wish mixer tap". I don't remember yet having met a washbasin wih fittings other than taps.... (sorry, "faucets" for our American cousins).

This not to compete with the correct answer above, just for explanation. Armatur is easily mispronounced in German - and misspelled, accordingly. It happens a lot, as witnessed by your Google findings.

If you google for Amaturenbrett (dashboard = A*R*maturenbrett), you'll get some 3500 hits. I'm mentioning this for two reasons:
1. using a word that can't be mistaken to be anything else to prove my point about mispronouncing and misspelling
2. to show that the word Armatur has other meanings than just fittings. I'm somewhat surprised to see that many wrong suggestions. Would you call an Armaturenbrett an fittings board? I don't think so.

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Note added at 2003-04-20 13:43:22 (GMT)
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BTW - you\'ll find even a company producing fittings referring to themselves as \"Amaturenbau\". Amazing.

or just fixtures. Those are the things you see, like faucets. In the context of Armatur and Mischventil, you would be interested if the sink you buy includes the plukmbing fictures. The Mischventil is an integral part of the faucet and is not called out seperately with american products. Sinks hardly ever include things you don't see: fittings like couplings, reducers, unions (Rohrmuffen.
See Google on "Plumbing +fixtures":
Information on Kohler plumbing fixtures, faucets,
Moen is one of the world's largest manufacturers of plumbing supplies, including kitchen faucets,
Manufacturers and distributors of plumbing fixtures and specialty plumbing products.
American Standard manufactures plumbing fixtures and faucets for kitchen and bath.
Sells kitchen and bath plumbing fixtures, vanities, cabinets, countertops,
Eljer Plumbingware is a leading manufacturer of kitchen and bath fixtures, faucets and accessories...
Manufacturer of Stainless Steel Plumbing Fixtures.
Water-saving Plumbing Fixtures. ... All plumbing fixtures that use water will be low-flow fixtures,
Molding & Millwork. Plumbing Fixtures. Pools, Spas & Saunas.
Manufacturer of non-residential plumbing fixtures and washroom accessories.

From all your other questions, it's my guess that you're dealing with a large, commercial installation (e.g. for restaurants, hospitals, etc.).
Therefore, I believe it's one of those stainless steel sinks fitted with all kinds of gadgets such as showerhead, water brush, etc. with which large parts are cleaned manually (Handwasch).

In that case, the Armatur refers to the cleaning gadgets, and makes sense (especially as the mixer is a separate unit on these installations).