I don't know that there's a specific name, nor a store that caries only such things.
You might purchase such things at any number of stores - a hardware store, a plumbing supply store, or a home improvement store. Also, they're not going to carry things that are only specific to kitchens. Bathrooms use all those items as well.
Even a store like WalMart here in the US has a very limited supply of some basic plumbing and electrical items. Perhaps not a sink or toilet, but I did once buy a cheap replacement faucet from Walmart when nothing else was open that time of night and I needed it right then.