In plumbing they have fittings called street fittings. Where does the term street come from?

Question

Used in this context what is the definition of street?

Answer 1

A street elbow is a type of plumbing or piping fitting intended to join a piece of pipe and another fitting at an angle. The difference between a "street" elbow and a regular elbow is the nature of the fittings on either end.



A regular elbow has hub or FIP on both ends. A hub is a female ABS, PVC or copper pipe receiver; FIP denotes "Female Iron Pipe" threads, that is, it receives threaded MIP iron, brass or plastic pipe on both ends. FIP is also known as FPT, Female Pipe Thread, and MIP denotes MPT Male Pipe Thread. Generically, these are known as NPT fittings (National Pipe Thread fittings).



A street elbow has a female fitting (hub or FIP) on one side and a male pipe or MIP fitting on the other end. The advantage of the street elbow is that it can be connected directly to another fitting without having to use a short connecting piece called a pipe nipple.



Street elbows are available in 90°, 45° and 22.5° bends. They can be used in water supply, drainage, sewer vents, central vacuum systems, compressed air and gas lines, HVAC, sump pump drains, and any location where plumbing fittings would be used to join sections of pipe.

Answer 2

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Plastic can be attached to compression fittings without problems. Just make sure you put an insert into the end of the plastic pipe to strengthen it and then tighten the fitting as normal. Likewise plastic fittings can be used on copper as long as the pipe is clean and free from burrs.

Answer 3

I don't speak with authority, but I offer this as my opinion... I would say that in this case the word "street" is a corruption of the word "strait". This word can mean 'narrowness' or 'confined space'. Therefore a street elbow is intended to be used where there is not enough room for a normal elbow/nipple combination to be used.