Yes, I missed that he was considering two 90's, because in many cases
you would use one 90 or two 45s to achieve the same direction
change. So re-doing the math, he's save about 6 ft equivalent of
pipe. Which means all other things being equal, I'd use the two 45's.
The more bend, the more velocity loss which is perceived as low pressure
when a faucet is open. It is beneficial to minimize the amount of bends
in a run of pipe. If a large number can not be avoided, stepping up to
the next larger pipe size will help compensate for the restrictions.
There are several factors that help or hinder water flow. The area
of study is called "fluidics" and often taught in mechanical
engineering courses. For home plumbing, it probably doesn't matter if
you use 45 or 90 degree elbows. I prefer the 90-degree bend and only
use the 45-degree elbow if required.
They are still made (long sweep copper tube elbows) & are available
(at a minimum) at McMaster.
When I wonder if something is "available", I use McMaster as an
If McMaster has it, it's got to be available elsewhere as well,
probably for less.
If I'm in a hurry or dont want to research another source, I buy it
Pay with a CC and purchase before noon, I can have it before end of
business that day or early the next day.
I used to say......... "if it ain't in the McMaster catalog, it
probably doesn't exist and you probably don't need it anyway."
Thank you for your kind wisdom. Isn't that like
Ralphs Pretty Good Grocery. I heard that on Prarie
Home Companion, years ago. I seldom listen to NPR
(National Liberal Radio). But it was on, the one
time I was visiting my Dad.
As long as the end-of-the-line is short in distance and smaller in diameter
than the source up to that point, it's always going to be fine unless
something odd comes into play. And especially if you leave the lo-flow
restrictor in place - heck, you could probably feed that with 1/4" pipe<G>!
Personally, first thing I do with a shower is remove the restrictor
especially if it's one of the temperature-monitoring non-scald types, which
is about all you can buy today. I love that constant temp setting; let them
flush the toilet and run the washer; all I see is a difference in water
pressure but no temp changes of more than barely noticeable.
Newsgroups are great places to get assistance.
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