long turn vs regular 90's

lizzy

new house, 1500 sq. ft.
2 story on a crawl space, boiler on 1st floor,
2 single loop zones and 2 circulator pumps on supply side of boiler,
copper finned radiation.

I am going to mount and connect all the baseboard radiation myself once the heat load for each room is done. I will leave the the 2 supplies and 2 return pipes stubbed off in the vicinity of the boiler. Then a professional will hook up the boiler and fire it.

He told me to use all long turn 90's whenever I make a turn either sideways or up and down. The guy at the plumbing supply store says it doesn't matter what type of 90 is used since the system is pressurized.

Does it matter which type of elbow is used?
I have never seen a long turn 90 with a bleeder on it. And besides, I have about a hundred regular 90's in my shop.

gerry gill

well, there is less friction loss

with long turn 90's, less turbulance, and the dead men would smile on you...but the regular 90's would work..

Unknown

I agree

It shouldn't make a big difference using long or short 90s on a baseboard heat zone . We routinely install over 100 feet of baseboard , maybe 50 feet of pipe and 20 to 25 ells in a Levitt style home - same size as yours - and the homes heat fine .

hr

As long as you don't use

all 100 of those you have in one loop! Piping tables will show you the pressure drop through a 90° fitting. a B&G System Sizer is a good easy to use device for calculating pressure drop in a circuit. The HDS software is another nice program for designing baseboard loops.

Long sweeps would be kinder to flow, better yet PAP tube and use the adapter 90's at the board.

I did a bb job last year with a REMS Curvo and a T-Drill and went completely fitting free.

hot rod

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