Question regarding 90 degree connector

phantasm

Member

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Joined

Oct 7, 2006

• Jan 27, 2007

• #1

Any negative effects of using one at the intake of an MCP655? Looking at a routing issue and this is a possible solution. Thanks.

 

D

downer

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Joined

Apr 9, 2006

Location

PA

• Jan 27, 2007

• #2

90 degree elbows do hurt flow, especially when placed at the intake of a pump. I can't say to what degree one would hurt your flow. If you really can't get by without a 90 degree fitting, look for a "sweeping" elbow. A sweeping elbow doesn't bend quite as sharply.

 

D

Diggrr

Underwater Senior Member

Joined

Nov 29, 2001

• Jan 27, 2007

• #3

Yep.
I'd say the least damage would be done with using a copper pipe elbow of 3/8" (the ones I buy locally are a sweeping bend).
In copper pipe sizing, 3/8" = 1/2" actual OD for the pipe, so the elbows would be flared slightly larger at their female ends, and a water tight join to tubing is easy to do with a couple of spring clamps.

 

OP

phantasm

Member

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Joined

Oct 7, 2006

• Jan 27, 2007

• Thread Starter
• #4

Thanks. Other alternative is to add the 90 just at the res output to the pump. Maybe i'll look at that... or maybe i'll just rework the setup. Thanks again.

 

voigts

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Joined

Feb 11, 2005

Location

Tennessee

• Jan 27, 2007

• #5

The one place you really don't want a 90 is at the pump inlet. It really hurts flow (forget where I read the data from). 1/2" copper long sweep elbows (i.e mcmaster #5520K184) are the way to go for tight bends if needed.

 

Q

QuietIce

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May 7, 2006

Location

Anywhere but there

• Jan 28, 2007

• #6

voigts said:

The one place you really don't want a 90 is at the pump inlet. It really hurts flow (forget where I read the data from).

Click to expand...

What he said - doubled! - the last place you want an elbow is at the pump inlet. Anywhere else is fine ...