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Hi,

I'm not a master plumber... actually I'm neither a master or a plumber...

But I'm pretty sure most guys would tell you not use ANY 90's

They seem to prefer the use of TWO 45's in place of any 90 at all

(connected by a short piece of pipe).

I think the reason is that solids have more of a tendency to get stuck in a 90.

The two 45s create a wider , or at least more gradual angle.

The fear, just as with too much fall, is that the water will go through alot faster than the solids and leave them behind.

Hope this helps

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Q: Can I double 90 a toilet drain I want to move toilet flange six inches the easiest way is cut 6of pipe off and do back to back 90's will this make a problem flushing how about close quarters 90's?
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