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-   -   How critical are perfectly straight cuts in pvc? (http://www.diychatroom.com/f7/how-critical-perfectly-straight-cuts-pvc-159142/)

jfryjfry 10-06-2012 10:06 AM

How critical are perfectly straight cuts in pvc?
 
doing a sprinkler system, and running a line for a hose bib.

I've cut everything by hand and the cuts are pretty straight, but I'd be lying if i said all, or even most, were perfect.

I know i know they should be perfect, but they are so very close.

Can any experienced plumber shed some light on this? thanks!

TheEplumber 10-06-2012 10:26 AM

Quote:

Originally Posted by jfryjfry (Post 1024998)
doing a sprinkler system, and running a line for a hose bib.

I've cut everything by hand and the cuts are pretty straight, but I'd be lying if i said all, or even most, were perfect.

I know i know they should be perfect, but they are so very close.

Can any experienced plumber shed some light on this? thanks!

In the real world, close is good enough. More important, IMO, is to deburr the pipe

jfryjfry 10-06-2012 10:42 AM

awesome peace of mind. thanks so much!
and yes, deburring the pipes. esp on the inside.

and to quantify the imperfection of my cuts, some of the earlier (read: worse) ones are at the most 1/8" off.

TheEplumber 10-06-2012 11:02 AM

Quote:

Originally Posted by jfryjfry (Post 1025025)
awesome peace of mind. thanks so much!
and yes, deburring the pipes. esp on the inside.

and to quantify the imperfection of my cuts, some of the earlier (read: worse) ones are at the most 1/8" off.

That's OK

ddawg16 10-06-2012 11:13 AM

Quote:

Originally Posted by jfryjfry (Post 1025025)
awesome peace of mind. thanks so much!
and yes, deburring the pipes. esp on the inside.

and to quantify the imperfection of my cuts, some of the earlier (read: worse) ones are at the most 1/8" off.

OMG....1/8" off?

Stop.....you must redo it all.......no more than .0001" from center.....otherwise, you might get a leak in about 200 years.

Ok....now that I've had my fun.....

Yea....your fine.......

As eplumber said....debur.....and make sure you give that fitting a good twist when you slip it on. This causes the cement to be evenly spread in the joint making for a better bond.

Alan 10-06-2012 11:40 AM

Quote:

Originally Posted by jfryjfry (Post 1025025)
and yes, deburring the pipes. esp on the inside.

IMO if you're using a ratcheting cutter, deburring the outside is even more important, because the burr will actually push the glue out of the fitting if you don't remove it.


If you're using a hacksaw or sawzall, just getting the rough chips off the edges is good enough.

DangerMouse 10-06-2012 12:09 PM

When I did mine, I used a plain old pipe cutter. (wheel type) and used the attached end to deburr the insides. The most important part is using the cleaner/primer first, then use enough glue to do the job well. The inspectors also don't mind seeing a bit too much purple, because they know you did it right that way. :)

DM

jfryjfry 10-06-2012 12:56 PM

Appreciate the help from you guys. experience is so valuable. Had wondered why SO impt to deburr outside and now I know!

I had read that the last 1/8" of the joints was interference and was the most impt part but I guess since it was on the Internet, it's worth what I paid for it.


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