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Old 10-06-2012, 11:08 AM   #1
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Ok for PVC to remain under pressure?


putting in a sprinkler system and another hose bib. Using 1" pvc and woke up this morning with a fear that pvc under constant pressure (90psi) is a broken pipe just looking for an early reason to show up.

was my dream just that or is there any reason to be concerned?

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Old 10-06-2012, 11:14 AM   #2
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Ok for PVC to remain under pressure?


If the pipe is rated for the pressure and installed correctly, I wouldn't worry TOO much.

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Old 10-06-2012, 12:22 PM   #3
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Ok for PVC to remain under pressure?


If you used schedule 40 PVC....it's rated for about 270 PSI.

Here is a chart showing the pressures for schedule 40 and 80

http://www.engineeringtoolbox.com/pv...res-d_796.html

PVC is great for sprinklers....and yes, I ran PVC from my house to my garage for the back yard water hose.....

BUT....I went to great lengths to make sure the PVC is protected from damage.....PVC will not tollerate impact damage as well as copper will....hence, I would not use it in a area where I know my kids would run into it.....

As long as it's protected....your fine.....I assume you have a ball valve in front of it so you can shut it off if there is an issue?
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Old 10-06-2012, 12:53 PM   #4
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Ok for PVC to remain under pressure?


Quote:
Originally Posted by ddawg16 View Post
If you used schedule 40 PVC....it's rated for about 270 PSI.

Here is a chart showing the pressures for schedule 40 and 80

http://www.engineeringtoolbox.com/pv...res-d_796.html

PVC is great for sprinklers....and yes, I ran PVC from my house to my garage for the back yard water hose.....

BUT....I went to great lengths to make sure the PVC is protected from damage.....PVC will not tollerate impact damage as well as copper will....hence, I would not use it in a area where I know my kids would run into it.....

As long as it's protected....your fine.....I assume you have a ball valve in front of it so you can shut it off if there is an issue?
Good points!
Some people use the thin wall PVC for irrigation. It will not take abuse if left exposed
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Old 10-06-2012, 01:52 PM   #5
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Ok for PVC to remain under pressure?


Yeah, I'm using sched 40 and it says 450 psi so I figure I'm safe there. And yes, priming and gluing deburred joints.

I did put a ball Valve but a good portion is going to be under concrete so my fear was after 3 years of continual pressure I was going to get a leak under my driveway/sidewalk.

Thanks for the help!
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