Cap Off Sprinkler Heads (disabling sprinkler heads) - Correctly 

Thanks for the nice comment!

@shohoku81 as long as the bottom of the capped off sprinkler pipe have soil supporting the pipe, it should not break or crack due to pressure from top. Generally small diameter PVC pipe are more rigid than soil so it should move soil before cracking. Of course re-route is the safest thing to do. However it cost a lot to re-route. At my home I have a water leak monitoring service free from my water district. If I have an on-going leak, I would know it within 24 hours, check if you have something like this.

Sorry to hear about your covered up sprinkler head, you have to cap otherwise it will keep watering and will cause a empty space under your concrete. Try to find / trace from the sprinkler valve.

@M M correct, plumbers PVC glue/cement not needed, screwing the cap tight is enough to provide a good seal. 99% of all sprinkler connections are screw or barb connections without use of glue/cement. Of course if you want to be extra secure you can put glue

You can buy shut off caps that screw into the top of the head after removing the guts. When blowing your system out for winter just take the cap off.

@Edward Rose You are right, in perfect scenario and unlimited time/budget you would backtrace and dig out all sprinkler pipes those will be under concrete. But backtracking and removing existing sprinkler pipes is very time consuming. Or you can cut off directly from valve if you know that branch of sprinkler is the only branch from a particular valve. In my opinion the amount of effort to perform both of those above are very costly. There is a small chance pipe under concrete and a few inches of dirt will leak in future, if it does leak you will probably notice with water pooling. Imho I would rather take that chance and fix later.

If you have Telfon tape handy... sure why not, but it is not necessary, I have done this pipe cap many times, I always test afterwards, it never leaked.

Generally no, assuming that the joints of your system are glued correctly and you have SCH 40 PVC pipe and fittings. The SCH 40 pipe is rated for up to 300 PSI. Capping the one sprinkler, will not harm the system.

yes it will. you have to go all the way back to the PVC mainline that head connects to and cap it there.

Thanks for watching! Yes that should be fine. It is less safe because you have more parts after PVC pipe that can break and leak etc. But considering they will be underground undisturbed, you should be good.

@@DIYGEEKTEXAS Thank you very much for your reply. You are the best!

Pressure should equalize but GPM will change

Ignore that. Turns out a huge tree root wrapped itself around the sprinkler

@Marco Jacinto Yes after sprinkler heads removed and capped, these are just lines (pipes) filled with water. If any of the pipe leaks in the future, I can also just disconnect them from the sprinkler valve.

Not sure what you mean by Tee, if you mean those push fit connectors... I don't like those, I encountered broke and cause flooding in the past. I would go with stronger screw in method.

Or if you still want to do the Tee, apply some PVC glue (maybe?)

I assumed the feed was 1/2 pvc with a pvc tee for the riser pipe into the sprinkler?

Schedule 40

@@schutzhund3933 oh okay yes, you mean the water main for the sprinkler is 1/2-inch PVC with Tee (schedule 40) you want to terminate it there? For sure that's fine. :-)

No just schedule 40

Go to 2:50 mark

huh?