SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

Thanks everyone.

I completed this job yesterday. I used a 1-1/4" x 10' PVC pipe, pulled the garden hose through it and then screwed on my adjustable sweeper nozzle. Then I taped the nozzle good to the pipe and worked it back and forth under the driveway.

why spend more money when it's not needed

I don't see any reason why you would want to constrict yourself to 3/4". If you can make a hole big enough to slide a 3/4" piece of pipe through, then you can make the hole bigger to accept a larger pipe. Just use some black pipe and black pipe fitting (along with a sledge hammer) and make the hole bigger. The bell shape of 1/2" to 3/4" with a nipple on the front of it makes for a pretty good arrow point to force through the hole. From experience, I know that a black pipe 3/4" fitting is perfect for 1" copper pipe.

Sure you can

As long as you design it properly

Quoted from "mrfixit"

Wouldn't 3/4 inch work? It'd be a lot easier to get under the driveway.

Can I reduce from 1-1/2" to 3/4" without problem? If so, I'll do that.

We just mole it over..

It's like an underground jackhammer.

What kind of soil do you have? It can make the difference between this being an easy job, and a pain in the rear job. You can review the details of the pains I went through dealing with rock-filled clay here: Tunnel Under Driveway

The thing I found to be the relatively easy way to accomplish going under something was to construct a pilot hole with a piece of rebar and sledge hammer. Then I used 3/4" black pipe tipped with a bell reducer 3/4" to 1/2" transition) tipped with a nipple. I then hammered that along the pilot hole. The pilot hole also helps if you need to use a hose or pressure washer to power through.

Wouldn't 3/4 inch work? It'd be a lot easier to get under the driveway.

I use about 4 feet of galvanized pipe attached to the nozzle then pvc there after. It keeps the pipe in a straight line. It comes out exactly where you aim it.

Good luck!

For a resi on a circle driveway. 1" is fine.

However I recommend to do a flow test on your largest consumption zone by using your water meter to get an idea of how much water the system can handle

Are you sure 3 heads will cut it?

It's best to have Head to Head coverage back to back - every sprinkler head spray touching the next spray side to side and front to back. This of course depends on the situation

Yes, concrete. Around 10' wide where I need to go under.