I have to replace about 20 feet of 1-inch black poly pipe between the house and the five-zone manifold. About six feet of the pipe passes under a paver brick walkway, which I don't want to disturb. The pipe is about 6-8" below the soil, in Central New Jersey.
The first sprinkler company I called said the walkway must be disturbed, and it would be up to me to make arrangements to remove and restore the pavers. If I tackled that job myself, then I could easily replace the pipe as well.
The second company said he would simply pass a 3/4" section of pipe through the existing 1" pipe under the walkway, then use adapters to transition back to 1 inch. (I don't know if meant to make the entire run
3/4" or just the part passing under the walkway. He's looking over the job tomorrow.)I asked about the reduced flow available through the 3/4" pipe. He said that as long as I don't have more than five sprinkler heads on a zone, I would be okay. My heads are by Hunter and there are only five per zone, so it sounds okay.
Any other suggestions for not disturbing the walkway, or comments on using 3/4" pipe?
Thanks,
Ray