I'm doing some excavation near my pool and uncovered the backwash line.
Perforated 4 inch pipe was used. I need to replace it.
What is the correct type of pipe to use for backwashing?
Perforated pipe doesn't sound correct to me.
Why wouldn't you use perforated pipe? It's acting more-or-less like the leach line for a septic tank. That's what they use. I use a vinyl hose and dump the backwash on the lawn, and it soaks in. Your setup seems more solid.
I am replacing a wooden retaining wall with a stone wall. Your responses and the location of the drain pipe lead me to believe the previous owner may have meant the perforated pipe for double duty. One to backwash and another act as drainage for the retaining wall I am replacing. I think I will replace the backwash pipe with 4 " solid drain pipe instead of the perforated pipe since it does lay near the base of the wall (no sense adding leaching water to an area I'm trying to drain), and also install new perforated pipe for drainage at the base of the new wall. Thank you all!