Backwash plumbing

pjackovich

New member
Apr 21, 2015
2
Gaithersburg/MD
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.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,069
San Dimas, CA (LA County)
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.
 

kevinp768

Active member
Sep 30, 2018
30
Wichita KS
I used sch 40 pvc tied into my 4" DWV for my downspouts, terminating to a pop up emitter at the rear of my yard. I have clay soil and didn't want any extra moisture in my yard that I don't put there.
 

pjackovich

New member
Apr 21, 2015
2
Gaithersburg/MD
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!