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Message
Perforated or solid drain pipe?
Posted on 1/23/24 at 2:53 pm
Posted on 1/23/24 at 2:53 pm
I need to install a drain pipe to move water out of a low spot in the yard, that is fed by slopes in 3 directions and a downspout.
I dug a trench that solves the problem completely - there's plenty of drop - but I need to put in drain tile, etc... but the run is almost 100 feet. I would MUCH rather just put in solid pipe for the bulk of the run to avoid the cost and labor of gravel/etc... but is that going to bite me in the butt later? Or do I care, if the water is moving with just a trench?
What say the drainage experts here?
I dug a trench that solves the problem completely - there's plenty of drop - but I need to put in drain tile, etc... but the run is almost 100 feet. I would MUCH rather just put in solid pipe for the bulk of the run to avoid the cost and labor of gravel/etc... but is that going to bite me in the butt later? Or do I care, if the water is moving with just a trench?
What say the drainage experts here?
1
Posted on 1/23/24 at 3:58 pm to concrete_tiger
If you can maintain a constant downhill slope with no bellies or flat spots, and you make consistent, glued pipe connections, then solid pipe is best because you'll have fewer issues with tree roots penetrating the line.
If there's any potential for flat or negative slope and those areas are outside the drip lines of all trees, than perforated solid PVC could be preferred.
Flexible black accordion pipe is the easiest to install but the worst to maintain, because the perforated wall turns as flimsy as cardboard after a few years in the ground, it's easy to accidentally cut with a shovel, you can't snake it because the metal tip will tear through that weak pipe wall, and those snap-together connections can collapse or separate with shifting ground or vehicle traffic.
If there's any potential for flat or negative slope and those areas are outside the drip lines of all trees, than perforated solid PVC could be preferred.
Flexible black accordion pipe is the easiest to install but the worst to maintain, because the perforated wall turns as flimsy as cardboard after a few years in the ground, it's easy to accidentally cut with a shovel, you can't snake it because the metal tip will tear through that weak pipe wall, and those snap-together connections can collapse or separate with shifting ground or vehicle traffic.
Posted on 1/23/24 at 4:29 pm to WB Davis
Thanks... I like your answer. Slope is easy, 1/4 per foot is not a problem.
It will be underneath sod, tree roots aren't a problem.... I did want solid pipe because corrugated seems to like to build up with debris and is harder to clean out.
With solid, I can in theory jam a hose into the basin outlet and clean this out if needed.
It will be underneath sod, tree roots aren't a problem.... I did want solid pipe because corrugated seems to like to build up with debris and is harder to clean out.
With solid, I can in theory jam a hose into the basin outlet and clean this out if needed.
Posted on 1/23/24 at 4:35 pm to concrete_tiger
quote:
Slope is easy, 1/4 per foot is not a problem.
thats 1/4" drop every 10 ft, not 1 ft
Posted on 1/23/24 at 5:25 pm to keakar
quote:
thats 1/4" drop every 10 ft, not 1 ft
Hmm… I am not sure that’s correct, but either way I’ve got the drop where the pipe will go.
Posted on 1/23/24 at 8:47 pm to concrete_tiger
Too much slope is just as bad as too little slope for a self cleaning drain pipe
Posted on 1/23/24 at 10:08 pm to keakar
quote:
quote: Slope is easy, 1/4 per foot is not a problem.
thats 1/4" drop every 10 ft, not 1 ft
I/4” per foot is a nice fall. You would lower the invert about a foot in fifty feet of piping. Two foot fall in 100 feet.
1/4” drop every 10 feet is not good.
Also I’d recommend running a minimum of a 6” pipe Too many put in 4”. It can tend to silt up and 6” pipe is over twice the volume for the same labor and not a lot more cost in materials.
This post was edited on 1/24/24 at 9:04 pm
Posted on 1/24/24 at 5:34 am to doubleb
I just went through this digging a new 500’ ditch. 1/4” per 1’ is a helluva slope. 1/4” per 10’ sounds correct. At least for an open ditch. If it’s an open ditch and you’re at 1/4” per 1’ then you’ll be fighting erosion after hard rains - most likely.
Posted on 1/24/24 at 9:03 pm to AyyyBaw
1/4” per foot is too much slop.
A small pipe I’d go 1/8”/ft.
A large pipe 1/16 / fr.
1/4 per ten foot isn’t enough. In 100 feet you’d only get 2-1/3” of fall. In 1/16”/ft you’d get about 6” of fall.
A small pipe I’d go 1/8”/ft.
A large pipe 1/16 / fr.
1/4 per ten foot isn’t enough. In 100 feet you’d only get 2-1/3” of fall. In 1/16”/ft you’d get about 6” of fall.
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