Overflow Pipes to Basement

[Uncle99]

My sump is in the basement, two 1” overflows go down 5’, 45 elbow for 2 feet, then a 90 elbow, 2 more feet to the sump. Total fall is 9’.
Are there any concerns I should have in respect to the way my overflow is plumbed, ie, do the turns cause any issues with the flow?
Or is it better to plumb straight down. I have gate valves just below the two returns so I have control of what goes down.

Would appreciate any insight.

 

[Ratherbeflyen]

Are any of the runs horizontal? If so, make sure you keep at least 1/4" per foot slope down. If your drain is perfectly level, or has to go up hill, it will trap air and make tuning the overflow difficult to impossible.

Long drains with lots of corners will probably make more noise than a straight pipe, but otherwise should be fine.

 

[DSEKULA]

As long as it continues to flow down your fine.

 

[ca1ore]

It is generally a good idea to avoid any horizontal runs, though greater drop to a basement will usually generate enough pressure to overcome them. Why not use flex pvc and avoid the elbows.

 

[dbowman5]

being half serious, if you use a 45 then a 90 you are going 45 degrees into the sump logical insight yes?
if you use a 45 then 2 feet that makes it a hypotenuse so is the pipe after the 45 2 feet, or it is longer but drops 2 feet vertically? showing the 2 foot drop with a two foot piece of pipe after the 90

 

[Uncle99]

being half serious, if you use a 45 then a 90 you are going 45 degrees into the sump logical insight yes?
if you use a 45 then 2 feet that makes it a hypotenuse so is the pipe after the 45 2 feet, or it is longer but drops 2 feet vertically? showing the 2 foot drop with a two foot piece of pipe after the 90

Yup, sorry, that’s straight for 5, 45, then straight at 45 degrees, and then 45 into the sump, (no 90)

Nice drawing

 

[Uncle99]

It is generally a good idea to avoid any horizontal runs, though greater drop to a basement will usually generate enough pressure to overcome them. Why not use flex pvc and avoid the elbows.

No horizontals, straight down, then 45, then into the sump...
Flex pipe, didn’t know this was being used.

 

[Uncle99]

Are any of the runs horizontal? If so, make sure you keep at least 1/4" per foot slope down. If your drain is perfectly level, or has to go up hill, it will trap air and make tuning the overflow difficult to impossible.

Long drains with lots of corners will probably make more noise than a straight pipe, but otherwise should be fine.

No horizontal, all straight down except for 2’ on a 45 degree angle, then back straight again into the sump.

 

[dbowman5]

No horizontals, straight down, then 45, then into the sump...
Flex pipe, didn’t know this was being used.

rigid pvc is considered better than flexible, not exactly sure why, perhaps because of sagging that creates an accumulation spot for debris