Plumbing Question

[stpauli914]

I am getting ready to plumb my 240 through the wall into the garage. As far as the drains go I was hoping to tie the (2) 1 1/2" PVC Drain lines into a single 2" PVC pipe running through the wall. My question is will a 2" pipe be able to handle the flow from the pair of 1 1/2" pipes. It is of course a gravity drain and I am running aprox. 1800GPH through the display.

Thanks in advance!

Aaron

 

[jokeefe727@aol.com]

I'm running the same set up into my garage. I run two 1" into a 3" to my sump.

 

[nitrodude]

According to online chart 2" should be able to gravity flow 3300gph. So it shouldn't be a problem.

 

[rogergolf66]

According to online chart 2" should be able to gravity flow 3300gph. So it shouldn't be a problem.

Agree I think u would be fine but use the y fitting for the connection from 1.5 to 2inc

 

[matthewduren]

Personally I'd want double the cross section area. Cross section of 1.5" pipe is about 1.76sq in. Cross section of 2" pipe is about 3.14sq in. I'd go with something at least 3.5sq in which would be a theoretical 2.1" pipe. Probably just being picky, but if the question is whether the 1.5" or 2" pipe would be your bottleneck in this scenario, imo you'll be limited by the 2" pipe.

 

[stpauli914]

According to online chart 2" should be able to gravity flow 3300gph. So it shouldn't be a problem.

That's what I was finding as well.

Thank you everyone.

 

[mattliu]

Definitely go 3" you won't have to worry about plaque build up as soon.