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View Full Version : 2 - 1" into 1 - 1.5"?


klasiksb
06/11/2009, 09:01 AM
Can I run 2 1" drains into a 1.5" drain without issue? Should only be running about 600gph through it.

uncleof6
06/11/2009, 10:19 AM
Well if that is what you want to do, a 1.5" pipe has 1.77 sq in area, and the two 1" together have 1.57 sq in so the flow will not be backed up. I have not combined drains into one, so am not sure of any issues with it.

Jim

kgross
06/11/2009, 11:49 AM
That should work fine depending on how you connect them together, but remember if there is anything on the end of that 1.5 inch drain that can clog up it will clog up both drains not just one.

Kim

therealfatman
06/11/2009, 01:14 PM
A true wye fitting and a bit of flexible PVC hose and it should flow quite well. Nice smooth transition with verty little turbulence and therefore little noise being caused.

The true Wye fitting is usuually not readily had from places like Lowe's and Home Depot but are availlbale quickly from flexpvc.

http://www.flexpvc.com/cart/agora.cgi?product=PVC-Wyes_TrueWye

Poseidon
06/11/2009, 05:04 PM
Those true Wye's are neat!

I used a regular T to combine the 2 1" drains on my CPR overflow into a single 1.5" to run into my basement sump and it works great. I am also moving about 5-600GPH into the sump.

scoobster
06/12/2009, 07:45 AM
That place ( flexpvc) has the coolest stuff. makes any project super easy. :D