My 120g aga set up has 2x 1" bulkheads for my drains.. I ran 2 1" drains 17ft each across my ceiling in to my basement downstairs. I have plenty of fall on the drains but now im wondering if I hould have ran 1 1/4 drains or is there going to be a problem with total of over 30 ft of 1" drains per each over over flow. I Also thought about running both drains in to a 2" drain. if the 1" drains work thats fine but trying to button things up in my ceiling today.
Question about running 30ft of drain line.
- Thread starter markl
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Just want to make sure with running that long of a drain I dont get vacume lock on the drain. I have the megaflow set up but the air vent but the hole is tiny. The 1" drains work fine right under tank but will be full most of the time and not droping straight down. They are going 20 ft horizonally.I do have 12 inches of fall from start to finish in the 20ft of pipe in the celing and 5 ft above the ceiling. Just dont want to do things twice. Its a pain popping out ceiling tiles and moving insulation around. I figure if it needs to be bigger I might as wel do it now.
purplegorilla
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I have ran couple of different ways (some like yours some like others) but the best I found was to tie both 1" right as it exits the tank into a one 2" drain pipe. Not only I have less material to buy, less chance of leaking and much larger pipe. I also have a valve on the end as it enters my sump, I can adjust as much flow as needed.
your fine, just stay under 1500gph total flow through the tank. And try to slope the pipe at least 1°(or 1" for every 8 feet)
1.25" would have been better, and yes a single 2" would work as well.
Edit : if its the thin wall stuff then your fine up to 1800gph
1.25" would have been better, and yes a single 2" would work as well.
Edit : if its the thin wall stuff then your fine up to 1800gph
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1" overflow drain pipe will handle about 590 gph
2" overflow drain pipe will handle about 2350 gph
2" overflow drain pipe will handle about 2350 gph
haha or you could just have said its the area!
1" circle = .78 sq in
2" circle = 3.14 sq in
so there you have it, one 2" is almost the same as 4 1"
oh and if you do it with 1" and end up having problems, just turn one of the drains into a full syphon(no air intake on the durso, and a gate valve at the bottom) and let the other handle the rest normally. it will run quieter that way too
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I thought the main objective for having two overflows is for redundency. If one pipe was to clog for whatever reson you still have the other. If the tank is better off running the 2" drain then why didn't it just come with one large 2" drain?
