Difference between 1.5" and 2" drain in overflow

[mark]

I'm running 2-2" Dursos and drilled one vent hole in each cap matched for when first running ~2000gph. Strangely they are different sizes (5/32 and 7/32 just checked with an index) but generally overall they are small. Only about 1000gph now but holes still working, not Herbie silent but the Dursos are really really quiet.

Do remember would get the up/down and sucking in the overflow with cap and no hole, small hole would get the variation in the overflow level but no sucking and still a little noisy but once hit the right hole size, the sound just dropped off level stabilized.

Now if I see the level in the overflow moving a bit, know I have a little salt creep to clear.

[Delphinus]

It would probably make some difference. Think it's called the "double/quadruple principle", if you double the pipe diameter you get quadruple the potential flow at the same pressures. I'm not sure I'd do the jog. Sorta sucks but it might be worth getting that length of 2" pipe and see how it goes.

[findingnemo1]

Christy i'll talk to Craig tonite and see what we had on there. Cause that tank was in my living room in Sherwood park and i never heard it. And i know we did have a reducer on it as we'll.

[PoonTang]

Initally my tank was surging too and I have dual 1.5" and a dart. I wound up having to use 2 drain valves for a while to get increased flow to my sump and that would quiet it down so I would say its definately a flow issue. Go with the 2" it will be quieter and safer.

[sphelps]

Durso standpipes should be one size bigger than the drain to work properly, so if you're using 1.5" pipe for the drain, your durso standpipe should be 2". This should fix your problem.

FYI many plumbing stores will sell PVC pipe by the foot.

[christyf5]

Originally Posted by sphelps

Durso standpipes should be one size bigger than the drain to work properly, so if you're using 1.5" pipe for the drain, your durso standpipe should be 2". This should fix your problem.

FYI many plumbing stores will sell PVC pipe by the foot.

Unfortunately we don't have many plumbing stores. We have Home Hardware. Home Depot doesn't sell it (they only sell the type for irrigation, tons of holes in it) and I'm not sure about Rona, they seem more like a "I need to hang a picture, do you have nails and an apartment sized hammer?" type of store, either that or we have a mini-Rona

[sphelps]

Originally Posted by christyf5

Unfortunately we don't have many plumbing stores. We have Home Hardware. Home Depot doesn't sell it (they only sell the type for irrigation, tons of holes in it) and I'm not sure about Rona, they seem more like a "I need to hang a picture, do you have nails and an apartment sized hammer?" type of store, either that or we have a mini-Rona

Well either way you should be using a 2" standpipe to match your 1.5" drain. You could always use 2" ABS which may be easier to find in your area, it also typically comes in 4 foot lengths.

[banditpowdercoat]

Durso's will allways make some noise but ya if pipe is to small, it will make more noise.

I will never do another tank unless it's Herbie style. In fact, Combine them for 3 drains. 1 Herbie gate valved, another Durso, full open to take the excess the gate valved one doesn't and a Emergency line.

I want to change my tank now, but I can't get behind it to re-plumb my drains

[Seth81]

Originally Posted by banditpowdercoat

Durso's will allways make some noise but ya if pipe is to small, it will make more noise.

I will never do another tank unless it's Herbie style. In fact, Combine them for 3 drains. 1 Herbie gate valved, another Durso, full open to take the excess the gate valved one doesn't and a Emergency line.

I want to change my tank now, but I can't get behind it to re-plumb my drains

If you do go Herbie, just don't do what I did... see my post in DIY "Herbie design fail"

[christyf5]

Originally Posted by findingnemo1

Christy i'll talk to Craig tonite and see what we had on there. Cause that tank was in my living room in Sherwood park and i never heard it. And i know we did have a reducer on it as we'll.

You guys had 1.25" pipe on there. Its hell finding that stuff around here but oddly enough the 1.5" is pretty popular so I went with that. 2" just seemed like overkill to me but my original plans for the dart included a few elbows and PVC. I ended up switching to spaflex and reduced the elbows to just what is in the wavy sea so much more flow than I'd planned on I guess.