finally went herbie!

[Harold Green]

Why would you have a 1K gph of overflow on a 29g tank? That's what I have on a 210g with a mag 18 return pump. Two durso's and they are near silent. My drains dump into a splash box that overflows into two filter socks. Normally you size the overflows to move around four or five times the tank volume per hour. That's about 150gph for a 29g tank.

 

[Cleo642]

even then its still loud. pulling a full syphon on 1, and a trickle on the other prevents the turbulence that causes the sound. even with a properly matched pump youll still get water sound as it drains unless its a perfect match at which point its going to flood eventually as buildup occurs in your pipes. tbh, this is the setup I was wanting to do from the start I just got impatient and didn't want to spend the money. theres a reason theres so many different plumbing setups: durso, herbie, beananimal etc. its all in hopes of running silent while still maintaining good flow. with the setup as it sits I barely get any bubbles in my sump from it. once I do the overflow boxes and finish tweeking it as needed itll run silent and still be able to handle a lot more flow in case of a clog in one of the pipes.

oh and my bulkheads would require 1k gph to both run 100% on full syphon to be silent and its only a 29 gallon tank lol I think my 500 gph pump is a bit much as is

A waterfall sound is soothing. Lol

 

[Dtackett]

Why would you have a 1K gph of overflow on a 29g tank? That's what I have on a 210g with a mag 18 return pump. Two durso's and they are near silent. My drains dump into a splash box that overflows into two filter socks. Normally you size the overflows to move around four or five times the tank volume per hour. That's about 150gph for a 29g tank.

my overflows are capable of 1k gph I don't push them that much. I run it like this to prevent any chance of a flood. the bulkhead with a gate valve is actually handling all of the flow from my pump and I had to slow it a bit to raise the water and keep a trickle in my second pipe. this means even in the case of a clog, in either pipe, I wont have any issues with a flood. with the head pressure and pump size I have im running around 375 gph. its a pretty good pace for my setup.

 

[eg8r210]

Since you aren't sure if the valves you mentioned exist in PVC, I'll share some links with you so you can include the proper valves in your next build.

2" PVC Ball Valve - $6.00
2" PVC Gate Valve - $42.22
2" PVC Butterfly Valve - $199.77 (Does not include mounting flanges or hardware)
2" PVC 90* Globe Valve - $274.65
2" PVC Globe Valve - $405.27 (Does not include mounting flanges or hardware)

As long as you are using the "correct" valve who cares about stupid price difference.

 

[eg8r210]

Not to try and change the direction of this interchange but wouldn't it have been easier to size the return pump properly to start with? Figure out how much flow your overflows can handle and then choose a pump with that flow at the tanks head height. You can even upsize the pump slightly and then add a tee and valve to the return to divert some flow back into the sump to match the return exactly to the overflows.

This is a great idea but there is such a small qty of people who actually know how much water their return pump is actually pumping it seems like more work than needed. Also, for those using a manifold this would be even more difficult for the average reefer to figure out.

 

[scardall]

Not to try and change the direction of this interchange but wouldn't it have been easier to size the return pump properly to start with? Figure out how much flow your overflows can handle and then choose a pump with that flow at the tanks head height. You can even upsize the pump slightly and then add a tee and valve to the return to divert some flow back into the sump to match the return exactly to the overflows.

Funny you mentioned that, because that is how I have mine. Plus I use that flow back to drive My reactors.

 

[Dtackett]

the issue with matching overflows to the return is if either have an issue, youre going to have an issue. if your pipe becomes even slightly clogged from buildup.. flood, if your return gets something in it and starts to clog, your looking at reduction in flow, and thatll allow your returns to suck air and make god awful noise. now, when its setup like mine, one pipe can get completely clogged and the other can handle the entire system. if I have a reduction in flow, my water level will drop, but id have to lose a lot of flow before it starts sucking air. either way, the changes would be easy to notice as I stare at my tank multiple times a day, every day, but not much can happen thatll cause a real issue.