sal t. nutz
Member
I got my 300 today, and it has 2 overflows. However, one overflow has 2 outlets for stand pips and the other only has 1. That won't work I wouldn't think.
Strange
- Thread starter sal t. nutz
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sal t. nutz
Member
Nobody has ever seen this?
sal t. nutz
Member
Now that I think about it, I guess it doesn't matter what rate it comes out of the overflow, just what rate it goes into the overflow. Just seems strange, but the wet/dry has 3 drip tray chambers, so I guess that it is correct. But why have 3? Obviously 1 stand pipe can handle the waterflow, so what advantage is the to having 2 stand pipes in only 1 of the overflows?
new
Member
i have a cpr overflow that i bought used and the person wasnt sure on gph on it but it came off a 180gl tank figured good enough for my 75gl. did some reasearch trying to find flow rate and the next rate up from mine overall dimensions are the same just siphon is larger and has 2 bulkheads of the same dimension as my 1. maybe it is more efficent to use 2 smaller than 1 big, dont know though.
uncle fester
Member
Is it possible the 2nd "outlet" in one overflow is for water return?
sal t. nutz
Member
Not really, because it is just a funnel style bulkhead. Not threaded or even compression, so no tubes could be run from it.
mississippimud
New Member
This is just a guess - 1 to pipe into a sump, 1 to pipe into a protien skimmer, and 1 to a refugium.
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sal t. nutz
Member
No, the wet/dry has 3 inputs, they all go to the wet/dry
mississippimud
New Member
If you knew they all went to the wet/dry, why did you ask this question?
sal t. nutz
Member
The question wasn't what they were for. The question was, will this work properly? I mean, it would seem that 1 overflow would always be empty and the other might not be able to keep up. I obviously have to set the flow to accomidate the sigle hole overflow, whatever it can handle, so why even have 2 in the other one? By the way, does anyone know the flow rate for a 1" bulkhead?
broomer5
Active Member
If all three overflows are at the exacty same height, then it doesn't really matter.
Each will take it's share of the water being pumped up to the tank.
No real need to try and figure out what the one will do compared to the other two.
If they are not all at the same height, then the lowest overflow in the tank will take the lions share of the flow, and if return pump overpowers it - it will be flooded, until the water in display tank rises up to the other two.
All depends on each one's height, in relation to each other and the display tank square inch area.
I assume this tank/sump/system all came as a package, and the maker just used 3 overflows to feed the 3 fittings/chambers on the wet/dry - makes plumbing a little easier. Plus each trickle plate can only handle so much water flow, before it itself will overflow. Holes in the drip plate can only handle so much water dripping/falling through them.
Plus having three seperate overflows will allow you to use a pretty good size return pump - necessary in many cases with a 300 gallon tank. It gives you a lot of flexibility if you're going FO or reef - with regards to flow rate, biofilter turnover and total water circulation.
You could use one of them for return, do a little plumbing underneath, but I'd stick to what they've designed.
Normally they design for a "rated" flowrate.
This is what you need to find out from the manufacturer to be safe and gain the most out of the system.
Sounds awesome no matter what
Each will take it's share of the water being pumped up to the tank.
No real need to try and figure out what the one will do compared to the other two.
If they are not all at the same height, then the lowest overflow in the tank will take the lions share of the flow, and if return pump overpowers it - it will be flooded, until the water in display tank rises up to the other two.
All depends on each one's height, in relation to each other and the display tank square inch area.
I assume this tank/sump/system all came as a package, and the maker just used 3 overflows to feed the 3 fittings/chambers on the wet/dry - makes plumbing a little easier. Plus each trickle plate can only handle so much water flow, before it itself will overflow. Holes in the drip plate can only handle so much water dripping/falling through them.
Plus having three seperate overflows will allow you to use a pretty good size return pump - necessary in many cases with a 300 gallon tank. It gives you a lot of flexibility if you're going FO or reef - with regards to flow rate, biofilter turnover and total water circulation.
You could use one of them for return, do a little plumbing underneath, but I'd stick to what they've designed.
Normally they design for a "rated" flowrate.
This is what you need to find out from the manufacturer to be safe and gain the most out of the system.
Sounds awesome no matter what
sal t. nutz
Member
Broomer,
The prob is, it only has 2 overflows. There is just 2 bulkhead drains (and yes, they are both drains) in one of them and only 1 bulkhead drain in the other. So you see, as water pours into the overflows, one of the overflows will empty faster than the other since it has 2 holes. The other overflow only has 1 hole, and will empty slower.
The prob is, it only has 2 overflows. There is just 2 bulkhead drains (and yes, they are both drains) in one of them and only 1 bulkhead drain in the other. So you see, as water pours into the overflows, one of the overflows will empty faster than the other since it has 2 holes. The other overflow only has 1 hole, and will empty slower.
melbournefl
Member
Well since I'm currently going through the plumbing phase let me toss out some thoughts if I may. Logic dictates that the amount of water being returned is a function of the return pump. Now if both overflow boxes are the same height then the water should go to them both fairly equally (currents and wavemakers aside.) Assuming 1 standpipe could handle the full volume of return water (big assumption) then the other 2 standpipes could act as "back-ups" in case one should "plug" for any reason. Also by having 3 standpipes you could pre-filter each pipe (thus cutting back flow) and still return the same amount of water to the sump. On the other hand, it could be that some guy at the tank factory just get's a kick outta drilling holes! In any case, I don't think it should be any problem if you plumb each to return to the sump. You could even cross-connect the 3 to a single LARGE diameter pipe returning to the sump.
Just my thoughts, probably meaningless,
Paul
Just my thoughts, probably meaningless,
Paul