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03/28/2008, 06:41 PM | #251 | |
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Quote:
http://www.reefcentral.com/forums/sh...&pagenumber=10
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03/28/2008, 07:35 PM | #252 |
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It is good that this idea gets recycled every few years for the new people on the boards. I've been out of the hobby for over three years and am contemplating hopping back in. I have been trying to catch up on all the new and improved ideas and ran across this thread and thought, hey, I'd been doing that for many years. Some things can't be improved on I guess. Nice thread,
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03/28/2008, 08:03 PM | #253 |
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1" or 1.5" drains for this method?
I've read this thread with great interest (ok, maybe I missed something but I tried!), as I am designing a custom about 90 gallon 30x25x25 or so reef tank. I am trying to fit 4 bulkheads (3 drains, 1 return) in as small a footprint as possible (3 sides viewable, trying to keep flat to the back center)
My question for people experienced in this field. If starting from scratch and I can choose my bulkhead size.... 1" or 1.5" for the 3 drains? Seems like the one in siphon mode can handle a lot, but if it has a problem, I need the other ones to be able to keep up. No, I don't have a pump chosen, but it seems like people recommend 500-1000 gph into the sump? (plus powerheads/closed loop/whatever also) Using 1" instead of 1.5" drains (and only 3/4" for the return) would let my overflow box be smaller. But not if it limits my flow too much for a 90g. Also, if these pipes are coming straight up, don't I only need room in my overflow box for durso-style elbows on 1 of them? The one with the small air hose coming out? Can't the "siphon" one and the emergency drain one just be open vertical pipes of appropriate heights below and above the waterline? |
03/28/2008, 10:10 PM | #254 | |
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Re: 1" or 1.5" drains for this method?
Quote:
So go bigger than you think you need because you can always reduce the pipe sizes.
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03/28/2008, 11:24 PM | #255 |
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OMG, you routed the glass yourself? That is truly inspiring.
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/29/2008, 07:30 AM | #256 |
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No, in my case it was just cheaper to have a local glass shop route it.
But it's not that difficult with the right bit and a simple guide for the router. Although I would never recommend it, I've seen guys do this freehand with a Dremel. Now that's inspiration.....(or stupidity).
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03/29/2008, 08:00 AM | #257 |
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If you go with the standpipe setup as described in this thread (and on my web page) you can easily use 1" bulkheads for 500-1000 GPH. It would certainly not hurt to step up to 1.5" bulkheads.
I would not recoemend an open top standpipe for the siphon. It will be prone to creating a vortex and sucking in air. That said, if you design the open channel standpipe to be several inches above the siphon standpipe, it will work. |
03/29/2008, 11:05 AM | #258 | |
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Re: Re: 1" or 1.5" drains for this method?
Quote:
thanks. |
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03/29/2008, 11:23 AM | #259 |
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AND WHERE DID YOU GET THOSE VALVES?
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/29/2008, 09:10 PM | #260 |
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Guy Smilie Last edited by GuySmilie; 03/29/2008 at 09:16 PM. |
03/29/2008, 09:12 PM | #261 | |
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Re: Re: Re: 1" or 1.5" drains for this method?
Quote:
Total weight of the (full of water) overflow system is <40lbs, hardware and all. The rubber/vinyl hoses are so short, vertical, flexible, and lightweight, that they cause minimal lateral stress on those beefy Sch. 80 bulkheads; which themselves are mounted to 3/8" glass. The three vertical panes of glass are 1/4". As for stress, you could stand on that overflow and the glass would break before those seams would fail. Here's the original build specs, for anyone interested. Graphic is too big for RC's forum format. (Sorry Bean, don't mean to hijack but I always get PMs for this)
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Guy Smilie Last edited by GuySmilie; 03/29/2008 at 09:18 PM. |
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03/29/2008, 10:25 PM | #262 |
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great valve supply. very nice stuff.
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/31/2008, 04:03 AM | #263 |
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bump
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03/31/2008, 11:20 AM | #264 |
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Question...
I totally get how this works for overflow to sump... but I'm assuming that trying to feed a skimmer from the siphon line either wouldn't work well with this method, or at all, or at all? Just bringing to clarity my tank build plans... funny how you get closer and start merging ideas you've collected together, how you have to check interference... A few months ago: 1. Investigate and plan to use Herbie/Bean method 2. Overflow feed skimmer to reduce pump count and skim dirtiest water Now Putting the two of them together results in the above question. Figure 600gph through the skimmer, with a total of 1,800 GPH through the overflows (it's a 400g tank) Could one run 2 siphon lines, the first throttled down to the skimmer GPH? the second siphon to the sump used to control the level/flow through the open standpipe? |
03/31/2008, 11:25 AM | #265 |
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Yes, you could run two siphons
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03/31/2008, 11:31 AM | #266 |
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but can you create a siphon in a skimmer?
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/31/2008, 12:17 PM | #267 |
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The siphon could be used to feed the skimmer, the only problem may be keeping the flow from the siphon consistent. The flow rate of the siphon will be dependent on the total head of the system. As the water level of the skimmer fluctuates, so will the volume of the siphon and of course vice-versa.
I have considered trying to feed the skimmer this way, but have yet to get around to actually doing so. |
03/31/2008, 12:36 PM | #268 |
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I am just curious because as you know I gravity feed my skimmer, but I am suspicious that the open style of a skimmer and air injection might not allow a true siphon.
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/31/2008, 01:15 PM | #269 |
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The siphon will form as long as there is there is a difference in the level between the two bodies of water AND the feed side does not allow air to be introduced.
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03/31/2008, 01:20 PM | #270 |
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OK, so in my case with open feed I am just feed by gravity and not creating a syphon. That's a good thing in my system!
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Jonathan--Recovering Tankaholic. Current Tank Info: 70g fresh planted |
03/31/2008, 05:43 PM | #271 | |
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Quote:
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03/31/2008, 07:38 PM | #272 |
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Plumb a new Tank
Bean, I got my new tank sat. I have a plan to let me use your 3 pipe silent siphon method which I am determined to try and use. Let see now, I have four holes drilled for 1" bh in the back, two on each side to use for closed loop and I'll drill two more close to the center mid level along with one for a 1.5" bh for the cl intake, I'm thinking of Ocean Motion. Then for the overflow skimmer box if I make it acrylic and in two halves one just a plate to attach to the back, the other half can make the box complete and be silicone to the back. That will allow me to drill the back for 4 1" bh and use the bh along with a little silicon to secure the inside skimmer box and the outside overflow box(acrylic also) to the tank while at the same time passing the water from skimmer to hang on the back box where the 3 siphon drain pipes will be. You'll remember one of my goals is to have as small of a inside box as possible, maybe 1.5" deep x 5" x 20". Ok, what's not good?
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03/31/2008, 08:18 PM | #273 |
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Silicon does not adhere well to acrylic. If the tank is glass, have glass cut to size to make the box. If the tank is acrylic, use weld-on (#4 I believe) to cement the boxes to the tank.
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"When I get sad, I stop being sad and be awesome instead. True Story." Current Tank Info: 29g Mixed Reef with Metal Halide |
03/31/2008, 08:48 PM | #274 |
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Thanks, I understand about the glass/acrylic silicone thing. The seal would be the rubber gaskets that come with the bh with an extra one between the outside overflow and the glass wall of tank. Just thulght of useing some silicone between the box and tank for adding some value of solid support, suction adhesion?
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03/31/2008, 09:03 PM | #275 |
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I guess I misunderstood what you're planning to do. When you started talking about 2 halves I assumed you were planning an external overflow box. But after rereading it, it sounds like you're planning 2 internal overflow boxes. Which isn't necessary, but is that what you mean by "skimmer box"?
If you are planning to silicon acrylic to the outside a glass tank, that's asking for trouble. It's not that it doesn't seal well, it's that silicon does not adhere well enough to acrylic to support any weight. You're much better off buying $10 of pre-cut glass sheets.
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"When I get sad, I stop being sad and be awesome instead. True Story." Current Tank Info: 29g Mixed Reef with Metal Halide |
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