![]() ![]() At this point there is hardly any noise because the drain isn’t drawing in any air down the pipe yet. If you could look top down into the pipe, you would still see air in the middle of it. Up to about 25% of capacity, water flows down the walls of the pipe. ![]() One shortfall of these vented drains is that they are only quiet when at the low end of their flow capacity. The bursting bubbles result in salt spray - and salt creep on the surrounding surfaces. When the water exits down in the sump, even more bubbles are created. The water and air mixture that travels through the pipe down into the sump mixes together vigorously. Hence the reason for the air vent – to prevent a siphon from forming.Īlthough the hole vent is typically very small, a considerable amount of air is drawn through it. The water in the overflow will never be constant. Unfortunately an unregulated siphon causes havoc as the pipe fills with water, then rapidly purges. These contraptions work because the air vent prevents a siphon from starting in the pipe.Īny time a drain’s opening is submerged in an overflow box by a few inches of water, it will want to go into siphon mode. the result will be a more or less quiet pipe (compared to an open drain that is). Take an open pipe, submerge the inlet opening, then vent air through the top. These are all single-pipe methods and a variation of the same idea. Vented Drains – Durso Drainpipe, Stockman Standpipe, Hofer Gurgle Buster If no standpipe is used then the water falling over the weir will fall a large distance and splash loudly. Raising the inlet of a plumbing pipe inside your overflow allows you to keep the overflow full of water. Single pipe methods are very easy to explain because not much is going on, but more complex 2 pipe and 3 pipe designs need their own longer guides. There is no way I can explain everything in detail in only one post. One thing to note - By only taking a couple paragraphs to describe each method, a lot of stuff is skipped over. This should help you choose the right method for your tank. If you can understand each component, you will see how they can work together to move a lot of water safely and quietly. While they can seem complicated, even the more complex designs can be understood if you just look at what each pipe is doing. Many people don’t know much about an overflow even if it’s on their own tank. Then you just need enough power heads to get up to 1000gph total system movement.There are many methods of Aquarium Overflows that drain water from an overflow box using standpipes. Don't increase the pipe size on a small pump such as this unless you're going to pipe it like 20 feet or something crazy. Pipe it all the way back to the tank in 1/2 inch pipe. ![]() That's something a lot of people are doing to gain a flow control advantage instead of just allowing a pump to run wide open. If it's too much, you can always build a bypass Tee into the return line down in the sump and just divert extra flow back into the skimmer compartment or refugium. A Quiet One 2000 would provide about 200gph at 4 feet head pressure. I've never used a Quiet One pump, but a lot lof people have good things to say about them. That's typical tank height off the floor and your return pump has to fight that vertical rise as well as some elbows and assorted fittings along the way. Even those would be overkill, but it doesn't hurt to over-design the plumbing for the pump you are going to use.Īssume the pump has a head pressure of 4 feet. If you just want to move 100-150gph through a sump - all you need is 3/4" drains. If I were you, I'd shoot for 1000gph flow and circulation - combined between the sump and the in-tank power heads. You'll need some powerheads to make enough water movement in the tank. So for a 55g tank you want between 550gph - 1650gph. I've seen and had LPS and softie tanks with 30X turnover. So, you want about 90 - 150gph going through your sump.īut you want at least 10x flow/circulation rate in your tank. Typical sump movement is 3x - 5x the tank volume per hour. Here is a bulk head flow chart that you can use to size it all. I always buy 1mm larger than suggested by the bulk head manufacturer. They come in every size with increments in mm. Buy the diamond coated hole saws in the correct size for the bulk heads you select. But they are cheapo as hell and they work perfectly. They are sent in tiny boxes with chinese stamps. They are from hong kong and take a week or 10 days to arrive. ![]() Richon Tools dot com is a great place to purchase hole saws for a couple bucks. FlexPVC dot com is a great place to purchase bulk heads cheap. A 1" bulk head does not fit in a 1" hole. There's a hundred videos on youtube for how to drill a glass tank.īuy your bulk heads first. ![]()
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