![]() The other gasket should be placed between the external box and the bulkhead nut. Herbie drain (straight pipe) in the Durso style (inverted U) is to prevent any bubbles created by water coming over the weir from going down to the sump making unwanted noise. Installation Tip - When installing the bulkhead gaskets we highly suggest placing one between the inner overflow box and the aquarium. Why do some bean animal overflow diagrams show the main drain pipe as a straight pipe with strainer and some show it with the inverted U bend. That lets you upgrade to a larger pump or tank in the future, with an added safety benefit of being able to handle additional flow if one drain gets clogged or restricted. In most cases, we will recommend using an overflow that is +1 sized for your application. Selecting the right overflow for your tank can be confusing but it is a pretty simple formula, just take the total flow produced by your return pump and select an overflow that can handle that overall flow rate, and still be able to fit inside of your aquarium. The guide helps you set the perfect water level for your aquarium and then lets you know exactly where to drill your hole(s). It is required to drill your aquarium with the Eclipse overflow but drilling is fairly simple and with the included glass drill bit and drill guide. Water can flow through the 1/4" teeth in the wet-side of the overflow, and then through the included bulkhead into the external box that holds additional bulkheads to let the water drain down into the sump. The internal/external design for the Eshopps Eclipse Overflow Boxes creates a minimalistic design inside the aquarium, extending less than 1.25" inside the aquarium. The important thing with this formula is that you determine the actual length of the weir and express it using the flow rate specified in the problem. ![]() The required flows for smaller tanks means that the open channel will be more than enough. Id always use a bean for a large tank, but usually use a herbie for smaller ones. though in most cases perhaps more conceptually superior than practically superior. They can also be expressed as million gallons per day per foot of weir. ca1ore said: The bean is unquestionably superior. The DIY project only takes a few minutes to complete and compared to HOB style overflows, the Eclipse has a fail-safe design that includes three drain bulkheads for a Herbie or Bean Animal method of plumbing. Weir overflow rates are typically expressed as gallons per minute per foot of weir. Overflow Kits - Glass-Holes.The Eclipse aquarium overflow system consists of a slim black box that is mounted inside of your tank and a clear external box that mounts outside of your tank, to transport water down to your sump with as little noise generated as possible. Ive searched the interweds, this forum and the GIANT Bean Animal thread on the other forum. On a side note the bean animal is an improvement over the herbie. I just reset up a RR 75, and plumbing the Herbie part took maybe an hour including cutting the PVC and bonding them together. In fact, pretty sure a Bean wont work on a reef ready without some ( ( perhaps major )) modifications to the overflow (s). Even with an all-in-one aquarium you may want to re-plumb it to ensure that it is quiet and reliable. Just speaking from my experiences - An Herbie is easier to do on a Reef Ready tank. We’ll cover designs, plumbing diagrams, parts, the overflow (Durso, Herbie, & Bean Animal), the return line and return pumps. Something like a, bean animal (for full siphon), herbie or similar. Reef tank plumbing is a necessity unless you purchase an all-in-one aquarium. To fix the overflow in case of power failure you need to either invest in a hang on back that has the ability to restart the siphon through the U-tube section (I don't like or trust) or drain the tank down and drill and install an internal weir that is drilled through the back wall of the tank (I do like and trust). If the pump in the sump puts out more GPH than the drain can handle it will overflow the tank. The overflow is a true coast to coast overflow and the flow entering it is low. Its basically dead silent with just a small amount of bubbles now. It was 1.5' under the waterline in the sump and I cut it to 0.75'. One of the ways to quiet it is to convert the drain on the outside of the tank to a durso, stockman or maggie muffler. So I cut the output of the full siphon entering the sump. This type of overflow makes some or a lot of noise depending on the Gallons Per Hour (GPH) draining through it. If there is not sufficient volume in your tank the water will overflow. Your hang on back overflow - when your tank loses power the siphon will break and the pump in your sump will continue to pump water into the tank until the sump runs dry.
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