![]() ![]() You may be able to get away with greater rates by using a lot of flow conditioning methods, but that doesn’t work in all conditions. If it’s greater than 500 gpm, the size requirements for the box will get too large for practical use, and not following the size requirements leads to inaccurate measurements at best. Remember, if the flow is lower than 10 gpm, you’re not going to get very precise readings. If your flow is outside of 10 gpm to 500 gpm, you may have better luck with a flume rather than a weir box. ![]() Understanding the limitations of weir boxes is to know whether they’re even applicable to your flow conditions. Anything outside that range, however, and accuracy is often diminished fairly quickly. It typically functions best for flows between 10 gpm and 500 gpm, offering precise accuracy. Put simply, it’s a device that uses a weir plate to measure the rate of flow in a channel. The basics of the weir box are fairly straightforward. Here’s everything you need to know about weir boxes. That’s just the beginning, however, as there’s much more that goes into these systems. Typically, they’re used to measure flows that range anywhere from 10 to 500 gallons per minute (gpm). They function by incorporating a weir plate to measure flow while the box keeps the overall channel controlled with the proper conditions. Don't settle for the competition, our overflows are the most professionally made units available and we only use the best materials!!ĭon't see the size you need? We can build custom overflows, just send us a message for a quote.Weir boxes are one of the most popular solutions for flow measurement needs. This two part overflow box system also comes with three lids, a drilling template, a 3" glass hole saw, three 2" bulkheads (with nuts), two 2" bulkhead gaskets (to go between tank and exterior plumbing box), three 1.5" bulkheads (with nuts and gaskets), and installation instructions. Outside plumbing box- 26" x 4.25" x 8.25" tall Inside skimmer box- 48" x 1.375" x 5.5" tall All the other designs on the market have an exterior box that is mounted well below the skimmer box so if you shut the drain valves the exterior box will overflow. This is because our exterior plumbing box mounts at the same height as the skimmer box. One main advantage of our design that no other overflow has is if you close your drain valves our exterior box will not overflow. (We can customize the bulkhead and drain sizes/quantity to fit your application) Attaches through tank with three 2" bulkheads 3/8" thick cast acrylic mounting wall on exterior box Countersunk lids made from poly-carbonate for both boxes Fits on aquariums with up to 1.5" wall thickness Recommended for aquariums up to 1000 gal Bent front corners on both boxes (no seams) 1/4" poly-carbonate lids will never bow or warp Made entirely out of 1/4" and 3/8" cell cast acrylic (highest quality) Professionally fabricated from CNC machined parts Rear box has new notched design to fit over trim so both boxes are Works with rimless, eurobrace, and standard trim aquariums This design keeps water line hidden behind trim Slimmest and shortest skimmer box on the market! (photos show our previous model which does not have the 360 deg teeth) New 360 degree overflow teeth doubles the surface skimming and flow capacity. Entire skimmer box pulls off for easy cleaning! ![]()
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