8/30/2023 0 Comments Siphon overflow box![]() ![]() Be sure and test the setup a few times by removing power manually before you leave it unattended to make sure everything works correctly. Now if the power goes out you do not have enough water volume to overflow the sump so no worries about flooding. You may need to lower this level to accomodate a skimmer or other filtration in your sump depending on your design but never fill your sump over this mark. Now mark the water level in your return section with a marker or piece of tape this will be your maximum fill point when you are topping off the tank with the return pump running. Now turn the return pump back on, the water level will drop in the return pump section of your sump until the DT is refilled and starts flowing through the overflow box. Once the water has stopped draining and with the pump still off fill your sump to the maximum level allowed which is governed by the height of your baffles. 6 wide 3/4 bulkhead outflow A built in overflow is the most efficient method. Once you have it started shut the return pump off and let the water finish draining from the DT it needs to stop completely before you go on to the next step which may take several minutes. Feature(s): For glass or acrylic aquariums up to 60 gal. The way you do this is to get the system running but don't fill your sump more than half full, you want to leave yourself plenty of room for water to drain back to the sump after you shut the return pump off. You don't really need to do this if you set the water level in your sump. So you need to make sure that your sump has enough room to accomodate this extra drainage. If you return outlet is below the level of the water it will siphon some water back through the return plumbing, and to keep this to a minimum you want to drill a hole in the at the surface of the water so that it will suck air into the return plumbing when power is removed from the return pump and break the siphon on the return plumbing. You will get some extra drainage as the tank level drops to the bottom of the teeth on the overflow box and some from the drain and return plumbing. You do want to make sure that you have enough room in your sump to be able to hold all of the water that will drain from the DT in the event of a power failure. If the siphon is adjusted to a flow rate that is slightly lower than what the return pump provides, then water will backup in the overflow box and be handled by the second (open channel) standpipe. The amount of water in the DT or sump will not have an effect on the siphon, the overflow box will keep the level of water in the DT the same regardless of the amount of water in the system so any evaporation will lower the water level in the sump specifically the return pump section. Incorporate a siphon into the overflow setup and back it up with an open channel standpipe. ![]()
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