There are many different names given by many different companies to the Sump Pump Basin. The simple fact is that it is the object that holds the sump pump under your basement floor.
Specially designed holes along a few sides will allow water into the basin. This helps to remove water under the floor slab and keep the pump actively touching moist soil. It's your first line of defense against water rising from under your basement floor.
The sump pump basin is also the center of the system. All drainage pipes and tiles will be connected to this area. It is the final stop for the water before being removed through the sump pump discharge line that runs out of your home.
Things to be aware of about your sump pump basin:
1.) The total height of the basin cannot be dug further than 2 Feet under your basement floor. This is because digging further can interrupt and remove soil that supports the foundation called the Zone of Influence. Installing a basin this deep can cause water to carry with it the dirt needed in this area for support as well as to physically interrupt the soil.
2.) There should only be drain holes built into the basin on the inward facing sides of the basin. This, again, is to limit the amount of soil that gets moved from underneath your foundation. It also helps to specifically target any water seepage or build up under your basement floor that might have been causing floor cracks.
3.) The basin should have a sealed solid lid. This is a simple request, but many designs do not have this in mind. It closes off the unit, quiets the sump pump, limits the amount of water that can evaporate into your basement, and makes the unit safe to have. Having a cover keeps people from falling in, objects in your basement from falling and logging your pump, hurting children and if the pump ever has a cord issue, electrocution.
4.) There should be options to where and how to connect the drain system to the sump pump basin. This allows you to have more options on how and in what directions to pitch the drain to allow for the best water flow through the pipes.
5.) The pump stand which supports the sump pump should be built into the basin. If there is an option to get a stand installed into the basin it means 2 things: A.) They're trying to sell you something else, and B.) The basin is too deep in the first place to be installed in the foundation. Newly designed sump pump basins will have the pump stand built into the unit.
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