Most basement finishes include at least a bathroom install and sometimes a wet bar or kitchen. Hopefully it was planned for when the house was originally constructed. If not there are still ways to have tubs, toilets and sinks drain in the basement. This article will cover most of the situations encountered when getting ready to install plumbing in a basement and help directing you to find out how to install basement plumbing drains.
Having an existing drain that drains by gravity to the street is the best situation. If the original builder planned ahead and installed a drain for the tub and toilet then you are in luck. It is just a matter of finding the tub drain, getting the toilet drain ready to install a toilet on it and connecting the sink drain.
If there is plumbing installed below the concrete slab but the drains do not come up where you need them then it is often possible to cut the slab and connect new drains to the existing ones.
Installing a sewer garbage pump allows plumbing to be installed in a basement when the main sewer drain from your house to the street is above the basement floor level.
A garbage pump needs to be below the level of the drains in the basement so the tub, toilet and sink can drain to it. Once the waste makes it to the pump the pump will automatically turn on and push the waste up to the level of the drains for the upper floor where they will connect with the houses drain system and flow out to the city system.
For a sink only installation you can put the pump under the sink. To install a sump for a tub or toilet you will need to either put the tub and toilet on a pedestal so they can drain into the pump or you will need to cut a hole in the cement and dig a hole in the dirt that the pump can rest in. To install the pump in the hole you place it in the hole, fill around it with gravel and then patch the concrete around the top.