The foundation drain tile system has nowhere for the ground water to drain to. Once the flap is inoperable, the foundation drainage cannot discharge freely into the sanitary sewer. Over time the ‘flap’ tended to rust or become frozen and inoperable. Palmer valves often cause maintenance issues because they were made of metal. Releasing ground water into a sanitary sewer is no longer allowed, therefore the palmer valve needs to be removed and a sump pump needs to be installed to direct the water outside of the building. If you do have a sump pump, there are a few things that you can do to minimize the chance of water in your basement and keep your pump functioning efficiently and reliably.Ī palmer valve is a type of check valve that was designed to allow the groundwater collected by a building’s drain tile to be directed into the sanitary sewer system through a flap that would open as water flow or pressure increases behind it. Houses built after 1954 are required to have the foundation drains directed to a sump pump that sends the water to your lawn or to the storm sewer. If your house was built before 1954 (approximate date), your foundation drain is likely directly connected to the sanitary sewer near your floor drain through a fixture called a palmer valve.įoundation drains that are directly connected to the sanitary sewer work well and require no maintenance, but they also add a lot of clear water to the sewer which greatly increases the chances of a basement backup for you and your neighbors.
If your home was built after 1920 it likely has a network of pipes under the basement floor called foundation drains that are supposed to pick up groundwater before it can seep into your basement. FOUNDATION DRAINS What is a Foundation Drain?įoundation drains are pipes that are installed under your foundation or basement floor to collect water and move it off-site to prevent your basement from filling with water.
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