My house's perimeter drain system is full of water, why might that be and how do I fix it?
I had a similar recurring issue after long heavy rains. The drain pipe would fill and take a long time to drain. Turned out the dirt under the pipe where the drain hole was would turn to mud and essentially act as a seal. I ended up digging the drain end up and putting some gravel underneath. Drain pipe never stays full too long anymore.