Hi everyone, we have 6 ducklings who are quickly outgrowing their splash pool, so we've decided to build them a simple pond that's easily drained and hosed out. To keep costs down, we're planning to use pool liner (I can get some used for free from a local pool installer). We're locating the pond on a little hill and running about 10 feet of 3-inch PVC drain pipe from the lowest point on the sidewall so it can drain out near our septic field. Putting the drain on the bottom won't work -- there won't be enough of a slope on the pipe. I'm leaning toward putting the drain valve on the furthest end of the pipe to avoid stressing/tearing the liner or causing a leak with repeated use. I'm hoping to get some advice on how to secure the pond-end of the pipe against the liner so it's watertight -- I'm pond construction challenged so any suggestions or input would be very much appreciated!!