Step 5: Install outer barrel.
Cut off the bottom of the 50-gallon barrel so it open on both ends. Cut a 2'' hole near the top to receive a short (2-3 feet) length of PVC pipe. If installing a drain, also cut a 2'' hole near the bottom to receive the drainage pipe. Seal around the hole(s) with silicon caulking to avoid water leakeage. Backfill the drainage trench at this time. Plug in the STS-2 power cable (orange) and pass it through the upper PVC pipe.