Hi are living in a rental house and we just purchased a Morton 30,000 gallon water softener. The house was not plumed correctly and we had to install it at the main water source. The problem is there is NO drain nearby it is 30 feet away. We were going to run PVC pretty straight 20 feet away and through the wall the last 10 feet to the drain next to the furnace.

Question is, is this the best way? Can we do it with any type of flexible hosing? That would be cheapet than the pvc?