Fascinating. Not knowing any of this stuff I buried a garden hose between the house and a manifold at the garden made of PVC pieces from Menard's. That was 15-20 years ago and still works fine. (disconnect from the house and open the drain valve on the manifold before freeze-up) Ignorance is bliss. smile


The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.