Pex Tubing

Some articles on pex:

Cross-linked Polyethylene - Uses - Benefits and Drawbacks
... Benefits of using PEX in plumbing include Flexibility ... PEX has become a contender for use in residential water plumbing because of its flexibility ... A single length of PEX pipe cannot handle a sharp 90-degree turn, however, so in those situations, it is necessary to connect two PEX pipes with a 90-degree PEX elbow joint ...