in most cases. Direct routing of pipes. Since PEX tubing does not require elbow joints in most cases, it is often possible to run a supply line directly from a distribution point to an outlet fixture without any splices or connections in the line. This eliminates the potential structural weakness or cost associated with joints and reduces the drop in pressure due to turbulence induced at transitions. Less pressure drop due to turbulence. Since PEX pipe lines typically have fewer sharp turns and splices than lines constructed from rigid tube materials, less pressure loss can be expected between the distribution point and outlet fixtures. Lesser pressure drop translates to extra water pressure at sinks, showers, and toilets for a given supply pressure. Conversely, PEX may allow for a weaker (and less expensive) pump than alternative piping to achieve the equivalent pressure at the outlet fixtures. Lower materials cost. Cost of materials for PEX tubing is approximately 25% of alternatives. By contrast, the inflation-adjusted price of copper more than quadrupled in the two decades between 2002 and 2022. Easier installation. Installing PEX is much less labor-intensive than copper or PVC pipes, since there is no need to solder or glue pipes together. One home inspector wrote that "Once you've worked with PEX, you'll never go back to that other stinky glue stuff." Builders installing radiant heating systems found that PEX pipes "made installation easy and operation problem-free". PEX connections can be made by pushing two matching parts together using a compression fitting, or by using an adjustable wrench or a special crimping tool. Generally, fewer connections and fittings are needed in a PEX installation. Non-corrosive. Unlike copper, PEX is not subject to corrosion when exposed to minerals or moisture. No fire risk during installation. The oldest and most common method for joining copper piping is to solder pieces together using a torch. PEX eliminates the risk associated with this open flame. Ability to merge new PEX with existing copper and PVC systems. Fittings that allow installers to join a copper pipe on one end with a PEX line at the other are widely available. These couplings allow the installer to reduce or expand the diameter of the pipes at the transition to PEX if desired. Longevity. The advantageous properties of PEX also make it a candidate for progressive replacement of metal and thermoplastic pipes, especially in long-life applications, because the expected