Pipes & Fittings Buying Checklist

Research Phase

PVC is the standard choice for new residential DWV work in most areas.
If noise matters (drains running through bedroom walls), consider cast iron for those specific runs.
Never mix PVC and ABS with solvent cement. Use a mechanical transition coupling.
Push-fit for repairs and tight spaces. Soldered or crimped for new full-line installations.
Always deburr pipe ends before any connection method. Burrs cause leaks.
Keep spare push-fit caps and couplings for emergency repairs.
When in doubt, size up. A 3/4 inch line costs marginally more than 1/2 inch but delivers significantly more flow.
Long runs need larger pipe. Friction loss increases with distance -- a 50-foot 1/2 inch run loses more pressure than a 10-foot run.
Home-run PEX manifold systems deliver better pressure to each fixture because each line is dedicated.
PEX is the best choice for most DIY repiping projects -- flexible, forgiving, and affordable.
Copper is worth the premium if longevity and resale value matter most.
Use push-fit fittings to transition between pipe types during repairs.