Side-by-side comparisons

6 comparisons. Each opens with three verdict rows — best overall, best value, best for a named case — then a full matrix, then a buying checklist you can work through before the material is ordered.

Sizing and flow

1 comparisons

PEX vs copperMaterial cost, labour hours, lifespan and code acceptance for a repipe.compare

Costs and estimating

1 comparisons

Tank vs tankless water heaterInstall cost, running cost, recovery, lifespan and venting.compare

Code and permits

2 comparisons

IPC vs UPCAdoption by state and the clauses that genuinely differ on a house.compare ABS vs PVC for DWVTemperature rating, joining method, code acceptance and cost.compare

Fixtures and repairs

2 comparisons

P-trap vs S-trapSiphonage, code status and the retrofit path when you find one.compare Copper vs CPVC vs PEX for a repipeMaterial, labour, lifespan and what insurers say about each.compare

Decide once, on the numbers.

Every matrix on this site names the standard, the bore or the code section behind each row, so the decision survives being questioned.

Open the calculators