Whole House Repipe Planning Guide

Workflow

1. 1

   Assess Existing Plumbing

   4 hours

   Map galvanized, copper, and polybutylene; count fixtures.

   Fixture Unit CountPEX vs Copper Cost

   Show tips (2)
2. 2

   Design New Layout

   1 day

   Plan home-run PEX manifold or copper trunk-and-branch.

   Pipe Sizing by Fixture CountWater Supply Line Sizing

   Show tips (2)
3. 3

   Estimate Cost and Timeline

   2 hours

   Compare PEX vs copper material and labor.

   PEX vs Copper CostWater Pressure Calculator

   Show tips (2)
4. 4

   Phase Installation Plan

   1 day

   Sequence by bathroom/kitchen; maintain water during phases.

   Hot-Water Pipe Volume and Delivery TestWater Pressure Calculator

   Show tips (2)

Tools Used

• PEX vs Copper Cost
  Primary

  Compare total repipe cost by material.

• Fixture Unit Count
  Primary

  Count fixtures for pipe sizing.

• Pipe Sizing by Fixture Count
  Supporting

  Size trunk lines for fixture load.

• Water Supply Line Sizing
  Supporting

  Size individual branch runs.

Reference Materials

• Repipe During Remodel

  Open walls anyway — repipe adds minimal incremental cost.

• Manifold Access Panel

  Build accessible panel for manifold — future shutoffs easy.

• Don't Mix Metals

  Use dielectric unions where copper meets galvanized.

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