Estimate rainwater and below ground drainage — gutters, downpipes, inspection chambers, attenuation tanks, measuring pipe routes, and calculating falls.
Confirm fixture counts, pipe materials, valve sets, drainage falls and plant connections from coordinated drawing packs. Measure pipework by service, diameter and material.
Fixture schedules by area, pipework schedules by service, size and material, valve, fitting and ancillary item counts, and testing and handover deliverables listed with the estimate.
This rainwater & below ground drainage estimating guide guide is part of the Symbol Magic Pro free resource library — practical, contractor‑written advice covering Plumbing takeoffs, estimating workflows, and digital best practices for the trades.