Garden irrigation blog — guides and calculations

IrriForge blog

Guides built on manufacturers' own design rules — no marketing, with numbers you can check.

19 August 2026 · 10 min read

Winterizing an irrigation system, step by step

How to prepare an automatic irrigation system for winter: when to do it, how to blow out each zone with compressed air, at what pressure, and what to do with the valve box, filter and controller.

19 August 2026 · 9 min read

Mains water for garden irrigation: pressure and flow

How to measure pressure with a gauge and flow with a bucket test, which values sprinklers actually need, how many zones that gives you, and what to do when the mains cannot keep up.

12 July 2026 · 11 min read

How to design garden irrigation, step by step

A complete guide to designing automatic irrigation: measuring pressure and flow, splitting the garden into zones, choosing and spacing sprinklers, sizing PE pipe, and the mistakes that ruin a layout.

12 July 2026 · 8 min read

Sprinkler spacing: head-to-head coverage in practice

Why every sprinkler must throw all the way to its neighbour, how to pick 90°/180°/360° arcs, what matched precipitation rate means, and which nozzles must never share a zone.