What size water meter do I need for my commercial irrigation system?

Jan 19, 2024 | Commercial Landscapes

Many factors will affect the size you choose for your water meter. Sometimes during the quoting or planning stage, we have to decide on the water meter size before we know all of the details about available pressures and flows available onsite. These are our considerations when choosing a meter size:

Water Window

How many hours per day are you willing to water? We try to ensure that each of the irrigation systems we design can effectively deliver 35mm of water across the irrigated area over 7 days, watering a maximum of 8 hours per day(or night). This is a little bit overkill, but ensures that we have enough water during the plant and turf establishment period.

General Calculations and allowances

We can often assume that we will achieve the following flows to feed spray irrigation systems through water meters

At these flows, we assume we can achieve the required working pressure for spray irrigation

  • 20mm water meter we can achieve 20LPM
  • 25mm water meter we can achieve 55LPM
  • 32mm water meter we can achieve 75LPM
  • 40mm water meter we can achieve 100LPM

*Pressures and flows vary greatly from site to site, These are general calculations we use for estimating purposes, sometimes pressure boosting is required and on occasion we can achieve more flow through a meter than assumed above

Water meter sizing compared to irrigated area

When estimating, we assume that the following size water meters will be adequate for the

  • 20mm < 2194m2 irrigated area
  • 25mm <5280m2 irrigated area
  • 32mm <7200m2 irrigated area
  • 40mm <9920m2 irrigated area

Just a reminder that these calculations are general and are useful for preliminary planning and estimation purposes. A specific site evaluation should always be carried out to determine the actual water meter size requirement.

If you need help with sizing your water meter, give us a call!

Need more information?

Call Ecostream Now!

(03) 8765 2318

Get a Quick Quote

8 Things Every Landscape Architect Should Know About Irrigation

8 Things Every Landscape Architect Should Know About Irrigation

We can't get high levels of distribution uniformity (DU) using sprays when lawns and gardens are designed in odd shapes.  Distribution uniformity refers to the evenness and consistency of water distribution across the irrigated area. As irrigation designers, using...

3 Ways to Irrigate a New Multi-Level Apartment Complex

3 Ways to Irrigate a New Multi-Level Apartment Complex

Irrigating landscaped areas in new multi-level apartment complexes has unique challenges when controlling and automating the irrigation system.   The first challenge is often to delineate between titled and common areas throughout the building/buildings. Do you want...

What Tools Does An Irrigation Installer Use?

What Tools Does An Irrigation Installer Use?

What tools does an irrigation installer use? The tools to install a DIY irrigation system are available from most good hardware stores . But as projects get more complex we may use specialist tools that are more expensive and more difficult to find. At Ecostream we...