The Western Australian Golf Club · Hand Watering Trial
Superintendent Idris Evans put a PW75 on the hose to deal with hot spots. Areas being hand watered once or twice a day went to once every one or two weeks.
Conducted by Reported by Idris Evans, Superintendent, on camera. A working observation on the course, not a controlled trial.
- LOCATION
- Perth, Western Australia
- PERIOD
- Summer, ahead of the May 2026 inline installation
- EQUIPMENT
- PW75 hose-mounted, ¾" (20mm)
Read the underlying report
Every figure on this page is traceable to the documents below. Nothing is modelled, estimated, or extrapolated.
What the trial measured
Hand watering frequency
THE STANDOUT RESULT- Affected areas had been hand watered once or twice a day through summer.
- After the PW75 went on the hose, the same areas were watered once every one to two weeks.
- Superintendent Idris Evans described the result as remarkable.
- He also described it as a great peace of mind for the club's investment in the larger inline units, which were already committed.
- This is an on-course observation reported on camera. No meter was fitted and no control area was run alongside it.
The equipment
- PW75 hose-mounted unit, ¾ inch (20mm), no installation required.
- Fitted at the supply end of the hose at this site.
- Either end works. Installation point is a matter of user preference.
- The unit was used specifically on hot spots rather than across the whole course.
“Remarkable, and a great peace of mind for the investment in the bigger units.”
Hand watering hot spots is the job nobody counts and everybody pays for. It is a person with a hose, every day, in the worst heat of the season, on the areas the irrigation system cannot reach properly.
Going from twice a day to once a fortnight on those areas is the kind of change a superintendent notices immediately, because it hands crew hours back at exactly the point in the year when there are none to spare.
It is worth being clear about what this is. Nobody metered it. There was no untreated area running beside it for comparison, and the summer it happened in was not measured against another summer. It is an experienced greenkeeper telling you what changed on his own course.
The reason it is on the site anyway is what happened next. The club committed to an 8 inch and a 10 inch unit for a multi-million dollar irrigation upgrade. That decision is the strongest thing in this story, and it is a separate page.
Trial at a glance
- SITE
- The Western Australian Golf Club, Perth, Western Australia
- EQUIPMENT
- PW75 hose-mounted vortex generator, ¾ inch (20mm)
- FITTED
- Supply end of the hose. Either end works
- SCOPE
- Hot spots and affected areas, not the whole course
- BEFORE
- Hand watering once or twice daily
- AFTER
- Hand watering once every one to two weeks
- MEASUREMENT
- None. Observed and reported by the superintendent
- CONTROL
- None. No untreated comparison area was run
- REPORTED BY
- Idris Evans, Superintendent
Findings that cut against the headline. We publish them because a grower deciding on a retrofit deserves the whole picture.
- No metering. The change in frequency is an observation, not a measured volume.
- No control area. Nothing was irrigated without the unit alongside it for comparison.
- Single season and single site, with no season-over-season comparison of weather or course conditions.
- The account was recorded on camera by President Water, which is a source of framing in what gets asked and kept.
President Water Company · presidentwater.com · The Western Australian Golf Club · Hand Watering Trial, Summer, ahead of the May 2026 inline installation