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Three sprinkler heads were chosen.
- Red (1, 7, 9) are VYR60 – dual nozzle sprinklers (3.6 mm, 2.4 mm) and are fed by 20mm copper pipe from the feeder pipe. Their published charcteristics are for different pressures: 180 kPa radius 16.3 15.3 lpm; for 420 kPa radius 24.6 24 lpm
- Blue (2a, 2b, 3, 4, 5,6, 10) are Pope Heavy Duty sprinkler heads which are fed by 15mm copper pipes. Their published characteristics are 10LPM at 100kPA, 18.9LPM at 350kPA; and in each case a 12.5 m max radius.
- Shed cooling sprinkler heads whilst not explicitly shown are 12mm fan sprays fed by 12mm copper pipe with 5 angled to cool the pump shed roof and walls.
The siting of sprinklers was determined by pre-planning considering their rated spray radii, followed by testing. To do this at each position a corresponding sprinkler was placed on a flexible moveable pole, and was fed by a rubber hose with tap water further presurised with a small electric centrifugal pump. The positions were then experimented with at different heights, angles and positions to achieve optimum overall coverage.
This at least gave initial confidence as to the likely capabilities of the sprinklers, their minimum area of wetting, and the heights and positions to place them. However, later even after the feeder pipe and pump were operational and the poles established, the sprinklers were still initially connected by rubber hose so that their heights could be adjusted, and only when that was finalised were they plumbed in with copper pipe.
- Sprinkler 1 with a VYR60 dual nozzle has the double job of wetting the side as well as deck front of the house. It is positioned at the steps on the W side of the house. Height of bottom of sprinkler to ground is 2 metre.
- Sprinklers 2a and 2b were used instead of a VYR60 here as it would need to be to be 3.6 m above ground and the far bedroom wall would still require supplementary spray. These two Pope sprinklers mounted at 2.2 meters do an excellent job at their minimum operating pressure of 36 PSI covering from the end bedroom to the middle living room window.
- Sprinkler 3 is a Pope, and at a height of 500 mm produces a small segment of spray to protect end of house
- Sprinkler 4 is a Pope at height of 150 mm to the keep side of house wetted including windows.
- Sprinkler 5 is a Pope which at a height of 100mm keeps shed, gas bottles, and north facing door, deck and walls wetted.
- Sprinkler 6 is a Pope which at a height of 100mm to keep north wall of shed wet.
- Srinkler 10 is a VYR60 and at a height of about 2000 mm wets the first area of roof between sprinklers 8 and 11.
- Sprinkler 9 is a Pope and, attached to the vacuum breaker post (see later) wets the clerestory windows above the W side verandah roof.
- Sprinkler 7 is a VYR60 which at the N brush fence entrance to house at a height of 1.2 metre wets the West and South of shed, North facing door, deck and walls (overlapping the spray from 5) and east deck (overlapping 1).
- Sprinklers 11 and 12 are both Pope heads mounted to wet the clerestory window sections of the E house guest bedrooms.