Wildfire Sprinkler System Designer

1. Where does your water come from?

Start here. The property diagram is empty until you choose a source.

⌂Household waterOutdoor tap or municipal supply≈Lake, pond or tankChoose a portable pump model?Help me choose a pumpStart with lake distance, elevation and sprinklers

2. Measure the hose route

Measure from the pump or water source to the first point at the house. Then choose a closed loop or a straight dead-end run.

Source to house start (ft)Pump-to-manifold supply line typeSingle-jacket forestry lay-flat fire hose (standard)Hard plastic pressure line (PVC/HDPE)Fire hose uses the U.S. Forest Service forestry-hose chart. Plastic pipe uses Hazen-Williams with C = 150.Actual supply-line inside diameter (in.)Standard fire hose: 1.50 in. · Custom comparison: 1.00 in. For plastic line, enter the measured or manufacturer-listed clear inside diameter.Elevation rise to house ground (ft)Ground to roof peak (ft)

Closed loop around houseStraight dead-end run

Distance around house loop (ft)

Rooftop Water WingersSmall ground sprinklersMedium ground sprinklersLarge 3/4 in. ground sprinklers31 in. tall ground sprinklers

Calculate hose and sprinkler suggestions

4. Adjust the suggested sprinklers

Tap a product picture, then use the simple number boxes below to say how many you want to run.

Water Winger rooftop sprinklerStock rooftop protectionSmall ground sprinkler4 US GPM at 50 PSIRain Bird ground sprinkler5 US GPM at 50 PSILarge 3/4 in. ground sprinklerAdjustable Rain Bird nozzles31 in. tall ground sprinklerHeavy-duty step spikes · adjustable Rain Bird

5. Choose the hose

Choose hose:3/4 in. hose1-1/2 in. hose

6. Add branch fittings

Choose how the main hose connects to sprinkler branches.

Blue 3/4 in. High-Flow Loop TAdd one at a 50 ft hose connection for each sprinkler branch. Use an inside T for rooftop sprinklers and an outside T for ground sprinklers.—Direct connectionNo branch splitTee branch fittingSplit to two directionsMulti-branch fittingFeed several branches

Nozzle guidanceChecking the selected system…

Reset example

Planning estimate—not an engineered design. Water Winger demand and throw radius are calculated from the Rain Bird 30H/30WH nozzle chart. The stock 3/16 in. main with 3/32 in. spreader uses 9.0 GPM at 50 PSI. Removing the spreader and installing the included plug reduces charted flow to 7.2 GPM at 50 PSI. Ground choices are: small at 4 GPM with 39 ft throw, 1/2 in. Rain Bird at 5 GPM with 41 ft throw, large 3/4 in. Rain Bird, and the 31 in. tall heavy-duty Rain Bird using the selected Rain Bird main and spreader nozzles. Values are at 50 PSI. The simulator uses manufacturer pump points, source-appropriate friction data and a conservative closed-loop calculation. Pump mode uses the selected pump-to-manifold material and actual inside diameter (1-1/2 in. single-jacket forestry lay-flat hose is the standard recommendation); Home water supply mode uses a 3/4 in. line and the user-entered flowing PSI and available US GPM. Fire-hose mode uses the U.S. Forest Service wildland-hose chart: a 1 in. line loses about 10 PSI per 100 ft at 20 GPM, 40 PSI at 40 GPM and 63 PSI at 50 GPM. Hard-plastic mode uses the Hazen-Williams pressure-pipe equation with a conservative C-factor of 150, as recommended for PVC and HDPE. Closed-loop mode splits flow in both directions; dead-end mode sends full flow through the full run. Demand is assumed equal among like sprinklers. Actual performance changes with fittings, suction lift, hose condition, nozzle choice and pump condition. Always flow-test the installed system.