AquaGravity
AquaGravity
Water pumps & farm equipment
Yield calculator

Pump Sizing Calculator

Find the right Bunyip Pump for your specific water transfer needs.

Calculate Your Pump Size

Enter your site conditions to see live output and pricing across all three Bunyip Pump models

Interactive calculator

Pump output estimator

Estimate 24/7 water delivery from your stream drop and delivery height.

Supply head (drop)1.5m
Vertical fall from the water intake — needs differ by model, see below
Available stream flow4L/s
Flow volume entering the drive pipe
Delivery lift height30m
Vertical height up to the tank or trough
Bunyip Pump 8
L/day
L/min continuous
Efficiency: % of supply flow pumped
Contact for price
Bunyip Pump 13
L/day
L/min continuous
Efficiency: % of supply flow pumped
Contact for price
Bunyip Pump 16
L/day
L/min continuous
Efficiency: % of supply flow pumped
Contact for price

Estimate only — we confirm every site against the published model output tables, and zero power cost either way.

Verify with our tech team →

Sizing a Castle Multistage Pump?

Enter your required flow and pressure to find the matching CDL series

Castle Pumps

CDL series finder

Find the right Castle vertical multistage series for your required flow and pressure.

m³/h
bar
CDL8 series
5-12 m³/h · up to 21 bar · 62% max efficiency
Request a quote
0.757.5 kW, pump without motor
CDL12 series
7-16 m³/h · up to 22 bar · 63% max efficiency
Request a quote
1.511 kW, pump without motor
CDL16 series
8-22 m³/h · up to 22 bar · 66% max efficiency
Request a quote
2.215 kW, pump without motor
CDL20 series
10-28 m³/h · up to 23 bar · 69% max efficiency
Request a quote
2.218.5 kW, pump without motor

Estimate only — confirm exact model and motor sizing with our technical team for your application.

Get a quote →
How it works

How the Calculator Works

1

Enter Site Data

Provide your fall height, flow rate, and delivery height

2

Get Instant Results

See daily output, system efficiency, and recommendations

3

Contact for Quote

Get a detailed quote for your recommended pump model

Ready to Get Started?

Have questions about your calculation? Our experts are ready to help you find the perfect solution.