There are important factors to consider when choosing and installing your pump.
A pump performance graph is a tool which enables us to see how a pump will perform in terms of head and flow. Every pump will be capable of developing a specific pressure (PSI) at a specific flow (litres per minute). For an explanation of head see this article.
Calculating the flow.
If you do not know the flow you require it is relatively simple to determine if you just take it one step at a time and add all the outlets together.
Using the figures below work out how much water you need to add up all the requirements that are likely to operate at any one time.
Eg: 1 Shower, dishwasher, washing machine, toilet all on at one time = 44 litres per minute
- Toilet = 9 litres per minute
- Standard Shower Head = 10-15 Litres per minute
- Water saving shower head =6- 7 Litres per minute
- Household Standard tap = 10-15 Litres per minute
- Dishwasher = 15 Litres per minute
- Washing Machine = 10 – 15 Litres per minute
- Garden Hose = 20 Litres per minute
- Lawn Sprinkler = 10 -15 litres per minute
Typical Domestic water usage as a guide:
- Small cottage requires 10 – 20 Litres per minute
- Small House require 20 – 30 Litres per minute
- Medium House requires 30 – 50 litre per minute
- Large House requires 50 – 90 litres per minute
This is always dependent on how many people live in the house.
What pressure will I need?
Normal domestic water pressure is between 40-70 psi. But there are other things that can affect the pressure
- What is the Height difference between the pump and the highest point of use?
- How far does the pump have to pump water too?
- What size, type and length of Pipe is being used from the Pump to the final destination (Pipe Friction Loss) etc
Contact Us today to discuss your needs.