Pressure Pumps: How to Choose the Right Pump for Home Water Pressure, Tanks and Boosting

Pressure pumps are used to improve or manage water flow and pressure for homes, rainwater tanks, gardens, irrigation systems and selected pressure boosting setups. The right pump depends on the water source, required flow rate, pressure requirement, pipework, suction lift, tank position, electrical supply and what the pump is expected to do.

A pressure pump should not be chosen by brand, price or maximum flow rate alone. A pump that is too small may struggle to supply the outlets you need. A pump that is too large may cycle, create pressure issues or cost more than necessary. For low mains pressure, the cause should be diagnosed before adding a booster pump.

Installed Today makes it easy to compare and order household water pumps, rain water pumps and mains water pressure boosting pumps online. Products are available for supply-only ordering, with installation suitability to be confirmed before purchase.

Quick Answer: What Does a Pressure Pump Do?

A pressure pump helps move water and deliver usable pressure to taps, fixtures, irrigation systems or household water lines.

As a general guide:

• Household pressure pumps can help supply water from tanks or private sources to fixtures

• Rainwater pressure pumps can move tank water to gardens, toilets, laundries or selected household outlets

• Mains pressure boosting pumps may help where low pressure has been properly diagnosed

• Self-priming pumps can suit some tank and suction applications

• Variable speed pumps can help maintain more consistent pressure where demand changes

• Submersible pumps may suit selected applications where the pump sits in water

• Pump flow rate should be checked in L/min

• Pump pressure should be checked in kPa

• Electrical supply and installation location must be confirmed before ordering

Before buying a pressure pump, confirm the correct model, water source, flow rate, pressure requirement, pipework, suction conditions, electrical supply and installation setup with a suitably qualified installer.

What Is a Pressure Pump?

A pressure pump is a water pump designed to move water and provide pressure. It may be used to deliver water from a tank, improve pressure to outlets, supply irrigation or support a household water system where the water source and pipework suit.

Pressure pumps are commonly used for:

• Rainwater tanks

• Household water supply

• Garden taps

• Irrigation

• Toilet and laundry rainwater reuse

• Clean water transfer

• Small acreage water systems

• Sheds and granny flats

• Mains pressure boosting, where appropriate

Different pressure pumps are designed for different applications. A rainwater tank pump, household pump and mains booster pump may all increase pressure, but they are not automatically interchangeable.

Main Types of Pressure Pumps

The main pressure pump types include:

• Household pressure pumps

• Rainwater pressure pumps

• Mains pressure boosting pumps

• Self-priming pressure pumps

• Variable speed pressure pumps

• Submersible pumps

• Multistage pressure pumps

• Jet pressure pumps

The right choice depends on the source water, pressure needed and how the pump will be used.

Household Pressure Pumps

Household water pumps are used to move and pressurise clean water for domestic use. They may suit tank-fed homes, rural properties, sheds, cabins, granny flats or secondary buildings where water needs to be delivered to fixtures.

Household pressure pumps may suit:

• Tank-fed household supply

• Domestic clean water transfer

• Rainwater supply to selected fixtures

• Rural home water supply

• Small acreage properties

• Sheds and granny flats

• General household pressure support where the source suits

Before choosing a household pressure pump, check:

• Required flow rate in L/min

• Required pressure in kPa

• Number of outlets

• Peak demand

• Suction lift

• Pipe length

• Pipe diameter

• Tank location

• Water quality

• Electrical supply

• Whether dry-run protection is needed

• Whether a pressure controller is included

A household pump should be selected around real demand, not just the biggest advertised flow rate.

Rainwater Pressure Pumps

Rain water pumps are designed to move water from rainwater tanks to where it is needed.

Rainwater pressure pumps may suit:

• Garden taps

• Hose use

• Irrigation

• Toilet supply

• Laundry supply

• Outdoor cleaning

• Tank-to-house water delivery

• Selected household fixtures

Before choosing a rainwater pressure pump, consider:

• Tank size

• Tank outlet size

• Distance from tank to pump

• Distance from pump to fixtures

• Height difference

• Required flow in L/min

• Required pressure in kPa

• Pipework condition

• Water quality

• Sediment risk

• Weather exposure

• Electrical supply

• Noise placement

Rainwater pumps should be protected from debris, running dry and unsuitable weather exposure.

Mains Water Pressure Boosting Pumps

Mains water pressure boosting pumps may help improve water pressure in some homes, but they should only be considered after the cause of low pressure has been checked.

Low pressure may be caused by:

• Low incoming mains pressure

• Undersized pipework

• Old or restricted pipes

• Partially closed valves

• Faulty pressure limiting valves

• Blocked filters or strainers

• Long pipe runs

• Height difference

• High simultaneous water demand

• Plumbing restrictions

• Fixture or mixer issues

A pressure boosting pump may not solve the problem if the issue is pipe sizing, valve restrictions, blocked filters or poor fixture flow.

Before choosing a mains booster, confirm:

• Existing static pressure in kPa

• Existing flow rate in L/min

• Required boosted pressure

• Maximum safe pressure

• Pipework size

• Valve condition

• Local requirements

• Electrical supply

• Whether a break tank is required

• Whether the selected pump is suitable for mains boosting

Do not add a booster pump before diagnosing the pressure issue.

Self-Priming Pressure Pumps

Self-priming pressure pumps are designed to help draw water from a suitable source and maintain operation after initial priming, depending on the model and setup.

Self-priming pumps may suit:

• Rainwater tanks

• Garden watering

• Clean water transfer

• Shallow suction applications

• Some household pressure setups

• Some irrigation applications

Before choosing a self-priming pump, check:

• Suction lift

• Distance to water source

• Pipe size

• Priming requirements

• Water quality

• Required flow in L/min

• Required pressure in kPa

• Installation height

• Whether the pump has dry-run protection

Self-priming does not mean the pump can handle any suction condition. Poor pipework, excessive lift or air leaks can still cause problems.

Variable Speed Pressure Pumps

Variable speed pressure pumps adjust pump speed to suit water demand. This can help maintain more consistent pressure where water use changes throughout the day.

Variable speed pumps may suit:

• Homes with changing water demand

• Multi-outlet water supply

• Larger homes

• Some pressure boosting setups

• Applications where stable pressure is important

• Some commercial or rural setups

Potential benefits can include:

• Smoother pressure delivery

• Reduced pressure fluctuation

• Better matching of pump output to demand

• Lower energy use in some applications

• Reduced cycling compared with some fixed-speed setups

Before choosing a variable speed pump, confirm:

• Required pressure in kPa

• Required flow in L/min

• Number of outlets

• Electrical supply

• Installation environment

• Controller suitability

• Maintenance requirements

• Whether the added cost is justified

Variable speed technology can be useful, but the pump still needs correct sizing and installation.

Submersible Pressure Pumps

Submersible pumps are designed to operate while submerged in water. They may suit selected tank, bore or water extraction applications depending on the pump type and water quality.

Submersible pumps may suit:

• Underground tanks

• Some rainwater tank setups

• Bore applications where suitable

• Water transfer from a submerged source

• Selected pressure supply setups

Before choosing a submersible pump, check:

• Water source

• Pump depth

• Required flow in L/min

• Required pressure in kPa

• Electrical cable requirements

• Water quality

• Sediment risk

• Float switch requirements

• Access for maintenance

• Whether the pump suits potable or non-potable use

Submersible pumps should be selected carefully because access and maintenance can be more involved than above-ground pumps.

Multistage Pressure Pumps

Multistage pressure pumps use multiple impellers to build pressure. They can be useful where higher pressure is needed with efficient water delivery.

Multistage pumps may suit:

• Larger homes

• Long pipe runs

• Pressure boosting

• Irrigation

• Higher-pressure applications

• Multi-outlet use

• Some rural or commercial applications

Before choosing a multistage pressure pump, check:

• Required pressure in kPa

• Required flow in L/min

• Pipe length

• Pipe diameter

• Vertical lift

• Number of outlets

• Water source

• Controller type

• Duty requirements

• Electrical supply

A multistage pump can be a good option where pressure demand is higher, but oversizing can still cause problems.

Jet Pressure Pumps

Jet pressure pumps are commonly used for clean water movement and pressure applications where the water source and suction conditions suit.

Jet pumps may suit:

• Rainwater tanks

• Garden taps

• Shallow suction applications

• Small household supply

• Clean water transfer

• General pressure supply

Before choosing a jet pump, confirm:

• Suction lift

• Pump location

• Pipe length

• Pipe diameter

• Water quality

• Required flow in L/min

• Required pressure in kPa

• Priming requirements

• Electrical supply

Jet pumps can be practical, but air leaks, long suction lines or poor pipe sizing can affect performance.

Pressure Pump Flow Rate: Why L/min Matters

Flow rate tells you how much water the pressure pump can move. It is usually shown in litres per minute.

Flow rate matters for:

• Number of taps

• Showers

• Garden hoses

• Irrigation zones

• Toilets and laundry

• Whole-house use

• Transfer speed

• Multiple outlets running together

Do not choose based only on the maximum flow rate. Real-world flow changes depending on pressure, pipe size, distance, height, fittings, water source and pump curve.

Pressure Pump Pressure: Why kPa Matters

Pressure tells you how strongly the pump can deliver water. It is usually measured in kPa.

Pressure matters for:

• Shower performance

• Tap performance

• Sprinkler operation

• Multi-storey homes

• Longer pipe runs

• Pressure boosting

• Appliance requirements

• Irrigation performance

Too little pressure can mean weak water flow. Too much pressure can create plumbing stress, valve issues or fixture problems. The pump pressure should suit the system.

Pump Curves and Real-World Performance

A pump’s advertised maximum flow and maximum head are not usually achieved at the same time. As pressure increases, available flow usually drops.

A pump curve helps show:

• Flow at different pressure points

• Pressure capability

• Expected operating range

• Whether the pump suits the application

• Whether it can handle pipe distance and height

• Whether it can supply enough water at the required pressure

Your installer or pump supplier can help interpret the pump curve for your setup.

Pressure Tanks

Some pressure pump systems use a pressure tank to help reduce pump cycling and smooth water delivery.

A pressure tank may help:

• Reduce frequent pump starts

• Smooth pressure fluctuations

• Support small water draws

• Reduce wear in some systems

• Improve system stability

Pressure tanks need correct sizing, pre-charge and installation. A tank that is too small, incorrectly charged or unsuitable for the system may not solve cycling issues.

Pump Controllers and Pressure Switches

Many pressure pumps use a controller or pressure switch to start and stop automatically.

A controller may help with:

• Automatic start and stop

• Pressure control

• Dry-run protection on some models

• Restart functions

• Smoother operation

• Run-dry warning

• Basic pump protection

Before choosing a pressure pump, check whether it includes:

• Pressure controller

• Pressure switch

• Dry-run protection

• Thermal protection

• Restart function

• Suitable controller for the application

The controller should match the intended use, water source and pressure requirement.

Motor Size and Electrical Requirements

Motor specifications matter because the pump needs to suit both the application and the electrical supply.

Before ordering, confirm:

• Voltage requirements

• Motor size

• Power point location

• Weather protection

• Electrical safety requirements

• Cable route

• Switch location

• Whether a licensed electrician is needed

• Whether the pump is outdoors

• Whether the controller needs protection from weather

Do not run pumps from unsafe extension leads or unprotected outdoor power points.

Suction Lift and Pump Location

Suction lift is the height and difficulty involved in pulling water from the source into the pump.

It matters when water is drawn from:

• Rainwater tanks

• Underground tanks

• Lower storage vessels

• Water sources below pump level

• Long suction lines

Poor suction setup can cause:

• Loss of prime

• Pump not delivering water

• Air in lines

• Cavitation

• Poor pressure

• Pump cycling

• Premature wear

Pump location, pipe size and suction distance should be checked before choosing a model.

Pipe Size and Distance

Pipework affects pressure pump performance. Even a good pump can perform poorly with undersized, restricted or badly routed pipework.

Important pipework checks include:

• Pipe diameter

• Pipe length

• Number of bends

• Height difference

• Valve restrictions

• Filter restrictions

• Suction pipe condition

• Delivery pipe condition

• Distance to fixtures

• Distance to irrigation zones

Long or narrow pipe runs can reduce flow and pressure.

Clean Water vs Dirty Water

Many pressure pumps are designed for clean water. They should not be assumed suitable for dirty water, stormwater, sewage, sludge or heavy debris unless the model is specifically rated for that use.

Clean water pressure pumps may suit:

• Rainwater tanks

• Household supply

• Garden taps

• Pressure boosting

• Clear water transfer

Dirty water or drainage pumps may be needed for:

• Stormwater

• Flood water

• Pits

• Water with sediment

• Water with organic matter

• Drainage applications

Using a clean water pressure pump in dirty water can damage the pump and reduce performance.

Pressure Pumps for Rainwater Tanks

A pressure pump can help move water from a rainwater tank to fixtures or outdoor taps.

Rainwater tank pump selection depends on:

• Tank size

• Tank outlet position

• Distance from tank to pump

• Distance from pump to fixtures

• Height difference

• Number of outlets

• Required pressure in kPa

• Required flow in L/min

• Garden irrigation demand

• Household fixture demand

• Electrical supply

• Weather exposure

• Noise placement

• Water quality

If tank water contains sediment, leaves or debris, pre-filtration or tank maintenance may be needed to protect the pump.

Pressure Pumps for Home Water Supply

A household pressure pump may help deliver water to fixtures where the property uses tank water or a private water supply.

Household pump selection depends on:

• Number of people in the home

• Number of bathrooms

• Peak water use

• Number of outlets running together

• Required flow in L/min

• Required pressure in kPa

• Pipe length and size

• Vertical lift

• Tank location

• Power supply

• Water source reliability

A pump that is too small may struggle during peak use. A pump that is too large may cycle unnecessarily or create pressure issues.

Pressure Pumps for Garden and Irrigation

Garden and irrigation use can place high demand on a pressure pump. Sprinklers, irrigation zones and hose use need enough flow and pressure to operate properly.

Before choosing a garden or irrigation pump, check:

• Number of irrigation zones

• Sprinkler flow requirements

• Required pressure in kPa

• Required flow in L/min

• Hose length

• Pipe diameter

• Tank capacity

• Pump run time

• Whether the pump will run frequently

• Whether filtration is needed

• Whether water quality may block emitters

Irrigation design should be checked before ordering a pump, especially where multiple sprinklers or zones are involved.

Pressure Pumps for Low Water Pressure

Pressure boosting should be handled carefully. A pump should not be added before diagnosing why the pressure is poor.

Before choosing a pressure boosting pump, check:

• Existing pressure in kPa

• Existing flow in L/min

• Whether the issue affects one fixture or the whole property

• Whether filters or valves are restricting flow

• Whether pipework is undersized

• Whether council supply pressure is low

• Whether boosting is permitted for the setup

• Whether a break tank is needed

• Maximum safe pressure for the plumbing system

A pressure boosting pump can help in the right setup, but it can also create issues if installed incorrectly.

Noise and Pump Placement

Pump noise can matter in homes, townhouses and acreage properties.

Before choosing a pump location, consider:

• Distance from bedrooms

• Distance from neighbours

• Wall mounting or slab mounting

• Vibration

• Pipe noise

• Weather exposure

• Access for servicing

• Ventilation

• Drainage around the pump

• Protection from flooding

A good pump in the wrong location can still create problems.

Weather Protection and Outdoor Installation

Many pressure pumps are installed outdoors or near tanks. Weather exposure should be considered before ordering.

Check:

• Whether the pump is rated for outdoor use

• Whether a cover is required

• Whether airflow around the motor is maintained

• Whether the pump is protected from rain

• Whether the pump is protected from flooding

• Whether the controller is protected

• Whether the base is stable and level

• Whether there is easy access for maintenance

Do not fully enclose a pump in a way that traps heat or prevents ventilation.

What Is Not Included in Supply-Only Pressure Pump Pricing?

For supply-only products, the listed product price generally covers the product only.

It does not usually include:

• Installation labour

• Plumbing work

• Electrical work

• Pipework changes

• New valves

• Pressure testing

• Flow testing

• Tank modifications

• Pump covers

• Concrete bases

• Weather protection

• Filtration before the pump

• Pressure limiting valves

• Drainage work

• Fault diagnosis

• Old pump removal

• Disposal

• Ongoing servicing

• Site assessment

Before ordering, confirm the correct pump and installation requirements with your installer.

Supply-Only Pressure Pumps from Installed Today

Installed Today offers supply-only pressure pump ordering for customers who already know which product they need or have an installer organised.

Supply-only may suit you if:

• The water source has been confirmed

• Required flow in L/min has been checked

• Required pressure in kPa has been checked

• Pipework size and distance have been reviewed

• Tank setup is suitable

• Electrical requirements have been checked

• Installation location is suitable

• Weather protection has been considered

• Your installer has confirmed the pump choice

• You understand what is not included in the product price

For pressure boosting, diagnose the cause of poor pressure before ordering a pump.

Pressure Pump Maintenance

Pressure pumps need maintenance to keep working reliably.

General pump maintenance may include:

• Checking for leaks

• Keeping the pump area clean

• Checking for unusual noise

• Checking vibration

• Checking pressure changes

• Cleaning strainers where fitted

• Checking filters before the pump

• Keeping tank outlets clear

• Protecting the pump from running dry

• Checking electrical connections visually

• Following the manufacturer’s service guide

Do not attempt electrical repairs yourself. Use licensed trades where required.

Signs a Pressure Pump May Need Attention

A pressure pump may need inspection if you notice:

• No water flow

• Low pressure

• Pump cycling on and off

• Pump running constantly

• Pump not starting

• Pump overheating

• Unusual noise

• Vibration

• Air in water lines

• Loss of prime

• Water leaks

• Burning smell

• Controller fault

• Pressure dropping quickly

Turn the pump off if it appears unsafe, leaking badly, overheating or making unusual electrical smells.

Common Mistakes When Choosing Pressure Pumps

Choosing the Biggest Pump

A bigger pump is not always better. Oversizing can cause cycling, pressure problems and unnecessary cost.

Ignoring Flow Rate

Flow rate in L/min must match household use, irrigation demand or transfer requirements.

Ignoring Pressure

Pressure in kPa must suit fixtures, pipework and system limits.

Adding a Booster Pump Without Diagnosis

Poor pressure can be caused by valves, filters, pipe size or supply problems. A pump is not always the first fix.

Choosing a Clean Water Pump for Dirty Water

Clean water pumps should not be used for dirty water, stormwater or debris unless the model is rated for it.

Forgetting Suction Lift

A pump may struggle if it is too far from the water source, too high above the water or connected with unsuitable suction pipework.

Not Checking Electrical Requirements

Pumps need safe, suitable power. Outdoor electrical setups must be checked properly.

Forgetting Maintenance

Pumps, filters, strainers and controllers need maintenance to keep working reliably.

Before Ordering Checklist

Before ordering a pressure pump, confirm:

• Water source

• Intended use

• Required flow rate in L/min

• Required pressure in kPa

• Number of outlets

• Peak demand

• Tank location

• Suction lift

• Vertical height

• Pipe length

• Pipe diameter

• Water quality

• Sediment risk

• Whether pre-filtration is needed

• Electrical supply

• Outdoor location

• Weather protection

• Noise placement

• Controller requirements

• Dry-run protection

• Whether pressure boosting is actually needed

• Installer confirmation before buying supply only

Frequently Asked Questions

What is a pressure pump?

A pressure pump is a water pump designed to move water and deliver pressure to taps, fixtures, irrigation systems or household water lines.

What is a pressure pump used for?

Pressure pumps are commonly used for rainwater tanks, household water supply, garden taps, irrigation, clean water transfer and mains pressure boosting where the setup suits.

What type of pressure pump do I need?

The right pump depends on the water source, required flow in L/min, required pressure in kPa, pipework, suction lift, electrical supply and intended use.

Can a pressure pump increase water pressure?

Yes, in some situations. However, low pressure should be diagnosed first because valves, filters, pipe size, fixtures and incoming supply can all affect pressure.

What size pressure pump do I need for a house?

The right size depends on the number of outlets, peak water use, required flow in L/min, required pressure in kPa, pipework, tank setup and height difference.

Is a variable speed pressure pump worth it?

A variable speed pump may be worth considering where water demand changes and consistent pressure is important. It still needs correct sizing and installation.

Do pressure pumps need a tank?

Some systems use pressure tanks to reduce cycling and smooth water delivery. Whether one is needed depends on the pump and system design.

Can I use a clean water pressure pump for dirty water?

No, not unless the pump is specifically rated for dirty water. Clean water pumps can be damaged by debris, sediment or sludge.

Does supply-only pressure pump pricing include installation?

No. Supply-only generally means product only unless installation is selected or clearly shown. Plumbing, electrical work, pipework, valves, pressure testing, old pump removal and site assessment are usually separate.

Should I install a pressure pump myself?

Pressure pumps can involve plumbing, electrical supply, pressure, valves, water source setup and safety requirements. Use licensed trades where required and confirm installation suitability before ordering.

Final Word

Pressure pumps can be a practical solution for rainwater tanks, household water supply, garden irrigation, clean water transfer and selected pressure boosting setups. The key is choosing the right pump for the application, not simply choosing the largest or cheapest option.

Before ordering through Installed Today, confirm your water source, required flow in L/min, pressure in kPa, pipework, tank setup, electrical supply, water quality and installation location. For pressure boosting, diagnose the cause of poor pressure before adding a pump.

Supply-only pressure pump ordering can be a good option when you already have an installer organised and the correct model has been confirmed.