Airless Paint Sprayer Maintenance: Cleaning, Storage & Troubleshooting Guide

An airless paint sprayer is designed to save time on the job. But if it isn't cleaned and maintained properly, that advantage can disappear quickly.

Dried paint can clog filters and spray tips. Worn components can affect pressure and spray quality. A poorly stored machine may also be harder to prime the next time you need it.

The good news is that most routine maintenance is straightforward.

Whether you're a professional painter, contractor or occasional DIY user, a consistent maintenance routine can help keep your airless paint sprayer reliable and ready for the next job.

This guide covers the essentials: cleaning after each use, routine inspections, common problems, storage and the maintenance equipment worth keeping on hand.

Important: Airless sprayers operate at high pressure. Always follow the safety instructions and pressure-relief procedure in the manufacturer's manual before cleaning, servicing or inspecting the equipment.

Why Airless Paint Sprayer Maintenance Matters

Regular maintenance isn't just about keeping a machine looking clean.

It helps prevent the small problems that can turn into expensive downtime.

A properly maintained sprayer can help you:

reduce clogged tips and filters;
maintain a more consistent spray pattern;
identify worn components earlier;
reduce unnecessary downtime;
protect pumps, hoses and fittings;
and keep the equipment ready for the next job.

Manufacturer guidance also emphasizes regular cleaning and inspection as part of maintaining sprayer performance. Graco, for example, recommends cleaning the sprayer after use and paying particular attention to filters, strainers and spray tips.

Think of maintenance as part of the painting process, not something you do only when the machine stops working.

How to Clean an Airless Paint Sprayer After Use

Cleaning your airless sprayer properly after every use is crucial. Here’s a basic post-job cleaning routine that applies to most water-based paint jobs:

1. Relieve the pressure

Before removing the spray tip, filter, hose or other components, follow the manufacturer's pressure-relief procedure.

Never work on a pressurized airless system.

This is one of the most important safety steps in airless sprayer maintenance.

2. Remove leftover paint

Return usable paint to the appropriate container where practical.

Then place the intake system into the correct flushing fluid for the coating being removed.

3. Flush the system

Run the appropriate flushing fluid through the pump, hose and gun until the material being removed has been cleared.

The correct fluid depends on the coating.

For example, water-based coatings are commonly flushed with water, while solvent-based products may require a compatible solvent specified by the coating or equipment manufacturer.

Don't assume that one cleaning solution works for every paint.

4. Clean the gun and spray tip

Remove the spray tip and guard according to the manufacturer's instructions.

Clean away paint residue using a compatible cleaning fluid and an appropriate soft brush.

Never try to clear a high-pressure tip blockage with your fingers.

5. Clean the filters and strainers

Check the gun filter, inlet strainer and any pump or manifold filters fitted to your machine.

A restricted filter can reduce material flow and contribute to poor spray performance.

6. Inspect the equipment

Before putting the sprayer away, look for:

leaking fittings;
damaged hose covers;
cracks;
worn connections;
damaged seals;
blocked filters;
and unusual paint build-up.

This is a good time to catch a problem before it becomes a problem on the next job.

What Should You Check Regularly?

Not every maintenance task needs to happen after every job.

A simple inspection routine can help you spot wear before it affects your work.

Spray Tip

A worn or damaged tip can change the spray pattern and affect material usage.

If the fan becomes narrower than expected, the pattern becomes uneven or the sprayer struggles to maintain the required pressure, inspect the tip and replace it when necessary.

Tip life varies depending on the coating and working conditions, so don't rely on a fixed number of jobs or litters as a universal replacement point.

Filters and Strainers

Check filters regularly and clean or replace them when required.

Blocked filters can restrict material flow and contribute to pressure or spray-pattern problems.

High-Pressure Hose

Inspect the hose before use.

Look for:

cuts;
abrasions;
cracks;
kinks;
bulges;
exposed reinforcement;
damaged fittings.

Do not continue using a damaged high-pressure hose. Follow the equipment manufacturer's replacement requirements.

Gun and Connections

Check the gun, trigger, guard and fluid connections.

Look for leaks or damaged components.

Always relieve pressure before tightening or servicing fluid connections.

Pump

The pump is one of the most important components in the system.

If you notice persistent leakage, unusual pressure behaviour or other changes in performance, consult the manufacturer's service instructions rather than continuing to operate the machine.

For equipment that sees heavy professional use, scheduled servicing can also make sense.

Common Airless Sprayer Problems & What to Check

When an airless sprayer starts behaving differently, the cause isn't always a major pump failure.

Start with the simple checks.

1. The Sprayer Won't Prime

Possible causes:

blocked inlet screen;
dried material;
restricted suction tube;
air entering the system;
or a problem with the inlet valve.

What to check:

Start by checking the suction path, inlet screen and relevant valves according to the machine's manual.

Avoid forcing components or disassembling the pump unless you're familiar with the manufacturer's service procedure.

2. The Spray Pattern Is Uneven

Possible causes:

clogged tip;
worn tip;
blocked filter;
incorrect tip size;
or unsuitable pressure.

What to check:

Inspect and clean the tip and filters first.

If the tip is worn, replacement may restore the correct pattern. Graco's troubleshooting guidance similarly points to worn or blocked tips and restricted filters as common causes of distorted spray patterns.

3. The Spray Is Pulsing or Surging

A pulsing spray can indicate inconsistent fluid delivery.

Possible causes include:

restricted filters;
a worn spray tip;
air entering the system;
an incorrect tip;
or pump-related issues.

Work through the basic checks before assuming the pump needs repair.

4. Paint Is Leaking

Check the fluid connections, fittings and seals.

Do not simply tighten everything as much as possible.

Over-tightening can damage components, so use the manufacturer's instructions for the correct procedure.

If paint is leaking around the pump or packing area, professional servicing may be required.

5. The Sprayer Has Low Pressure

Low pressure can have several causes.

Start with:

spray tip condition;
filters;
suction screen;
hose and connections;
pressure settings;
coating compatibility.

If the basic checks don't solve the problem, consult the equipment manual or an authorized service technician.

Choosing the Right Cleaning Fluid

The cleaning fluid should match the coating and the manufacturer's instructions.

Water-based coatings

Water is commonly used for flushing water-based architectural paints, although a suitable cleaning product may also be recommended.

Solvent-based coatings

Use the compatible solvent specified by the paint manufacturer and equipment manufacturer.

Specialty coatings

For lacquers, industrial coatings and other specialty materials, always follow the coating manufacturer's cleaning instructions.

Don't automatically reach for mineral spirits just because it's commonly used in painting.

The wrong solvent can damage components or create a safety issue.

And never mix cleaning chemicals unless the manufacturer specifically says it is safe to do so.

For any coating you're unfamiliar with, check the product's Safety Data Sheet (SDS) and application instructions.

Storing an Airless Paint Sprayer in Australia

Australian conditions can vary significantly.

Heat, humidity, dust and long periods of storage can all affect equipment.

The best approach is simple:

Clean it properly, protect the internal components and store it somewhere dry and sheltered.

Short-Term Storage

If you're using the sprayer again soon, follow the manufacturer's recommended shutdown and storage procedure.

Don't leave paint sitting inside the system simply because you're planning to use it again tomorrow.

Some equipment can be left prepared for short periods under specific manufacturer instructions, but this varies by machine and coating.

Longer-Term Storage

For longer periods, thoroughly clean the system and use the manufacturer's recommended storage fluid or protectant.

For example, Graco recommends Pump Armor for certain sprayers during storage and notes that proper storage helps protect against corrosion and freezing.

Not every sprayer uses the same maintenance fluid, so check your model's manual before adding anything to the pump.

A few simple storage habits:

keep the machine out of direct sunlight;
store it in a dry, sheltered area;
avoid tightly bending the hose;
keep small components together;
protect the machine from dust;
and never store the system under pressure.

Build a Simple Airless Sprayer Maintenance Kit

You don't need a huge workshop to stay prepared.

A basic maintenance kit could include:

soft cleaning brushes;
compatible cleaning fluid;
manufacturer-approved pump protectant;
spare spray tips;
replacement filters;
clean rags;
suitable gloves;
and basic tools required by your specific machine.

For professional painters, keeping a few common replacement parts on hand can also reduce downtime when something needs replacing during a job.

The exact parts will depend on your sprayer model.

What About Hot Australian Weather?

Heat can affect working conditions, coatings and equipment, but there is no single “summer maintenance routine” that applies to every sprayer.

Instead, focus on good equipment habits:

Keep the machine clean.
Keep it out of unnecessary heat.
Allow adequate airflow.
Follow the coating manufacturer's temperature limits.
Store it somewhere dry and protected.

Also remember that the paint itself has temperature and application requirements.

A sprayer may be operating correctly while the coating is still unsuitable for the conditions.

A Simple Airless Sprayer Maintenance Schedule

Rather than trying to remember everything, use a simple routine.

Maintenance	When
Relieve pressure correctly	Every shutdown / before servicing
Clean spray tip	After use
Clean gun filter	After use or as required
Check inlet strainer	Regularly / after use
Flush pump and hose	After each coating job
Inspect hose	Before each use
Check fittings for leaks	Before each use
Inspect tip condition	Regularly
Check pump components	According to manufacturer
Long-term storage protection	Before extended storage
Professional service	According to usage and manufacturer guidance

The exact schedule should always follow the maintenance requirements for your particular machine.

Signs Your Sprayer May Need More Than Routine Maintenance

Sometimes cleaning isn't enough.

Consider professional service if you notice:

persistent fluid leaks;
pressure that remains inconsistent after basic checks;
unusual mechanical noise;
repeated priming problems;
paint leaking from the pump;
damaged electrical components;
damaged high-pressure hose;
or performance that continues to deteriorate despite proper cleaning.

Trying to repair a high-pressure system without the right knowledge can create unnecessary risk.

When in doubt, use the manufacturer's service information or an appropriately qualified repair center.

Where to Buy Sprayer Maintenance Supplies in Australia

PaintAccess.com.au – Offers sprayer fluids, filters, guards, tips.
Trade-focused paint stores like Inspirations Paint or Dulux Trade Centres.
Hardware stores – Bunnings for basic brushes and solvents.

Frequently Asked Questions

How often should I clean my airless paint sprayer?

Ideally, clean and flush the sprayer after each painting job.

If you are changing coatings or colours, additional flushing may be required.

The exact procedure depends on the coating and equipment.

Can I leave paint in an airless sprayer overnight?

It is generally best not to leave paint sitting in the system unless the manufacturer specifically provides instructions for that situation.

Paint can dry inside the tip, gun, filters, hose or pump and cause problems when you start the machine again.

What should I use to clean an airless paint sprayer?

Use a cleaning fluid compatible with the coating and approved by the equipment manufacturer.

Water is commonly used for water-based coatings, while compatible solvents may be required for solvent-based products.

Always check the product and equipment instructions.

Do I need to clean the spray tip after every use?

Yes, it is good practice.

Paint build-up or dried material can affect the spray pattern and contribute to blockages.

Clean the tip using the manufacturer's recommended procedure and a suitable brush or cleaning fluid.

How do I know when an airless spray tip needs replacing?

A worn tip can produce a poor or uneven fan pattern and may require higher pressure to achieve acceptable atomisation.

If cleaning doesn't restore the pattern, the tip may need replacement.

Tip life depends on the coating and usage, so there is no universal replacement interval.

Why does my airless sprayer keep losing pressure?

Possible causes include a worn or incorrect spray tip, blocked filters, a restricted inlet, air entering the system or pump-related issues.

Start with the basic checks recommended in your equipment manual.

Why won't my airless paint sprayer prime?

Check the inlet screen, suction tube, valves and fluid path for blockages or dried material.

If the problem continues after cleaning, consult the manufacturer's troubleshooting procedure.

Can I use mineral spirits to clean every airless sprayer?

No.

The correct cleaning fluid depends on the coating and the equipment.

Some sprayers and coatings require specific cleaning procedures, and some machines have components that should not be exposed to certain solvents.

Always follow the manufacturer's instructions.

How should I store an airless paint sprayer for several months?

Clean and flush the system thoroughly, then use the manufacturer's recommended storage procedure and protectant.

Store the machine in a dry, sheltered location and keep the system depressurised.

Some manufacturers recommend specific pump protectants for extended storage.

How long can an airless paint sprayer last?

There is no single lifespan.

Usage, model, coating type, maintenance and replacement of wear components all make a difference.

Regular cleaning and preventative maintenance can help extend the useful life of the equipment.

Final Thoughts: Maintenance Is Non-Negotiable

Your airless sprayer is an investment — treat it like one. Regular maintenance doesn’t just save money; it improves results and extends the life of your tools.

By following a consistent maintenance routine, using proper cleaning agents, and spotting early signs of wear, you'll ensure your sprayer stays job-ready for years to come.

Don’t wait until something breaks. Clean, check, lubricate — and paint like a pro.

Need expert advice on your sprayer model or troubleshooting a problem? Get in touch with PaintAccess — our team is always ready to help Aussie painters get the best out of their gear.