Chad's Tips_What Is a PC Pump and why is it useful?

Written by Chad Robinson, Service & Hire Manager at SprayPlant

Chad's Guide to PC Pumps & Spray Machines

If you’ve ever shopped for a paint sprayer, you’ve probably come across the term “PC pump.” But what exactly is a PC pump and why should you care?

In this guide we’ll break down:

• What a PC pump is and how it works
• Why PC pumps are common on so many spray machines
• Popular PC pump spray machines at Spray Plant UK
• Frequently asked questions buyers have about each model

What Is a PC Pump?

A PC pump (Pressure Control pump) is a type of pump used in many paint spray machines. It’s designed to deliver consistent pressure to your spray gun, ensuring smooth material flow and even coverage whether you’re spraying emulsion, masonry paint, or higher viscosity coatings.

In simple terms a PC pump regulates the pressure of paint or material fed to your spray gun, for a consistent finish.

PC pumps are often:
✔ Durable
✔ Easy to clean
✔ Cost-effective to replace
✔ Suitable for a wide range of materials

Why do PC Pumps Matter in Spray Machines?

A high-quality pump impacts:

• Flow consistency
• Spray finish smoothness
• Ability to spray thicker materials
• Machine longevity
• Ease of maintenance

Think of the PC pump like the engine in a car you can have a great design, but the pump determines how well the machine actually performs.

Are PC pumps only used in contractor spray machines?

PC Pumps are found on contractor and domestic spray machines because they strike a good balance between performance and affordability.

Spray Plant UK stocks a range of machines that use PC pumps from entry-level to contractor-grade. Here’s an easy breakdown of what each model is best for:

Graco 390 PC (Corded and Cordless) – Entry Level, User-Friendly

The 390 PC is a popular choice for homeowners and DIY painters. It features a PC pump that’s robust enough for regular decorating tasks.

Graco 390 PC Frequently asked questions

1.      Can the 390 spray emulsion, masonry, and eggshell?
Yes, it handles most common water-based paints and finishes well.

2.      What’s the difference between the corded and cordless version?
The cordless gives freedom of movement. Beneficial if power points are tricky to reach.

3.      Is it good for garden fences, sheds, and walls?
Yes, it’s versatile for interior and exterior projects.

Graco 695 and 650 PC Machines – Pro Contractor Range

These aren’t your average budget sprayers they’re professional contractor machines featuring PC pumps tuned for higher workload.

Graco 695 and 650 Frequently asked questions

1.       Are these suitable for large areas?
Yes, excellent for decorating multiple rooms or commercial spaces.

2. What materials can they spray?
   Emulsion, masonry paints, textured coatings and even thicker contractor materials
3. What’s the difference between the 650 & 695?
   The difference between the Graco 650 and 695 is capacity and output. The 695 offers slightly more power and throughput for bigger jobs.

Mark V – Versatile Contractor Machine

The Mark V sits between entry-level and pro contractor. Its PC pump lets you spray:
✔ Emulsion
✔ Masonry
✔ Some textured coatings

Mark V Frequently asked questions

1.       Is the Mark V better than a 390?
The Mark V is more capable on larger projects and thicker coatings.

2. Can the Mark V handle commercial painting?
   Absolutely, especially for apartments, offices, retail spaces.

King PC – The All-Rounder for Every Job

The King PC sits at the top of the PC-pump range. It is a high-capacity machine that tackles a large range of materials.

Why people choose this one:

• Bigger jobs with thick materials
• Frequent painters and contractors
• Projects where you don’t want to compromise finish quality
• Up to 6 gun capability.

King PC Frequently asked questions:

• Can the King PC spray both masonry and smooth finishes?
  Yes it’s flexible for textured and emulsion paints alike.
• Is it worth paying extra?
  For contractors or regular users the King PC offers larger capacity alongside enhanced mobility, providing maximum efficiency.

Why experience spray painters by a spare pump:

One tip experienced painters share is to buy a spare PC pump!
Just like a spare tyre, it gives you insurance against downtime. If you are on site and your pump clogs or fails, simply swap the damaged pump with your spare pump and carry on. You can send off your damaged pump to us to be repaired at your earliest convenience. Minimal cost, minimal time lost.

This is why many pros buy an extra PC pumps.

What about Dual Spray Gun Setups

Some machines (like twin-gun setups compatible with the 695 range) let you connect two guns at once or more with the Graco King PC.

That means:
✔ Two or more painters working together
✔ Faster coverage
✔ One machine powering two or more guns

This setup is ideal when speed and efficiency matter, specifically large walls or commercial sites.

Quick Model Comparison

PC Pump in summary and where to get additional advice:

A PC pump is more than just a component; it’s the heart of many spray machines. It keeps pressure steady, gives consistent finishes, and allows you to tackle a variety of paints and coatings.

Whether you’re a first-time domestic sprayer, looking at a 390 PC or a pro considering a King PC, understanding how the pump works and why having a spare is a good idea will help you make an informed choice and could save you time and money.

As with all our machines, the material you are spraying, and the size of the job will make a difference to the advice we give. If you want to find out more about the best machine to use for your project, get in touch with our experienced team today.

About the Author

Chad Robinson is the Service & Hire Manager at SprayPlant, with deep expertise in spray gun systems, maintenance, and equipment rental. He works closely with customers to ensure they get the best performance from their kit—whether buying or hiring.