Written by Chad Robinson, Service & Hire Manager at SprayPlant
If you're painting interior walls with a Graco airless sprayer, choosing the right spray tip is just as important as selecting the right paint. The wrong tip can lead to heavy application, leading to runs and sags on your finish. Constant tip blockages resulting in loss of time and increase in material usage and wastage.
This guide will walk you through exactly what Graco tips you need for interior walls, especially focusing on the RAC-X Low Pressure (LP) and Fine Finish Low Pressure (FFLP) tips that are most popular with UK decorators and professional painters in 2025.
Best Graco Tips for Interior Walls
Top Recommendation: Graco RAC-X LP 517 or LP515Tip
- Fan width: 10 inches (25 cm)
- Orifice size: 0.017" - 0.015”
- Use for: Emulsion (matte, vinyl, silk), ceiling paints
- Why it works: The LP 517/515 gives excellent coverage on walls without excessive overspray. It’s designed to work at lower pressure, meaning you save paint, and get a smoother finish.
Alternative: Graco FFLP 514 or FFLP 312 Tip
- FFLP 514: 10-inch fan, 0.014" orifice – best for thinner paints and tighter control
- FFLP 312: 6-inch fan, 0.012" orifice – ideal for smaller wall sections, edges, and low-viscosity coatings
- Use for: Eggshell, satin, and acrylic paints
- Why it works: Fine Finish tips atomise paint more delicately, making them great for walls that need smooth, even layers.
What UK Decorators Should Know about Graco Tips
- UK homes often use vinyl matt or silk emulsions, which work best with LP 515 or 517 tips
- UK-standard sprayers (230V models like the Graco Classic 390PC or Mark V) are compatible with both LP and FFLP tip guards
- For small space UK interiors (bathrooms, some hallways), consider FFLP 312 or LP 411 for precision spraying. Please be aware however that regardless of small spaces you may need a larger orifice depending on what paint they are using. Check manufacturers advice or give the Spray Plant UK team a call.
How to Read a Graco Tip Number
- First digit (x2) = Width of spray fan in inches at 12" from surface
- Last two digits = Orifice size in thousandths of an inch
Example: A 517 tip = 10-inch fan (5×2) and 0.017" orifice
Chad’s FAQs: Which Graco Tips to use for Interior Painting
Please note that this is generic advice. Always check before you spray.
1. What’s the difference between RAC-X LP and FFLP tips?
- LP Tips: General-purpose low-pressure tips for walls, ceilings, fences – most decorators use these. These are engineered for you to use with your sprayer with up to 50% less pressure, prolonging the life of your sprayer.
- FFLP Tips: Designed for ultra-smooth finishes on cabinets, trim, and interior walls needing detail. These are engineered for you to use with your sprayer with up to 50% less pressure, prolonging the life of your sprayer and provide an overall finer finish.
2. Can I use an FFLP tip on walls?
Absolutely! If you're using satin, acrylic or thin emulsion, FFLP tips (like 514 or 312) can produce an incredibly smooth finish, especially on feature walls or where light hits imperfections.
3. Are FFLP and LP tips compatible with my Graco sprayer?
Yes, if you’re using a Graco airless sprayer with RAC-X guard (blue tip holder), you're good to go. Common compatible sprayers in the UK include:
4. How do I reduce overspray on walls?
- Use Low Pressure (LP or FFLP) tips
- Lower your pump’s pressure setting
- Maintain correct spray distance (10–12")
- Keep your hand moving at steady pace
3. How often should I change tips?
- Every 45–225 litres of paint sprayed (depending on paint abrasiveness)
- Worn tips produce narrower fan patterns and uneven coverage so replace when efficiency drops.
Where can I Buy Graco LP & FFLP Tips in the UK?
Looking for genuine Graco tips, guards or accessories? Spray Plant UK are the longest standing Graco distributor in the UK. We stock the full range of RAC-X LP and FFLP spray tips compatible with UK voltage airless systems. Need help choosing? Call our team or check Graco’s Tip Selector Tool diagram.
Final Tip (Pun Intended!)
If you're spraying interior walls in 2025, the Graco RAC-X LP 517 is your go-to workhorse. But for ultra-smooth walls or detailed areas, the FFLP 514 or 312 can deliver a near-brush-like finish, all with the speed of an airless system.
Contact the team at Spray Plant UK if you have any more questions about Tips. Either through our contact page, phone, Chatbot or if you're local come and see us in Leeds, UK.
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.