3M PPS 2.0 Spray Gun Adapter S18 3/8 inch Female 18 NPS — Stainless Steel, Four‑Point Seal

3M PPS 2.0 Adapter #S18 converts a standard spray gun to work with the 3M PPS Series 2.0 disposable cup system for a secure, four-point lid-to-gun connection.

This stainless-steel adapter (model S18, 3/8" female, 18 thread NPS) lets you keep your preferred spray gun while gaining the measuring, mixing and low-waste advantages of the 3M PPS 2.0 system. Designed for professionals in industrial and occupational settings, the adapter threads into your gun after removing its existing cup, providing a broad base and four-point engagement that stabilizes the PPS lid and liner during spraying and cleaning.

How do I install the S18 adapter on my spray gun?

Installation is straightforward: remove the factory cup, then screw the S18 adapter into the gun’s cup thread. The adapter fits a range of gun models with a 3/8" female, 18 thread NPS interface, so check your gun’s threads against the chart to confirm compatibility.

• Remove existing metal or plastic cup from spray gun
• Thread adapter S18 into gun cup outlet until snug
• Attach PPS 2.0 disposable lid and liner for immediate use

What performance changes should I expect using the PPS 2.0 adapter?

Using the S18 adapter gives a sturdier connection between the spray gun and PPS lid, reducing wobble and improving handling consistency. The PPS 2.0 system’s disposable liners and lids minimize contamination and accelerate color changes and cleanups without altering your gun’s spray characteristics.

• Four-point connection increases lid stability under pressure
• Disposable liners reduce cross-contamination and color carryover
• Can cut cleaning solvent use and prep/cleanup time significantly

What materials and solvents is the adapter compatible with?

The adapter is made of stainless steel to resist common solvents and stand up to shop use. It’s suitable for many coatings used with PPS 2.0 liners, including primers, basecoats, clears, varnishes, adhesives and more—follow your material and gun manufacturer guidance for best results.

• Durable stainless-steel construction for solvent resistance
• Compatible with paints, sealers, primers, clearcoats and gelcoats
• Designed for industrial/occupational use; follow safety data sheets

How do I clean and maintain the S18 adapter?

The adapter’s wide-bowl design simplifies cleaning; after use remove the disposable liner and wipe or flush the adapter as needed. Stainless-steel surfaces tolerate typical solvents, making routine maintenance quick and reducing downtime between color changes.

• Discard used PPS liner and lid to avoid residue buildup
• Wipe or flush adapter with appropriate solvent for your coating
• Inspect threads for wear and keep mating surfaces free of debris

Who is this for: The 3M PPS 2.0 Adapter S18 is intended for professional refinishers, collision repair technicians, industrial painters and production shops that want to use their favored spray guns with the PPS 2.0 disposable cup system. It’s built for occupational use where reducing solvent waste, speeding color changes and maintaining a stable gun-to-lid interface matter most.