Hose & Fittings Quick Guide (DIN vs Foster) for PCP Air
A clear, no-jargon guide to DIN threads, Foster quick-disconnects, burst ratings, and hose length—so your PCP fills stay safe, clean, and hassle-free.
Why this guide matters
The right hose and fittings make fills safer, faster, and more consistent. Use this quick guide to choose a setup that works on the bench or in the field without getting lost in specs.
Fittings 101
• DIN (threaded): robust tank/valve connection; great for a fixed setup.
• Foster QD (quick-disconnect): fast on/off between rifles and accessories.
• Adapters: use rated adapters only and keep the chain short—fewer joints, fewer leaks.
How to choose your hose
• Rating: pick a hose rated for modern PCP pressures from a reputable maker.
• Length: long enough for clean routing; short enough to avoid snags.
• Flex: softer, flexible hoses route easier and resist kinks.
• Ends: match ends to your valve and rifle fill; many shooters run DIN at the valve, Foster QD at the rifle side.
• Maintenance: replace at the first sign of kinks, abrasion, or tired O-rings.
Safe setup in five steps
Inspect O-rings and threads; wipe dust and grit.
Attach firmly—no spinning parts under pressure.
Open the valve slowly and watch for a smooth gauge rise.
Pause near target pressure, then top off with short pulses.
Close the valve and bleed the line fully before disconnecting.
Mini-FAQ
Q: DIN or Foster—what should I run?
A: If you mostly fill one rifle from one tank, DIN is a robust fixed setup. If you swap between setups, Foster QD saves time. Many run DIN at the tank and Foster at the rifle for flexibility.
Q: What hose length works best?
A: Bench use favors shorter for tidy routing; backpack or floor-tank use benefits from a bit more length—just avoid tight bends.
Q: Do I need to grease O-rings?
A: Use a small amount of compatible silicone on O-rings only—never on gauges. Replace any seal that looks nicked or flattened.
Next steps
When you’re ready, read focused pieces on safe fills, tank care, backpack routing, and choosing tank size. Use the site menu for Retailers, Contact, and Newsletter.