RV plumbing fittings connect water lines, repair leaks, and adapt between different connection types throughout your freshwater and drain systems. Unlike residential plumbing, RV systems use lightweight PEX tubing and specialized fittings designed to handle vibration and movement during travel. We stock barbed fittings, compression fittings, push-to-connect (SharkBite-style) fittings, and threaded adapters in the sizes RV systems actually use.

What to Know Before You Buy

• Identify your tubing type and size: Most RVs use 1/2-inch PEX or polyethylene tubing, but older rigs may have 3/8-inch lines.
• Push-to-connect fittings make repairs easier—no crimping tools required—but barbed fittings with clamps are more economical for multiple connections.
• Use only food-safe, lead-free fittings on freshwater lines to maintain potable water quality.
• Carry a small fitting assortment for roadside repairs—a leaking fitting can drain your freshwater tank fast.

Questions about your RV's plumbing system? Our experts can help you identify what you need for repairs or upgrades.

Free shipping on most orders $99+ (US lower 48). Expert support and 90-day returns.