Nylon Pipe & Hose Fittings

What Are Nylon Pipe & Hose Fittings?

Nylon pipe and hose fittings are the connectors, adapters, elbows, couplers, and barbed ends that hold your RV or marine plumbing system together. Whether you're routing freshwater to a livewell, managing bilge drainage, connecting a deck drain, or plumbing a holding tank, these fittings serve as the critical links between hoses, pipes, pumps, and through-hull hardware. Without reliable fittings, even the best hose or pump is only half the system.

Why Nylon? Material Matters on the Water

Nylon fittings have become a staple in above-the-waterline marine and RV plumbing for several compelling reasons. Nylon pipe and hose fittings are lightweight, corrosion-resistant, and well-suited for freshwater, bilge, livewell, and general plumbing applications — environments where metal fittings can corrode or add unnecessary weight. As a rule, nylon is best reserved for above-the-waterline service, while bronze or stainless steel remains the standard for below-the-waterline through-hull fittings.

Nylon is also an economical alternative to more costly bronze or Marelon® fittings, making it the go-to choice for non-critical deck and cabin plumbing runs where budget and weight savings matter. It resists many chemicals and stands up well to the UV and moisture exposure common in marine and RV environments, especially when the fittings are UV-stabilized.

Types of Fittings You'll Find Here

This category covers a broad range of configurations to handle virtually any plumbing layout:

• Elbows (45° and 90°): Change the direction of a run without kinking the hose.
• Straight couplers & nipples: Join two sections of hose or pipe in a straight line.
• Y-fittings & T-fittings: Split or merge flow paths, common in livewell and drainage systems.
• Pipe-to-hose adapters: Bridge the gap between threaded pipe (NPT) ends and slip-over hose barbs.
• Thru-hull connectors: Route hose through a deck or hull panel cleanly and securely.
• End caps: Terminate an unused port or line.

Key Considerations When Shopping

Getting the right fitting requires matching a few critical specs. First, confirm whether your existing plumbing uses NPT (National Pipe Taper) or BSP (British Standard Pipe) threads — mixing thread standards is a common source of leaks. Second, match the fitting barb OD to your hose's inside diameter for a snug, clamp-ready seal. Fiberglass-reinforced nylon fittings are also available for added strength in higher-pressure sanitation and water-fill applications. When in doubt about below-the-waterline service, step up to bronze or a non-metallic marine-grade alternative.

Top Brands in Nylon Pipe & Hose Fittings

Jiffy-Tite leads this category with a well-earned reputation for precision-engineered quick-connect and push-to-connect fitting systems that simplify installation without sacrificing a secure, leak-free seal — making them a favorite for boaters and RV owners who value speed and reliability.

Seachoice is a trusted name in marine accessories and OEM-replacement hardware, offering a wide range of nylon fittings including thru-hull connectors and Y-fittings designed specifically for boating and watersports applications at an accessible price point.

Trident Hose brings deep marine plumbing expertise to its nylon fittings lineup, with products engineered to pair seamlessly with marine-grade hose series used in sanitation, deck drain, and water-fill systems.

T-H Marine rounds out the selection with UV-stabilized plastic and nylon fittings — including 90-degree thru-hull elbows with user-friendly installation features — backed by decades of experience outfitting freshwater fishing and recreational boats.

For shop and utility plumbing needs, Milton Industries contributes a selection of nylon push-to-connect and barbed fittings that cross over seamlessly from workshop air systems into RV and marine utility plumbing applications.