Hose Connector for Water/Fuel Tank – Ø17/19 mm Barb Fitting

The Ø17/19 mm tank connector is meant for situations requiring a larger flow diameter – such as filling tanks or venting fuel vapors. This bulkhead fitting uses the same gasket-and-nut assembly as the smaller Ø10/12 mm model, but with a wider passage. Its barb (~18 mm) comfortably accommodates hoses with 17 to 19 mm inner diameter. This is the standard size for many fuel tank vent hoses, as well as some water tank filler lines on boats and RVs.

Installation: It is similar to the smaller version – drill a hole, insert the outer part with the gasket, and tighten from inside with the plastic nut. Ensure the hole is large enough for this bigger barb (approximately a 25 mm hole may be needed). After mounting, attach your 17/19 mm hose to the exterior barb and secure it with a clamp. The larger contact area and sturdy material ensure that even a heavy hose will stay supported and leak-free.

Applications:

• Fuel Tank Venting: Larger boats and yachts require ventilation for fuel systems – a ~19 mm (3/4") hose is often used as a vent line. This connector is ideal for installing such a vent hose to the tank, allowing gasoline vapors to safely exit the hull. It ensures a tight seal so water cannot intrude through the vent even in rough seas or rain.
• Water Tank Filling: Many freshwater tanks have ~3/4" (19 mm) inlet/outlet ports. Use this connector to attach a fill hose or a high-volume water pump line. For example, in caravans and motorhomes, a 19 mm hose commonly runs from the exterior fill cap to the internal water tank – this fitting provides the passage through the tank wall.
• Drainage and Toilet Systems: Some marine or RV plumbing systems use 3/4" hoses for drains or marine toilet discharge. The Ø17/19 mm barb can be installed on a grey-water or waste holding tank, creating a secure connection to a pump-out hose or valve.

The durability of the plastic used ensures the connector withstands exposure to fuels (gasoline, diesel) and won’t corrode, unlike metal fittings. This is especially important for vent lines where a mix of air and fuel vapors passes constantly – the plastic won’t react or deteriorate. Additionally, sunlight/UV will not damage this component, which is crucial for above-deck installations.

By installing the Ø17/19 mm connector, you ensure high flow capacity and safety for your tank’s critical functions. Whether it’s fast water refills or reliable fuel venting, this component is up to the task. It’s designed for professional applications and meets the demands of discerning boaters and RV owners who seek quality and peace of mind in their systems’ operation.