T-H Marine Y-118 Barbed Wye Y-Fitting, 3-Way, 1-1/8 Inch Hose Barb

The T-H Marine Y-118 is a barbed wye (Y) fitting molded specifically to fit 1-1/8 inch marine hose. A wye fitting has three openings and is used to create a branch line, similar to a tee fitting except that the side inlet enters at a 45 degree angle rather than 90 degrees. This angled branch reduces friction and turbulence that can otherwise hamper flow through the line, making the Y-118 a practical choice anywhere you need to join or split a 1-1/8 inch hose run.

On board, a Y fitting like this can offer better drainage than a standard tee and may be easier to install in tight spaces due to its angled leg. All three legs of the Y-118 share the same 1-1/8 inch barb dimension, so it mates cleanly with standard 1-1/8 inch marine hose on every connection point. It is commonly used in bilge, scupper, and livewell drain lines, and other plumbing runs where two hose paths need to combine into one, or one hose needs to split into two.

Specifications

• Brand: T-H Marine
• Manufacturer Part Number: Y-118
• Product Type: Barbed Wye / Y-Fitting, 3-Way
• Hose Size (all legs): 1-1/8 inch barb
• Branch Angle: 45 degrees
• Weight: 0.12 pounds
• Packaging: Bulk, 50 per box

Frequently Asked Questions

What hose size does the T-H Marine Y-118 fit? The Y-118 is sized for 1-1/8 inch ID marine hose, and all three legs of the fitting share that same 1-1/8 inch barb dimension.

How many hose connections does this fitting have? It is a 3-way wye fitting, meaning it has three barbed openings so two hose runs can be joined into one, or one run split into two.

What is the difference between a wye fitting and a tee fitting? On the Y-118, the side inlet enters at a 45 degree angle rather than the 90 degree angle used on a standard tee fitting, which reduces friction and turbulence in the flow compared to a tee.

Why choose a Y fitting instead of a tee fitting for a drain line? The angled branch on the Y-118 can provide better drainage than a straight tee connection and may be easier to install in tight spaces due to its angled leg.

How much does the Y-118 fitting weigh? The T-H Marine Y-118 weighs 0.12 pounds.

What is this fitting typically used for on a boat? The Y-118 wye fitting is used to create branch lines in 1-1/8 inch hose runs, such as combining or splitting bilge, scupper, or drain hose lines.

Are all three legs of the Y-118 the same size? Yes, the Y-118 has the same 1-1/8 inch barb dimension on all three legs of the fitting.

How is the Y-118 packaged? The T-H Marine Y-118 ships in bulk packaging, 50 units per box.

Is the Y-118 the same as the Y-750 or Y-112 fitting? No, the Y-118 is sized for 1-1/8 inch hose specifically; the Y-750 fits 3/4 inch hose and the Y-112 fits 1-1/2 inch hose, so each is a different part for a different hose size.

Can the Y-118 be used to reduce the number of exit fittings in a hull? Yes, using a Y-118 wye fitting to combine two 1-1/8 inch hose lines into one can reduce the number of separate exit fittings and hull penetrations needed.