Plumbing a boat means picking parts that can handle salt water, fit the hoses you already have, and solve a specific job. A thru-hull fitting passes a hose through the bottom or side of the hull, a transfer pump moves water from one place to another, and a washdown spigot gives you a clean spot to connect a deck hose. Price alone won't tell you which one is right, because these four marine pumps, plumbing fittings, and washdown accessories are built for different tasks. This guide compares them by listed price, material, and intended use, so you can focus on the part that actually matches your project.
Quick take
The listed prices here range from $8.99 to $101, so before you pick a number, decide whether the job is a simple thru-hull, a powered pump, or a washdown spigot. The cheapest option is a 90° polypropylene thru-hull for 3/4" hose, while the most expensive is a polished stainless steel washdown spigot. In between, there's a 316 stainless 1/2" thru-hull and a 12V utility transfer pump. All four items are new, so the real differences are in material, port size, and intended use.
Listed prices at a glance
| Product | Listed price | Price bar |
|---|---|---|
| Scandvik Stainless Steel Washdown Spigot 10187P | USD 101.00 | |
| TruePower 12V DC Utility Transfer Pump 240 GPH | USD 54.99 | |
| Thru Hull Stainless Steel Barbed Short Straight Custom Gasket | USD 28.85 | |
| Marine/Boat 90 Degree Thru Hull Plumbing Fitting for 3/4" Hose | USD 8.99 |
Decision matrix
| Product | Listed purpose | Material |
|---|---|---|
| Marine/Boat 90 Degree Thru Hull Fitting | Thru-hull for 3/4" hose | UV and chemical resistant polypropylene |
| Thru Hull Stainless Steel Barbed Short Straight | Thru-hull for 1/2" I.D. marine hose | 316 stainless steel |
| TruePower 12V DC Utility Transfer Pump | Bilge pumping, water transfer, emergency removal | Stainless steel housing |
| Scandvik Stainless Steel Washdown Spigot | Anchor washdown, deck cleaning, bait wells | Polished stainless steel |
How to choose
Start with the hose size and the direction the line travels. The 90° fitting and the straight thru-hull are both pass-through parts, but one is for 3/4" hose and the other is for 1/2" hose. Then decide whether you need powered water movement: the TruePower pump is the only 12V powered option here. Finally, separate washdown accessories from plumbing below the waterline. The Scandvik spigot belongs on deck, not in the bilge.
Product notes
Scandvik Stainless Steel Washdown Spigot 10187P
This Scandvik spigot is a polished stainless steel marine washdown fitting, built for corrosion resistance and meant for deck washdown, anchor washdown, and bait wells. If you're finishing a washdown station rather than plumbing below the waterline, this is the part that matches that job. Its listed price is the highest in this group, so the trade-off is mostly in the budget: this spigot sits at the upper end of the price range, and it won't move water by itself. Make sure this is the exact piece you're replacing, because a washdown spigot is not a pump or a thru-hull fitting.
TruePower 12V DC Utility Transfer Pump 240 GPH
If water needs to move under 12V power, this TruePower utility transfer pump is the only powered option in this lineup. It has a stainless steel housing, a 240 gallon-per-hour flow rate, and a 23-foot maximum head lift, with a 3/8" NPT female inlet and a 3/4" NPT male outlet. That makes it a candidate for bilge pumping, emergency water removal, or general transfer work. The limitation is that it's a bare pump with threaded connections, so your setup needs matching NPT fittings and hose before the pump can do its job.
Thru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat Plumbing
Listed in the middle of the price range, this short straight thru-hull is made from 316 stainless steel with a polished flange and a custom gasket. The barbs are sized for 1/2" I.D. marine hose, and a 316 stainless mounting nut is included. That makes it a clean-looking option for a 1/2" line that exits the hull straight. The main limitation is the hose size: it's built specifically for 1/2" hose. If your existing line is 3/4", you'll need the other thru-hull fitting on this list.
Marine/Boat 90 Degree Thru Hull Plumbing Fitting for 3/4" Hose
The most affordable entry in this comparison is this 90° thru-hull fitting, made from UV and chemical resistant virgin polypropylene. It's sized for 3/4" hose, and the angle helps when your hose has to make a quick turn right after passing through the hull. It also carries a 1-year warranty. The trade-off is the material: instead of stainless steel, you're choosing polypropylene at the lower end of the price range, so it's worth matching the plastic to your installation environment.
Final recommendation
For a 3/4" hose through the hull, the Marine/Boat 90 Degree Thru Hull gives you the lowest listed price and a functional plastic fitting. For a 1/2" hose and a polished stainless look, go with the Thru Hull Stainless Steel Barbed Short Straight. When water has to be pumped, the TruePower 12V utility transfer pump is the one powered choice here. And for a deck washdown station on a saltwater boat, the Scandvik stainless spigot is the part that fits that specific application. Keep the hose size in mind first, because that will narrow the choices quickly.
