Marine pump, plumbing, and sanitation work usually comes down to one question: do you need to move water, spray it, or pass it through the hull? Those are three different projects, and this group of parts reflects the difference. On the powered side there is a 12V DC utility transfer pump. For the deck side there is a Scandvik stainless steel washdown spigot. And for hull pass-throughs there are two stainless thru-hull fittings, a short straight barbed unit with a custom gasket and a larger stainless thru-hull fitting. Listed prices run from $28.85 to $101.00.
Quick take
If your priority is moving water from a bilge or transferring it for utility duty, the TruePower pump is the workhorse. If you already have a washdown system and need a polished deck outlet, the Scandvik spigot is the finishing piece. If you are routing a hose through the hull, choose the barbed thru-hull with gasket for a short straight pass-through, or the larger thru-hull fitting for a wider pass-through.
Listed-price comparison
| Product | Listed Price | Price Bar | Role |
|---|---|---|---|
| TruePower 12V DC Utility Transfer Pump | USD 54.99 | Powered bilge/utility pump | |
| Scandvik Stainless Steel Washdown Spigot 10187P | USD 101.00 | Deck washdown outlet | |
| Thru Hull Stainless Steel Barbed Short Straight Custom Gasket | USD 28.85 | Short straight thru-hull with gasket | |
| 316 Stainless Steel 1in Thru Hull Fitting | USD 43.99 | Stainless hull pass-through fitting |
Decision matrix
| Component | Choose it if | Keep in mind |
|---|---|---|
| TruePower 12V DC Utility Transfer Pump | You need powered water movement for bilge or transfer jobs | It is a pump, so it needs matching hose connections and wiring |
| Scandvik Stainless Steel Washdown Spigot 10187P | You want a polished washdown outlet for anchor washdown, deck cleaning, or bait wells | It is not a pump; it needs a feed line and a pressure source |
| Thru Hull Stainless Steel Barbed Short Straight Custom Gasket | You want a compact hull pass-through with a gasket included | It is sized for 1/2-inch I.D. hose |
| 316 Stainless Steel 1in Thru Hull Fitting | You need a 1-inch stainless pass-through for water intakes, bilge pumps, or livewell lines | It is not recommended below the waterline |
Product notes
TruePower 12V DC Utility Transfer Pump 240 GPH Stainless Steel Bilge Marine Extra Impeller
The TruePower pump is the only powered mover in this set. It runs on 12V DC at 5 amps, moves 240 gallons per hour, and can lift water up to 23 feet with a maximum pressure of 50 PSI. The stainless steel housing suits bilge, boat, and small-watercraft duty as well as RV and camper transfer needs. Inlet and outlet hookups are 3/8-inch NPT female and 3/4-inch NPT male. Choose it when the task is powered water movement rather than passive routing. The limitation is that it is a utility/bilge pump, not a washdown spigot or a thru-hull fitting, so you still need to supply the correct hose and wiring.
Scandvik Stainless Steel Washdown Spigot 10187P Marine Boat Deck Wash Yacht OEM
The Scandvik 10187P brings a polished stainless finish to the deck side of a washdown system. It is positioned for marine deck washdowns, anchor washdown, deck cleaning, and bait wells on boats, yachts, and other marine vessels. The corrosion-resistant stainless build is useful in saltwater environments, and the Scandvik OEM component gives you a named marine brand at the outlet. Choose it when the visible end of the washdown plumbing matters as much as the function. The trade-off is that this spigot does not pump water or create pressure; it needs a feed line, and its listed price sits at the upper end of the price range.
Thru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat Plumbing
This barbed short straight thru-hull fitting is made from 316 stainless steel and comes with a custom gasket and a 316 stainless mounting nut. The polished flange gives the visible side a clean look, and the hose barb is meant for 1/2-inch I.D. marine hose. This style of fitting has been original equipment on many offshore saltwater fishing boats, which points to a saltwater-oriented stainless build. Choose it when you need a compact, polished hull pass-through for a 1/2-inch hose. The limitation is the barb size: it is specifically a 1/2-inch I.D. fitting, so larger hose lines require a different through-hull.
316 Stainless Steel 1in Thru Hull Fitting - Leak-Free Plumbing Solution
This 1-inch fitting is built from 316 stainless steel for marine water intakes, bilge pumps, and livewell installations. The solid stainless pattern brings rust, UV, and impact resistance to the part, and the listed dimensions are 1.9 x 1.9 x 2.9 inches at 8.1 ounces. Choose it when a 1-inch stainless pass-through fits your above-waterline plumbing plan. Although the title calls it a leak-free plumbing solution, the stated limit is clear: it is not recommended for use below the waterline, so this is not the fitting for a submerged hull opening.
Final recommendation by use case
- For bilge pumping or utility water transfer: TruePower 12V DC Utility Transfer Pump.
- For a polished washdown outlet on a boat or yacht: Scandvik Stainless Steel Washdown Spigot 10187P.
- For a compact hull pass-through with a custom gasket: Thru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat Plumbing.
- For an above-waterline stainless through-hull for water intakes, bilge pumps, or livewell lines: 316 Stainless Steel 1in Thru Hull Fitting - Leak-Free Plumbing Solution.
Match the part to the job: a pump moves water, a spigot delivers it, and a thru-hull fitting carries it through the boat.
