When you need thru-hull fittings for marine pumps, plumbing, or sanitation lines, the challenge is matching the connector to the opening and hose size that are already part of your boat. The four fittings in this roundup approach that in different ways, so the choice comes down to the installation style you have rather than a single general-purpose pick.
Quick take
The listed price spread runs from $10.24 to $26.99. The $26.99 price appears twice because two listings are identical injection-molded fittings. The T-H Marine fitting is listed at $17.69, and the black thru-hull connector is the lowest at $10.24. The rest of this guide maps each listing to the boat plumbing job it fits, starting with the price table below.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| T H Marine Plastic Thru Hull Fittings Durable UV Stabilized Boat Plumbing Sol | USD 17.69 | |
| Injection Molded 1/2-Inch Thru-Hull Fittings - Easy Install for Boat Plumbing | USD 26.99 | |
| Injection Molded 1/2-Inch Thru-Hull Fittings - Easy Install for Boat Plumbing | USD 26.99 | |
| thru Hull Fitting Boat Plumbing Fittings Easy to Install Premium Hose Connector | USD 10.24 |
Decision matrix
| Use case | Pick from this listing |
|---|---|
| Want a brand-name replacement part in a specific finish | T H Marine Plastic Thru Hull Fittings |
| Need a bilge-pump fitting with a 1/2-inch hose diameter | Injection Molded 1/2-Inch Thru-Hull Fittings (two listings) |
| Need a connector for a 1-1/4-inch opening | thru Hull Fitting Boat Plumbing Fittings Easy to Install Premium Hose Connector |
Product notes
T H Marine Plastic Thru Hull Fittings Durable UV Stabilized Boat Plumbing Sol
T-H Marine is the named brand in this selection, and this is the only listing offered in Black, White, and Chrome Plated-Short. The description calls out UV-stabilized plastic and marine durability, and the listing carries the MPN TH-1290-DP. That part number makes the fitting useful when you are replacing a known component rather than shopping by a generic size. The trade-off is that the listing matches by manufacturer part reference; the injection-molded entries are the ones that specify a hose diameter.
Injection Molded 1/2-Inch Thru-Hull Fittings (Listed Twice)
Both entries under this title are identical: same white color, same straight boat thru-hull bilge pump fitting as the included component, same United States country of origin, and the same listed price. The practical takeaway is that you can treat the two as duplicate copies of one product. The limitation is the duplication itself-there is no feature difference between them, and together they sit at the top of the group's listed price range. Choose one of these when you want the hose diameter stated in the title and a straight bilge-pump fitting in white.
thru Hull Fitting Boat Plumbing Fittings Easy to Install Premium Hose Connector
This listing is the only adjustable connector in the set. According to the description, it is built for 1-1/4-inch openings, adjusts from 2 inches to 4-1/2 inches, and installs by hand with threaded nuts. The material is described as PP plastic, and the color is listed as Black S. It is the right match when your boat already has a 1-1/4-inch opening and you need a connector you can turn down to fit; for a hose-side fitting that is matched by hose diameter, the other listings are the more direct pick.
Final recommendation by use case
Use the decision matrix as your shortcut. If part-number matching is the deciding factor, go with the T-H Marine fitting. If you need a straight bilge-pump fitting, pick one of the injection-molded listings. If you are working with the 1-1/4-inch opening, the thru-hull connector is the match.
