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Marine Plumbing Fittings: Choose the Right Thru-Hull, Elbow, or Strainer

Compare four marine plumbing fittings, from a $8.99 90-degree thru-hull to a $145.52 seawater intake strainer, and find the right match for your hose size.

Last updated Aug 17, 2026

Choosing the right marine plumbing fitting isn't just about grabbing the first brass or plastic piece you see. You need to match the fitting type to the hose size, the angle of the run, and whether the part is a simple elbow, a thru-hull, or a component like a seawater strainer. These four listings cover different roles and price points, from a low-priced 90-degree thru-hull to a much higher-priced strainer, so the decision comes down to your specific installation and the size of hose you're working with.

Quick Take

These four marine fittings cover different jobs: a 90-degree thru-hull, brass street elbows, a straight stainless steel thru-hull, and a seawater strainer. The first two are priced under $10, the stainless steel fitting sits in the middle, and the strainer carries the highest price in this group. Start by matching the fitting type to your boat's hose and plumbing need.

Price at a Glance

ProductListed PriceRelative Price
Marine/Boat 90 Degree Thru HullUSD 8.99
STREET ELBOW BRASS SET OF 5USD 9.98
Thru Hull Stainless Steel StraightUSD 28.85
Marine Water Intake StrainerUSD 145.52

Decision Matrix

ProductKey FeatureBest FitPrice Level
Marine/Boat 90 Degree Thru Hull90-degree polypropylene thru-hullThru-hull install with a turnLow
STREET ELBOW BRASS SET OF 5Brass street elbowsMultiple identical elbow connectionsLow
Thru Hull Stainless Steel Straight316 stainless steel straight thru-hullStraight thru-hull for saltwater boat useMid
Marine Water Intake StrainerSeawater intake strainerSeawater intake strainer plumbingHigh

The matrix gives you a fast read on which fitting type matches your project. The notes below call out the specifics you'll want before ordering.

Product Notes

Marine/Boat 90 Degree Thru Hull

Marine/Boat 90 Degree Thru Hull Plumbing Fitting for 3/4" Hose

For someone installing a thru-hull at a 90-degree angle, this is the direct option. The product description highlights UV and chemical resistant virgin polypropylene, and the listing includes a 1-year warranty. The price listed is USD 8.99, making it the least expensive item in this set of four. The intended hose size is 3/4", so that's the size you'd need to work with for this fitting to make sense. The description also mentions a finished head and a single pass-around nut, which tells you the basic hardware is part of the package. The trade-off is the material: it's polypropylene rather than metal, so if your installation specifically calls for brass or stainless steel, this won't be the match.

STREET ELBOW BRASS SET OF 5

STREET ELBOW BRASS PLUMBING FITTING SET OF (5) MALE / FEMALE 1 1/8" X 5/8" BOAT

This set of brass street elbows is useful when you need several of the same elbow size at once. The description gives the rough measurements: 1 1/8" length, 5/8" width, with a 1/2" female inside diameter and 3/8" male inside diameter. The condition is listed as new other, which means the packaging may show wear, but the pieces are still new. If the hose connections in your boat match those ports, the set gives you multiple elbows for a low total price. Because all elbows in the set are the same size, it's best suited for a job where you need repeat connections rather than a mix of sizes.

Thru Hull Stainless Steel Barbed Short Straight

Thru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat Plumbing

This is the straight-shooter of the group. It's a short straight thru-hull, not a 90-degree, and the description says it's made from 316 stainless steel with a highly polished flange. A custom gasket and a 316 stainless mounting nut are included. It's designed for 1/2" I.D. hose, and the description mentions offshore saltwater fishing boats, which gives a sense of the intended setting. At USD 28.85, the price sits between the low-cost fittings and the strainer. The limitation is that it's specifically a straight fitting for 1/2" hose, so if you need a bend or a larger hose, this isn't the part for that job. For a straight 1/2" pass-through, the stainless material and included gasket make it a solid option.

Marine Water Intake Strainer

Marine Water Intake Strainer Seawater Boat Plumbing Fittings

This is the only item among the four whose title explicitly says "water intake strainer." It's listed at USD 145.52, which is well above the other three fittings. The brand is Eurowagens, and the listing includes a 12-month warranty and describes the quality as premium aftermarket. If your boat needs a seawater strainer rather than a simple thru-hull or elbow, this is the part that matches that purpose. The price is the main constraint, especially since the other three choices are all under $30 in these listings. When a strainer is required, this is the one in the group that directly addresses it, but it costs much more than the other fittings.

Final Recommendation by Use Case

If the job is a 90-degree thru-hull for a 3/4" hose, the Marine/Boat 90 Degree Thru Hull Fitting is the most direct match. If you're stocking up on brass elbows, the street elbow set covers a single-size connection with multiple pieces. For a straight 1/2" hose in a saltwater setting, the stainless steel straight thru-hull is the material match. And when the task calls for a seawater intake strainer, the Eurowagens strainer is the one that fits that role, despite its higher price.

Products in this article
STREET ELBOW BRASS PLUMBING FITTING SET OF (5) MALE / FEMALE 1 1/8" X 5/8" BOATUSD 9.98View on eBayMarine/Boat 90 Degree Thru Hull Plumbing FittingUSD 8.99View on eBayMarine Water Intake Strainer Seawater Boat Plumbing FittingsUSD 145.52View on eBayThru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat PlumbingUSD 28.85View on eBay
STREET ELBOW BRASS PLUMBING FITTING SET OF (5) MALE / FEMALE 1 1/8" X 5/8" BOATUSD 9.98View on eBayMarine/Boat 90 Degree Thru Hull Plumbing FittingUSD 8.99View on eBayMarine Water Intake Strainer Seawater Boat Plumbing FittingsUSD 145.52View on eBayThru Hull Stainless Steel Barbed Short Straight Custom Gasket Boat PlumbingUSD 28.85View on eBay

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