NEW ARRIVAL -17% sale
T-H Marine Qualifies for Free Shipping T-H Marine Thru-Hull 3/4
00
DAYS 00
HRS 00
MIN 00
SEC
T-H Marine T-H Marine Thru-Hull 3/4" Bulk #TH-750XL-DP $8.99 $10.73
T-H Marine TH-750XL-DP Thru-Hull FittingsThru Hull - Straight - 3/4 inch Hose - Extended- Black - Bulk PackagingT-H Marine Thru-Hull 3/4" Bulk TH-750XL-DPNormalized SKU: TH750XLDPUPC Code: 733572030051
NEW ARRIVAL -16% sale
T-H Marine Qualifies for Free Shipping T-H Marine Thru-Hull Double Nut Black 3/4
00
DAYS 00
HRS 00
MIN 00
SEC
T-H Marine T-H Marine Thru-Hull Double Nut Black 3/4" 90-Degree #TH-90-B $4.86 $5.72
T-H Marine TH-90-B Thru-Hull Fittings The T-H Marine TH-90-B is a 3/4 in. 90-degree thru-hull fitting in black, built for livewell, bilge, and aeration plumbing on bass boats and aluminum fishing rigs. The 90-degree elbow design lets you route hose runs tight to the hull without kinking, which is a real advantage in cramped compartments where a straight fitting just does not have room to work. This fitting uses a double-nut design, meaning it threads from both sides of the hull panel for a more secure, rattle-free mount compared to single-nut alternatives. It is molded from UV-stabilized virgin plastic that holds its shape and color season after season without becoming brittle or cracking under sun exposure. Consistent wall thickness from the molding process means the barb seats the hose reliably every time, no guesswork on fit. T-H Marine supplies more OEM boat builders in the U.S. than any other thru-hull brand, so there is a good chance your boat already has one of their fittings somewhere in the bilge. The TH-90-B accepts standard 3/4 in. ID hoses and installs thru-hull panels up to approximately 1 in. thick. A flat-head profile on the exterior keeps the fitting low-profile and snag-free on the hull surface. Normalized SKU: TH90BUPC Code: 733572015331
NEW ARRIVAL -17% sale
T-H Marine Qualifies for Free Shipping T-H Marine Thru-Hull Black 1-1/2 T-H Marine Qualifies for Free Shipping T-H Marine Thru-Hull Black 1-1/2
00
DAYS 00
HRS 00
MIN 00
SEC
T-H Marine T-H Marine Thru-Hull Black 1-1/2" #TH-1500-DP $10.29 $12.28
T-H Marine TH-1500-DP Thru-Hull FittingsThe T-H Marine TH-1500-DP is a 1-1/2 in. straight thru-hull fitting in black, sized for higher-flow applications like bilge pump discharge, livewell drain, and aeration plumbing on bass boats, fiberglass hulls, and aluminum fishing rigs. At 1-1/2 in., this is one of the larger common thru-hull sizes, so it is typically found on setups where moving water fast matters more than saving space.The fitting is molded from UV-stabilized virgin plastic, which keeps it from going chalky or brittle after a few seasons baking in the sun. The hose barb is sized to grip 1-1/2 in. ID hose firmly without needing extra clamps to keep things snug, though a stainless clamp is never a bad idea on a discharge line. The single-nut design threads through the hull panel from the outside and locks down from the interior, giving you a watertight seal against the hull surface.T-H Marine is the go-to thru-hull supplier for more U.S. OEM boat builders than any other brand, and the TH-1500-DP shows up on a wide range of production boats straight from the factory. If you are replacing an existing fitting or upgrading a plumbing run, this is a reliable, direct-fit option that installs without drama.Normalized SKU: TH1500DPUPC Code: 733572031003
NEW ARRIVAL -17% sale
T-H Marine Qualifies for Free Shipping T-H Marine Directional Flow HD 3/4
00
DAYS 00
HRS 00
MIN 00
SEC
T-H Marine T-H Marine Directional Flow HD 3/4" #DAHIK-750-DP $15.50 $18.50
T-H Marine DAHIK-750-DP Thru-Hull Fittings The T-H Marine DAHIK-750-DP is a 3/4 in. heavy-duty directional flow aerator spray head designed for baitwells and livewells on bass boats and fishing rigs. It threads onto a standard 3/4 in. hose barb and directs water flow in a controlled circular pattern along the interior wall of the well, which keeps baitfish moving, reduces crowding at the surface, and improves oxygen distribution throughout the water column. The low-profile, rounded head design minimizes contact injury to delicate bait like shad and threadfin, which are notoriously fragile and quick to die in a poorly circulated well. The directional angle lets you aim the flow to create a consistent current rather than a random spray, which makes a real difference in bait survival on long tournament days. Available in 90-degree and 45-degree configurations for installation above or below the waterline depending on your plumbing layout. This is a direct upgrade from standard straight spray heads and fits the same 3/4 in. hose connections used on most factory livewell and baitwell pump systems. If your bait is dying faster than it should, the spray head is often the first thing worth checking. Creates a strong directional flow of water to help baitfish breathe easier in harsh conditions Available in 90-degree and 45-degree options for versatile installation above or below the waterline Low profile, rounded design minimizes injury to delicate bait while fitting standard 3/4" hoses Normalized SKU: DAHIK750DPUPC Code: 733572001457
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Large Black 3-pk #520849-1 $58.92 $70.70
Sea-Dog 520849-1 Thru-Hull FittingsSea-Dog Dripper Guard Large Black 3-pk #520849-1Normalized SKU: 5208491UPC Code: 035514522779
-20% sale
00
DAYS 00
HRS 00
MIN 00
SEC
GROCO GROCO 316 Stainless Steel Fitting with Locknut #TH-2000-CS $77.59 $96.32
GROCO TH-2000-CS Thru-Hull Fittings#316 SS FITTING W/LOCKNUTNormalized SKU: TH2000CS
-17% sale
Whitecap Qualifies for Free Shipping Whitecap Black Nylon Splash Guard #SG-2
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap Black Nylon Splash Guard #SG-2 $10.80 $12.89
Whitecap SG-2 Thru-Hull Fittings The Whitecap SG-2 is a black nylon splash guard designed to mount over thru-hull fittings on the exterior of a boat hull. Its job is straightforward: keep water from sheeting directly into the thru-hull opening while the boat is underway or sitting in a chop. The curved guard deflects water away from the fitting, which reduces the chance of water intrusion and keeps the fitting cleaner over time. Nylon construction keeps it light and corrosion-proof. It will not rust, pit, or degrade from salt water exposure the way metal alternatives can, and the black finish holds up to UV without fading quickly. It mounts with five 5/32-inch fasteners, so installation is straightforward against a flat or moderately curved hull surface. The 1-1/4-inch opening diameter fits over standard thru-hull fittings in that size range. At 7-3/4 inches long and 4-1/4 inches wide, the guard covers a meaningful area around the fitting without being oversized or awkward on the hull. Material: black nylon Overall length: 7-3/4 inch Overall width: 4-1/4 inch Opening diameter: 1-1/4 inch Fastener size: 5/32 inch (9 fasteners) Application: exterior hull thru-hull fitting protection Normalized SKU: SG2
-17% sale
Whitecap Qualifies for Free Shipping Whitecap SS Plastic 2 Whitecap Qualifies for Free Shipping Whitecap SS Plastic 2
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS Plastic 2" Thru-Hull with Barb #S-3806C $40.38 $48.46
Whitecap S-3806C Thru-Hull Fittings The Whitecap S-3806C is a 2-inch thru-hull fitting that combines a 316 stainless steel body with nylon components, giving you corrosion resistance where it counts without going full stainless on every piece. It is built for marine use, which means it is designed to sit below or at the waterline and keep doing its job in the kind of wet, salty conditions that eat through lesser hardware over time. The hose barb end accepts a 2-inch hose and holds it securely without relying entirely on the clamp to do all the work. The barb geometry creates a mechanical grip on the hose that stays put even with vibration and pressure changes. Installation requires a 2-1/16-inch cutout in the hull, and the fitting handles hulls up to 2 inches thick, so it works in both thin fiberglass and heavier composite construction. The 3-1/4-inch flange sits flush against the hull exterior and distributes load across a wider surface area than a bare nut would. That matters for long-term watertight integrity, especially in hulls that flex underway. Hose barb size: 2 inch Material: 316 stainless steel body with nylon components Flange O.D.: 3-1/4 inch Thread length: 1-7/8 inch Barb length: 1-3/4 inch Overall length: 5 inch Hull cutout size: 2-1/16 inch Maximum hull thickness: 2 inch Normalized SKU: S3806CUPC Code: 725060380618
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap Lack Nylon Splash Guard #EF-SGB $9.41 $11.23
Whitecap EF-SGB Thru-Hull FittingsWhitecap Lack Nylon Splash Guard #EF-SGBNormalized SKU: EFSGB
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS Nylon Scupper 2" with Barb #6561C $53.30 $63.95
Whitecap 6561C Thru-Hull FittingsWhitecap SS Nylon Scupper 2" with Barb #6561CNormalized SKU: 6561C
-20% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS 1-1/2" x 3-1/8" Thru-Hull with Barb #6545X $107.60 $133.58
Whitecap 6545X Thru-Hull FittingsWhitecap SS 1-1/2" x 3-1/8" Thru-Hull with Barb #6545XNormalized SKU: 6545XUPC Code: 725060654535
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS 1-1/8" x 2-1/2" Thru-Hull with Barb #6543X $72.98 $87.57
Whitecap 6543X Thru-Hull FittingsWhitecap SS 1-1/8" x 2-1/2" Thru-Hull with Barb #6543XNormalized SKU: 6543XUPC Code: 725060654337
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS 1" x 2-1/2" Thru-Hull with Barb #6542X $68.58 $82.30
Whitecap 6542X Thru-Hull FittingsWhitecap SS 1" x 2-1/2" Thru-Hull with Barb #6542XNormalized SKU: 6542XUPC Code: 725060654238
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS 3/4" x 2-1/2" Thru-Hull with Barb #6541X $60.11 $72.13
Whitecap 6541X Thru-Hull FittingsWhitecap SS 3/4" x 2-1/2" Thru-Hull with Barb #6541XNormalized SKU: 6541XUPC Code: 725060654139
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Whitecap Whitecap SS 5/8" x 2-1/4" Thru-Hull with Barb #6540X $43.34 $52.00
Whitecap 6540X Thru-Hull FittingsWhitecap SS 5/8" x 2-1/4" Thru-Hull with Barb #6540XNormalized SKU: 6540XUPC Code: 725060654030
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Small 3-pk Black #520847-1 $53.28 $63.94
Sea-Dog 520847-1 Thru-Hull FittingsSea-Dog Dripper Guard Small 3-pk Black #520847-1Normalized SKU: 5208471UPC Code: 035514522755
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Small 3-pk White #520846-1 $53.28 $63.94
Sea-Dog 520846-1 Thru-Hull FittingsSea-Dog Dripper Guard Small 3-pk White #520846-1Normalized SKU: 5208461UPC Code: 035514522748
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Large Black #520843-1 $18.74 $22.37
Sea-Dog 520843-1 Thru-Hull FittingsSea-Dog Dripper Guard Large Black #520843-1Normalized SKU: 5208431UPC Code: 035514522649
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Large White #520842-1 $18.74 $22.37
Sea-Dog 520842-1 Thru-Hull FittingsSea-Dog Dripper Guard Large White #520842-1Normalized SKU: 5208421UPC Code: 035514522632
-17% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Dripper Guard Small Black #520841-1 $18.76 $22.39
Sea-Dog 520841-1 Thru-Hull FittingsSea-Dog Dripper Guard Small Black #520841-1Normalized SKU: 5208411UPC Code: 035514522625

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

  • Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
  • Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
  • Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
  • Hazardous Item - Not Qualified for Free Shipping: This item is hazardous and does not qualify for free shipping
  • Truck Freight - Not Qualified for Free Shipping: This item has to be shipped via truck freight. Please contact us for a quote
  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

We offer a hassle-free return policy. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

Free Shipping

On most orders $149+ to the continental 48 US states.

Secure Shopping

Fast, secure checkout with a variety of payment methods.

Shop with confidence

25+ years serving the marine industry.

Support center

Need help? Contact us via live chat, phone, or email.

© 2026 First Choice Marine.