20 Best Thru Hull Exhaust Flappers [2024]

Are you looking for the best Thru Hull Exhaust Flappers? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Thru Hull Exhaust Flappers.

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# Preview Product
1 2' Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers 2" Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers
2 Centek Industries 3.00 Thru Hull Blk W/Flapper Centek Industries 3.00 Thru Hull Blk W/Flapper
3 for Stainless Steel and Plastic Thru Hull scuppers z for Stainless Steel and Plastic Thru Hull scuppers z
4 1-7/16' Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers 1-7/16" Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers
5 Southco Boat Exhaust Thru Hull M7-05-9205770 | 2 1/2 Inch w/Flap Southco Boat Exhaust Thru Hull M7-05-9205770 | 2 1/2 Inch w/Flap
6 VTurboWay Stainless Steel 316 Straight Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket... VTurboWay Stainless Steel 316 Straight Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket...
7 VTurboWay Stainless Steel 316 Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket Hardware, for... VTurboWay Stainless Steel 316 Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket Hardware, for...
8 1-3/4' Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers 1-3/4" Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers
9 Seachoice 28351 Exhaust Guard Covers – Fits 3 Inch OD Pipe – Black Rubber with Stainless Steel... Seachoice 28351 Exhaust Guard Covers – Fits 3 Inch OD Pipe – Black Rubber with Stainless...
10 TINGZHIGO Straight Thru Hull Exhaust Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316 Stainless... TINGZHIGO Straight Thru Hull Exhaust Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316...
11 TruPlug - The Necessary Alternative to Wooden Emergency Plugs TruPlug - The Necessary Alternative to Wooden Emergency Plugs
12 Exhaust Thru-Hull 3 Ss - Seadog Line Exhaust Thru-Hull 3 Ss - Seadog Line
13 ISURE MARINE Stainless Steel Barbed Standard Length Straight Thru-Hull Marine Barbed Hose Thru Drain... ISURE MARINE Stainless Steel Barbed Standard Length Straight Thru-Hull Marine Barbed Hose Thru...
14 marine stainless steel 316L 24mm Thru Hull/Exhaust Skin Fitting var1 for Webasto, Planar,... marine stainless steel 316L 24mm Thru Hull/Exhaust Skin Fitting var1 for Webasto, Planar,...
15 T-H Marine FSRK-3-DP Scupper Flapper Repair Kit - Black T-H Marine FSRK-3-DP Scupper Flapper Repair Kit - Black
16 TINGZHIGO Thru Hull Exhaust Skin Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316 Stainless... TINGZHIGO Thru Hull Exhaust Skin Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316 Stainless...
17 316L 24mm Thru Hull/Exhaust Skin Fitting with Back Plate Marine Stainless Steel Stainless Steel for... 316L 24mm Thru Hull/Exhaust Skin Fitting with Back Plate Marine Stainless Steel Stainless Steel...
18 White Water 6656N-SCP Nylon Thru Hull Scupper, 1-1/2' Hose, 2-3/16' Cutout White Water 6656N-SCP Nylon Thru Hull Scupper, 1-1/2" Hose, 2-3/16" Cutout
19 Marine Part Depot Stainless Steel Thru-Hull with Mushroom Head, Barbed 1/2' Marine Part Depot Stainless Steel Thru-Hull with Mushroom Head, Barbed 1/2"
20 Straight Exhaust Fitting 22, 24, 30 mm/Thru Hull for Webasto Eberspacher Planar Chinese heaters (24... Straight Exhaust Fitting 22, 24, 30 mm/Thru Hull for Webasto Eberspacher Planar Chinese heaters...
Bestseller No. 1
2" Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers
  • 2" Scupper Flapper Kit
  • Includes flapper, mounting wedge, and machine screw
Bestseller No. 2
Centek Industries 3.00 Thru Hull Blk W/Flapper
  • 3.00 THRU HU
  • CENTEK
  • Engine
  • Transom Exhaust Fittings
  • 1200299
Bestseller No. 3
for Stainless Steel and Plastic Thru Hull scuppers z
  • 1-5/8" Scupper Flapper Kit
  • Includes flapper, mounting wedge, and machine screw
  • If your scupper is fine, why replace the whole thing?
Bestseller No. 5
Southco Boat Exhaust Thru Hull M7-05-9205770 | 2 1/2 Inch w/Flap
  • Manufacturer: Southco; Manufacturer Number: M7-05-9205770
  • Material: 316 Stainless Steel; Overall Dimensions: 4 3/4" OD (flange) x 5 3/4" H
  • Cutout: 3 1/2" Dia.; Hose Connections: 2 1/2" Dia. Barbed; Max Hull Thickness: 1 1/2"
  • Sold as seen in pictures; Note every computer shows colors differently; All measurements are approximate; Hardware and instruction/installation manual...
Bestseller No. 6
VTurboWay Stainless Steel 316 Straight Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket...
  • Fit for 24mm inner diameter hose pipe
  • Fit for Webasto, Planar, Eberspacher, Chinese Diesel Parking heaters var4
  • Surface polishing,corrosion resistance and durability in the saltwater environment
  • Made of Marine grade 316 stainless steel, Excellent seawater corrosion resistance and durable
  • Easy installation With screws and Big Gasket
Bestseller No. 7
VTurboWay Stainless Steel 316 Thru Hull Exhaust Skin, Fitting 24mm Tube Pipe Socket Hardware, for...
  • Fit for 24mm inner diameter hose pipe
  • Fit for Webasto, Planar, Eberspacher, Chinese Diesel Parking heaters var4
  • Surface polishing,corrosion resistance and durability in the saltwater environment
  • Made of Marine grade 316 stainless steel, Excellent seawater corrosion resistance and durable
  • Easy installation With screws and Big Gasket
Bestseller No. 8
1-3/4" Replacement Flapper for Stainless Steel and Plastic Thru Hull scuppers
  • 1-3/4" Scupper Flapper Kit
  • Includes flapper, mounting wedge, and machine screw
  • 1-3/4" diameter flapper
  • In stock in Florida!
Bestseller No. 9
Seachoice 28351 Exhaust Guard Covers – Fits 3 Inch OD Pipe – Black Rubber with Stainless Steel...
  • Prevent water from rushing in through exhaust thru-hulls when stopping or moving slowly
  • Black rubber with adjustable stainless-steel hose clamp
  • Fits 3 inch outer diameter (OD) exhaust pipe
  • Weather-resistant rubber flapper valve
  • Pack of 2 exhaust guard covers with clamps
Bestseller No. 10
TINGZHIGO Straight Thru Hull Exhaust Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316 Stainless...
  • 【Question: Will it rust? Answer: No】:TINGZHIGO Straight Thru Hull/Exhaust Fitting is made of 316 stainless steel. In humid air or high-temperature...
  • 【How to choose the right size?】: A very complete solution for all heater systems with 24mm ID exhaust. 24mm outside diameter, fit for 24mm inner...
  • 【Why choose Thru Hull Exhaust Fitting ?】: Increase the gap between the pipes, which can play the role of heat insulation, to prevent damage to the...
  • 【What is in the package?】:1x thru hull/exhaust fitting,3x bolts,3x nuts. We provide bolts for you to install. (Bolts are made of 316 stainless...
Bestseller No. 11
TruPlug - The Necessary Alternative to Wooden Emergency Plugs
  • High performance, industrial grade foam plug designed for harsh marine environments
  • Conforms to the irregular and unpredictable shapes of most hull breaches
  • Adapts to round holes or elongated tears to slow or stop leaks
  • Easily compressed by hand or cut to fit
  • Essential in every damage control kit for the safety of your vessel
Bestseller No. 13
ISURE MARINE Stainless Steel Barbed Standard Length Straight Thru-Hull Marine Barbed Hose Thru Drain...
  • ✔Standard Thread has full length thread for thick hulls and easy tightening;Inner Dia. 1''
  • ✔Material: High quality and purity 316 Stainless Steel, Surface: Mirror polished/High polish finish
  • ✔Overall Length: 101 mm, Thread length: 53mm, Barb length: 1-1/2", Hole diameter: 1" 25.4 mm
  • ✔Outside flange diameter: 2-1/5"(56mm), Barb diameter: 25.4 mm / 1'', Thread Size: 33mm , Weight: 330 g
  • ✔RISK-FREE purchase! If you have any issues ,please feel free to contact us. 24-Hour Customer Supports.
SaleBestseller No. 14
SaleBestseller No. 15
T-H Marine FSRK-3-DP Scupper Flapper Repair Kit - Black
  • Constructed of thermoplastic elastomer
  • Do not curl like rubber flappers
  • Repairs most scuppers with flappers, regardless of manufacturer
  • Kit contains all parts needed to repair 2 scuppers
  • Each kit contains 2 each of: 1 1/2"flappers and 1 3/4" flappers, and all necessary keepers and fasteners
SaleBestseller No. 16
TINGZHIGO Thru Hull Exhaust Skin Fitting, Fit for 24mm Inner Diameter Hose Pipe, 316 Stainless...
  • 【Question: Will it rust? Answer: No】:TINGZHIGO Thru Hull/Exhaust Skin Fitting is made of 316 stainless steel. In humid air or high-temperature...
  • 【How to choose the right size?】: A very complete solution for all heater systems with 24mm ID exhaust. 24mm outside diameter, fit for 24mm inner...
  • 【Why choose Thru Hull Exhaust Skin Fitting ?】: Increase the gap between the pipes, which can play the role of heat insulation, to prevent damage...
  • 【What is in the package?】:1x thru hull/exhaust skin fitting,3x bolts,3x nuts. We provide bolts for you to install. (Bolts are made of 316...
Bestseller No. 18
White Water 6656N-SCP Nylon Thru Hull Scupper, 1-1/2" Hose, 2-3/16" Cutout
  • A) 1-1/2" B) 3-1/4" C) 5" D) 2-3/16" E) 2-1/2" Thread: 1-1/2”-11.5NPS
  • Sold by each
  • The black rubber flap automatically closes to prevent incoming backwash.
  • Scupper body is made of marine grade nylon helping to withstand hose flexing. Nylon is naturally corrosion resistant. Adding sealant to the flange...
  • A barbed end accepts multiple hose clamps.
Bestseller No. 19
Marine Part Depot Stainless Steel Thru-Hull with Mushroom Head, Barbed 1/2"
  • stainless steel thru-hull with mushroom head, barbed 1/2"

Having trouble finding a great Thru Hull Exhaust Flappers?

This problem is well understood by us because we have gone through the entire Thru Hull Exhaust Flappers research process ourselves, which is why we have put together a comprehensive list of the best Thru Hull Exhaust Flapperss available in the market today.

After hours of searching and using all the models on the market, we have found the best Thru Hull Exhaust Flappers for 2023. See our ranking below!

How Do You Buy The Best Thru Hull Exhaust Flappers?

Do you get stressed out thinking about shopping for a great Thru Hull Exhaust Flappers? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Thru Hull Exhaust Flappers, which is why we have assembled a comprehensive list of the greatest Thru Hull Exhaust Flappers available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Thru Hull Exhaust Flappers that you consider buying. Your questions might include the following:

  • Is it worth buying an Thru Hull Exhaust Flappers?
  • What benefits are there with buying an Thru Hull Exhaust Flappers?
  • What factors deserve consideration when shopping for an effective Thru Hull Exhaust Flappers?
  • Why is it crucial to invest in any Thru Hull Exhaust Flappers, much less the best one?
  • Which Thru Hull Exhaust Flappers are good in the current market?
  • Where can you find information like this about Thru Hull Exhaust Flappers?

We’re convinced that you likely have far more questions than just these regarding Thru Hull Exhaust Flappers, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Thru Hull Exhaust Flappers, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Thru Hull Exhaust Flappers. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Thru Hull Exhaust Flappers buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Thru Hull Exhaust Flappers currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Thru Hull Exhaust Flappers has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Thru Hull Exhaust Flappers?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Thru Hull Exhaust Flappers.
  5. Customer Ratings: Number ratings grade Thru Hull Exhaust Flappers objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Thru Hull Exhaust Flappers.
  7. Product Quality: You don’t always get what you pay for with an Thru Hull Exhaust Flappers, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Thru Hull Exhaust Flappers is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Thru Hull Exhaust Flappers information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

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FAQ:

Q: Do flaps on a thru hull exhaust really keep the water out?

A: Those flaps are effective when you back up. Then they will close to stop the major rush of water from going in the pipes. Re: Do flappers on a thru hull exhaust really keep the water out? When running, the engine exhaust pressure will keep water out.

Q: Does my exhaust have a flapper on it?

A: It should have internal OR external flappers, which are not to be confused with shutters. Flappers are found on setups where the exhaust pipe is coming right off and down from the riser/elbow and straight out the transom, to a tip. It’s the tip that will have the flapper.

Q: Why choose Hardin marine exhaust flappers?

A: Due to the popularity of these Hardin Marine handcrafted beautifully polished stainless steel exhaust flappers they have created the option for larger versions. The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.

Q: What are the flaps on a 316L exhaust?

A: These high polished 316L stainless steel external flaps are designed to slides over an existing 4″ straight cut tip and provide the security of a secondary or even primary exhaust flapper. Sold in pairs. Linkage replacement kit that repairs or replaces components that connect the solenoids (#270-10871) to the shafts.