Thru Hull Exhaust Skin Fitting 24mm Stainless Steel - Heat Shielded

Our review of the Thru Hull Exhaust Skin Fitting finds it best for owners of diesel parking heaters who need a durable, heat-resistant exhaust adapter. The single biggest reason to buy is its construction from 316 stainless steel, which delivers strong seawater corrosion resistance and reduces risk of rust or pitting in humid or marine environments. For anyone fitting a 24mm ID exhaust hose on a boat, truck, or vehicle heater, this fitting provides a simple, robust way to increase clearance and protect surrounding materials from heat.

Key Features

• 316 stainless construction: Resists seawater corrosion and performs better than 304 stainless or iron in humid and high-temperature conditions.
• 24mm compatibility: Designed for a 24mm inner diameter hose so it mates cleanly with common diesel heater exhaust tubes.
• Heat gap design: Increases the gap between pipe and hull to act as heat insulation and reduce risk of damage to fiberglass or metal surfaces.
• Complete mounting hardware: Ships with three bolts and three nuts to simplify installation and avoid sourcing fasteners separately.
• Variety fit: Made to work with popular diesel parking heaters such as Webasto, Planar and Eberspacher style systems.
• Quality check: Each unit is checked before shipment to help ensure no deformation and consistent fit.

Who It's For

This fitting is aimed at marine and mobile users who run diesel parking heaters with a 24mm ID exhaust hose and need a corrosion-resistant through-hull solution. Boat owners installing or replacing exhaust skin fittings, overlanders adapting heater exhaust on vans, and truck operators who require a compact, heat-managing coupling will find it useful.

Those who should look elsewhere include users with nonstandard exhaust sizes (for example 22mm-only systems unless a matched size is offered) or people needing an integrated multi-piece muffler or catalytic element, since this product is a simple angled or straight skin fitting rather than a noise suppression device.

Pros & Cons

Pros

• High-grade 316 stainless steel construction provides strong corrosion resistance in marine settings.
• Specifically sized for 24mm inner diameter hoses for a reliable, leak-free fit.
• Included bolts and nuts make installation straightforward without extra hardware purchases.
• Design increases clearance to protect hull and nearby components from exhaust heat.

Cons

• Only supplied for the 24mm hose size in this listing, so buyers with other hose diameters must confirm fit or seek alternate sizes.
• The fitting is a pass-through adapter and does not include sound attenuation or additional exhaust components.

Specifications

Material	316 stainless steel
Intended hose size	24mm inner diameter
Outside diameter	24mm
Includes	1x thru hull fitting, 3x bolts, 3x nuts
Fitment	Diesel parking heaters like Webasto, Planar, Eberspacher
Finish	Polished stainless

Our Verdict

The Thru Hull Exhaust Skin Fitting is a practical, well-made option for anyone fitting a 24mm diesel heater exhaust in boats, trucks, or vans who needs corrosion resistance and heat clearance. It is good value for its material quality and included hardware, making it a sensible buy when the system requires a straightforward, durable through-hull coupling.

Frequently Asked Questions

Will this rust?
Made of 316 stainless steel, it offers strong anti-rust and abrasion resistance compared with 304 or iron in humid and marine environments.

What hose size does it fit?
The fitting is sized for a 24mm inner diameter exhaust hose and has a 24mm outside diameter to match that hose size.

What comes in the package?
The package includes the thru hull/exhaust skin fitting plus three bolts and three nuts to enable installation.