Stainless Steel 316 Straight Thru Hull Exhaust Skin Fitting for 24mm

In this review the Stainless Steel 316 Straight Thru Hull Exhaust Skin Fitting is judged as a practical, corrosion-resistant exhaust outlet for diesel parking heaters. It is aimed at boat owners and installers who need a tidy, durable passthrough for a 24mm inner diameter hose. The single biggest reason to buy is its marine grade 316 stainless construction and surface polishing, which provides reliable seawater corrosion resistance and a neat finished look that holds up in saltwater environments.

Key Features

• Fit: Designed for a 24mm inner diameter hose, it accepts common heater exhaust tubing without modification.
• Compatibility: Works with Webasto, Planar, Eberspacher and many Chinese diesel parking heaters, making it versatile for most installations.
• Material: Made from marine grade 316 stainless steel, offering excellent resistance to seawater corrosion for long service life.
• Finish: Surface polishing improves corrosion resistance and leaves a clean, low-profile exterior that looks neat on deck or hull.
• Installation: Supplied with screws and a large gasket so installers can mount it straightforwardly and achieve a sealed pass-through.

Who It's For

The fitting is best for recreational boat owners, professional installers and anyone running diesel parking heaters who needs a robust exhaust passthrough that matches standard 24mm hose. It suits users who value corrosion resistance and a polished appearance for visible hull hardware.

It is not aimed at systems that require custom or larger diameter exhaust plumbing, or installations needing integrated flame arrestors or complex muffling beyond a straight thru hull fitting. Buyers needing multiple adapters or a different hose diameter should look elsewhere.

Pros & Cons

Pros

• Solid marine grade 316 stainless construction provides durable seawater corrosion resistance.
• Fits common diesel heater brands and 24mm hose for straightforward compatibility.
• Surface polishing and good plating create a neat, attractive finished installation.
• Includes screws and a big gasket to simplify installation and sealing.

Cons

• Exhaust outlet can become very hot in use, so heat routing and clearance must be managed.
• Only fits 24mm inner diameter hose, so not suitable if your exhaust uses a different size.

Specifications

Our Verdict

The Stainless Steel 316 straight thru hull exhaust fitting is a solid, value-minded choice for boaters installing diesel parking heaters with 24mm hose. Its marine grade construction, polished finish and included gasket and screws make installation straightforward and long-lasting in saltwater. Buy this if you need a neat, corrosion-resistant exhaust passthrough that matches standard heater systems.

Frequently Asked Questions

Will this fit my diesel heater exhaust?
It fits exhaust hoses with a 24mm inner diameter and is compatible with Webasto, Planar, Eberspacher and many Chinese diesel parking heaters.

Is the fitting corrosion resistant for marine use?
Yes, it is made from marine grade 316 stainless steel and has a polished surface to resist seawater corrosion.

What hardware is included?
The package includes the straight thru hull fitting, 3 screws and 3 large gaskets for sealing during installation.