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Frequently Asked Questions

What does a Lloyd's register approval mean?

A Lloyd's Register Type Approval mark on a product provides users with an assurance that the manufacturer's claims have been verified. Lloyd's Register Type Approval is an impartial certification service, which is available for a wide range of products used in marine and offshore applications, industrial plants and processes, and the IT sector.

A Lloyd's Register Type Approval mark:

  • provides unbiased, third-party verification of the product's conformity with the manufacturer's specifications, and national and international standards;
  • assists in ensuring that an appropriate level of product safety is achieved, inspiring confidence among users; and
  • enables manufacturers to use the mark - a special symbol of approval - on packaging, in promotional material or on the product itself.

For more information, see:


What is the difference between a viton o ring and a rubber o ring?

Typically, viton o rings are a longer lasting, heavy duty o ring that is resistant to a wide range of chemicals, petroleum products and solvents. Standard black rubber o rings tend to not last as long and even begin to break down when in contact with petroleum products and some chemicals.

All MW fuel fittings and MW's fuel filter clear bowl are fitted with viton o rings. This gives the user with the best possible seal in the harsh marine environment.

Viton o rings are even safe to use with E10 ethanol fuels.

What is electrolysis and how does it occur?

Electrolysis is a reaction caused by two dissimilar metals being in contact with each other. In the marine industry, this occurs commonly where stainless steel fittings are used on aluminium boats. Over time a reaction takes place, causing the aluminium to corrode.

This can be prevented by isolating the products from one and other with the use of a jointing compound (such as Duralac).

What colour rollers should I use on my trailer?

Trailer rollers are sold in a variety of shapes, sizes, colours and materials. Each material has its own specific use.

  • polyethylene rollers usually coloured blue, are hard and suitable for use with aluminium boats;
  • polyurethane rollers, usually coloured red, are a softer compound and suitable for use with the more fragile fibreglass hulls; and
  • rubber, usually coloured black, is multi-purpose option. It can be used on both aluminium and fibreglass hulls. However, it is usual for rubber to wear more quickly than both polyurethane and polyethylene rollers.

Should my boat trailer have brakes?

Whether to install brakes on the wheels of a trailer depends on how heavy the trailer and boat are when fully loaded.

This information should be supplied on the manufacturer's plate attached to the trailer.

Braking requirements vary with axle amount and weight. The following is a guide:

  • single axle trailers with a 0.75T GTM - no brakes required;
  • single and dual axle trailers between 0.75T and 2T GTM should have an efficient braking system installed on at least on of the axles;
  • dual and triple axle trailers between 2T and 3.5T GTM require brakes on all wheels and must be able to be operated from the driver's seat. They also require a breakaway system to be installed, which will apply the brakes for at least 15 minutes if the trailer is detached from the tow vehicle.

What does "'72 COLREG's" mean?

The International Regulations for Preventing Collisions at Sea (or commonly referred to as the '72 COLREG's) are a set of rules designed to govern the movement of all vessels.

These rules incorporate navigational aids and markers and the approval status of navigational lights.

Why should tinned copper wire be used in the marine environment?

Tinned copper wire has the ability to resist corrosion better than plain copper wire.

This enables the electrical circuits in an around your boat or watercraft to be more reliable and last for a longer period of time than circuitry with plain copper wiring.

Why are LED (Light Emitting Diode) lights better to use than incandescent bulbs?

LED's have significant advantages over the older style of incandescent bulb available.

Most LED's have a working life of up to 100,000 hours. Also, due to their comparatively low current draw, there are real savings in the cost of power consumption when operating LED's compared with traditional incandescent bulbs.