How Often to Drain the Fuel Water Separator? – Answer Revealed

Most of the time, it is essential that you drain water or fuel from your fuel water separator because water and water can accumulate inside the fuel tank and mix with water, and hence you must drain such water. It would be best if you drained the fuel water separator regularly. It will help you ensure that the accumulation of water and fuel in the separator is at the optimum level. For example, diesel is one type of fuel that absorbs most water compared to gasoline; therefore, the entire water separator used to separate the diesel will have to be drained regularly because the two liquids will accumulate into the highest level.

For this reason, most diesel vehicles must have the best and most functioning fuel water separator that will ensure that water absorbed into the fuel tank will be separated from fuel so that the water inside the fuel will affect or harm the engine. The fuel water separator is located near the fuel filter, and its only primary function is to remove the absorbed water inside the fuel tank. The fuel water separator can be installed in your car if it does have it installed. But since most fuel water separators are self-cleaning, some are not self-cleaning. Therefore you must drain them regularly.

Therefore, this article will help to know how often you have to drain your fuel water separator and how to do so. It also provides why the fuel water separator should be drained after a given period. The last part of the article is the conclusion that summarizes the article.

What happens if you don’t drain the fuel water separator?

What happens if you don't drain the fuel water separator

When you don’t drain the water that has accumulated or has been absorbed into the fuel tank, it will cause corrosion to the housing of the fuel water separator. The corrosion will spread into different parts of the care system, for example, the engine itself. Therefore, ensuring that the fuel water separator is drained and the fuel filter is free from any water molecule will help you prevent and avoid such problems and cases.

When you don’t drain, your water separator will make the fuel filters blocked by dirty water that is being absorbed into the fuel tank, which will later affect the performance of your engine. The water buildup will stop your filter from separating the harmful particle inside the fuel.When not removed from the fuel, the particles will build up in the engine and fuel system and can therefore damage such components.

The best to do away with such a problem from affecting your system is to ensure that regularly you drain the fuel water separator. Since skipping such regular maintenance of the vehicle will lead to most damages to other parts of the engine and the car in general. Another simple fix for such kinds of problems is to ensure that all the water in the fuel water separator is drained and the fuel filter change can also stop damage to the engine’s housing.

A complete water separator means that the water is now flowing into the vehicles’ fuel system and can have so many effects on the car’s system in question. When they flow into the fuel system, this water will cause corrosion throughout the entire system, including the internal transfer pump. The pump finally will rust, affecting the entire performance of your engine.

The rusty transfer pump will not work as expected to keep your fuel system, and the car’s system has the correct performance. But when the problem takes a long time in the engine’s performance, it will cause a lot of failures that later will cost one so much money when you are trying to repair the affected parts.

The primary and preventive measures on such problems are that first; you must ensure that you deal with water in your fuel system early before they accumulate into high levels that will bring a lot of problems in the performance of your engine. Secondly, ensure that you follow all the other maintenance schedules for your engine. Make sure that you replace parts that are about to be worn out and that they are replaced and fixed correctly.For example, poorly replacing a filter will cause more harm than good.

How often should you drain fuel water separator boats?

how often should you drain fuel water separator

The fuel water separator must be replaced regularly since it will ensure that the engine’s performance is as expected. It is because the fuel separator is an added item in the boat’s system, which protects the quality of your boat. Changing the filters regularly, maybe after every six months, is the best time to replace the fuel separator. A suitable fuel separator will ensure that the engine receives good and clean fuel.

You should inspect and check on the fuel vent on the side of your boat. Replace the water separator filter every 50 hours of use and empty it. After removing the filter, don’t reuse it. But if you suspect that the water has entered the fuel tank, what you have to do is to siphon off all the water from the tank and check if there is any water inside the tank.

Draining water and changing the fuel filters help improve the engine’s performance, efficiency, and power. The engine will work well when it receives clean fuel when the fuel water separator will therefore ensure that clean fuel is pumped into the fuel system. Therefore, a clean filter also means the over performance of your vehicle, including its fuel efficiency, speed, and power.

When you don’t drain your fuel water separator, it can lead to poor engine performance issues, and sometimes warnings showing check engine will show up on the dashboard. When this happens it can be a severe problem that can affect the engine and cause serious problems.

How do you drain a fuel water separator?

How do you drain a fuel water separator

Draining water is a straightforward procedure since everyone can finish the process without facing any problem. It is because it involves loosening a nut under the bowl of water. The tools that you need to have when performing the process include a torch, a spanner, and a container to collect the water. But since the space is limited, the container needs to be small so that you can collect the water quickly.

After opening the nut at the bottom of the fuel water separator, you can only collect the water, which is always smelly, and pour it away. The procedure is simple as long as you have the necessary tools to help you in the process. Draining water will help in the maintenance of your engine general.

How often should you drain your fuel filter?

How often should you drain your fuel filter

Draining a fuel filter is a crucial task for the maintenance of the car in general. Changing and draining fuel is important because it improves engine efficiency and performance. After all, excellent and clean fuel will be pumped into the fuel system. Clean fuel free from any impurities or particles will help the engine burn and have the best energy.

Changing and draining the fuel pump will depend on the fuel your vehicle is using, like diesel or gasoline. Therefore, when your car is using diesel, you should have to replace and drain the fuel filter more regularly so that it should not be clogged with choke and debris off the fuel flow. Diesel typically absorbs more water molecules. Therefore, you must regularly drain and change the fuel filter.When the diesel engine is supplied with contaminated fuel, it will affect other parts such as the injectors compared with those that use gasoline since it is cheaper to drain and replace the fuel filters than injectors or fuel pumps.

Therefore, the fuel filter is essential so that contaminated fuels and some particles are not pumped and supplied into the fuel systems.You can drain your filter after covering about 5000 miles. You can also replace the fuel filters if you don’t want to drain your filters. The best option is to replace the fuel filter since draining the fuel filters will not last long because you will be required to drain it maybe after every one month, especially if your car is using diesel.


Maintenance of the car is crucial since it helps you have an engine that will perform and work well as expected. Draining fuel water is also an essential form of engine maintenance because the fuel pumped into the fuel system will be good for the engine to run and the expected results. Draining the fuel water separator regularly is essential because it helps the fuel system supply excellent and clean fuel into the combustion chamber. 

Having clean fuel means that the efficiency and power of the engine will be at optimum. The performance given by the engine will be satisfactory when the clean fuel is pumped into the fuel system. In maintenance, it is also imperative that the fuel filters are drained and sometimes replaced so that the engine receives clean energy.

Finally, maintenance of the vehicles is not only replacing new parts but also cleaning and draining some used fuels and oils, among other things. Fuel water is an essential part of the system of your car, and if it is not installed, you need to install it because it helps maintain the engine of your car.

About Me

This is Cody Wingfield; I’m an author and a Freaky Campers enthusiast. My three favorite activities are Cycling, Rving, and Cooking for me. OutingX is a planet of mine where I will share my exploring history, story, freaky experiment, and personally gathered experience with you.

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