Decontaminator / Water Separator

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Decontaminator / Water Separator

Availability: In stock

The Decontaminator is available in 3 models.

  • Model FGD100 suitable for engines up to 150 bhp
  • Model FGD230 suitable for engines up to 600 bhp
  • Model FGD560 suitable for engines up to 1200 bhp

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Product Description


This Decontaminator is a simple one step unit that will remove up to 95% of solid contaminants (down to approximately 30 microns) and 100% visible water, including emulsified water that may be in the fuel.  

Using an entirely new unique filter design this system will ensure a 100% solution to the problem of water and particulate contamination in fuel.

No replacement of filter element or cartridge is required.

The Decontaminator performs this function with a reusable lifetime filter element.

Simply drain the collected water, sediments and sludge by opening the valve on the bottom of the unit. Remove the special lifetime filter element and carefully clean.

The special lifetime filter element can be cleaned very easily when blocked, just remove and gently wash with clean diesel and reinstall this operation requires no tools.

Various models are available to suit engine horse power sizes ranging from 150 HP - up to 1200 HP.


1. It will clean and improve your fuel system.

2. Extends the life of the engine, injection pump and injectors.

3. Combustion of the fuel would be much improved - which would lead to better fuel efficiency.

4. Will reduce exhaust emissions.

5. Reduces down time.

6. Will reduce consumption of standard engine fuel filters by more than 70-80%.

7. Major environmental benefit due to reduction in land fill. 

How it Works
Delivery & Returns

The estimated time of delivery, whilst given in good faith, is not the essence of the contract. Fuel-Guard shall not be liable for consequential loss or damage, in respect of delayed deliveries due to any reason, and howsoever caused.

Upon receipt of payment, goods will usually be dispatched within five working days and by the most economical means available, If you require a priority service, please contact us for a quotation. Items sent by Royal Mail are subject to Royal Mail Terms & Conditions, most importantly, this states that delivery of items sent 1st or 2nd class can take up to 15 working days.

We are not always able to dispatch same-day but will whenever possible. If we are on holiday, orders will be dealt with upon our return, a holiday notification will be displayed on our homepage whenever we are away and providing you have registered the correct email address with us, an Auto-Respond email will be sent informing you of the situation

If a product is out of stock or has to be ordered specially, then dependent upon the stock situation with the manufacturer, and the location of the manufacturer (some being overseas), delivery could take up to 6 or 8 weeks.

For this reason, if any part of your order is urgent, we encourage you to contact us to check availability prior to purchasing, we will then check stock, and if necessary contact manufacturers and provide you with an expected delivery date.


All prices exclude carriage and packing at the standard rate of £8.50+Vat for delivery to all UK mainland destinations  Scottish Highlands, Scottish Islands, Northern Ireland, IOM, IOW, Scilly Isles, and the Channel Islands will be charged at the rate of £19.50 + Vat per consignment with a weight limit 10 kilos this includes appropriate insurance to the value of the goods. It is recommended that goods are fully inspected upon delivery or signed for as unchecked. Shortages and / or transit damage must be signed for as such on the delivery paperwork, and notified in writing to us within two days of delivery. Claims beyond this period will not be accepted. Collections are not permitted.


Items returned as 'not required' will only be accepted if in new, UNUSED condition, with original, clean packaging and within manufacturers guarantee, all returns may be subject to a 25% restocking charge to cover our administration fees, we will not refund at all for any goods which have been used or soiled in any way. Items sourced to a customer’s specification cannot be returned for credit unless they are suspected to be faulty. All carriage charges must be paid for by the customer but we may reimburse these costs if the goods are faulty and within manufacturer’s warranty. Goods cannot be returned in person unless by prior arrangement. Returned items lost / damaged in transit must be claimed for by the sender.

If you have concerns about a delivery or returns please email us and we will get back to you as soon as possible


Fuel Guard - Kept me safe at sea

I bought 2 of your filters for my catamaran in Gibraltar this summer, and have to say they worked great and saved our trip to the Cape Verde. We had some bad fuel from Greece, and got a lot more in Marocco. I had to take off and clean the filters every day, but they did exactly the perfect job and without them we would never have made it to Cape Verde.

I now need some spear parts for our around the world trip, and wonder if I could get an offer from you on the following items sent to Norway addressed to boat in transit:

1 x complet filter FGD 100
1 x filter element for FGD 100
4 x o-rings/ gasket


Morten Ruud



Very  Impressed with The Fuel-Guard FGD100

One of the worst things for me is to be on my boat ready to enjoy a wonderful day  and have the engine refuse to start or cut out all because of water in the fuel or a  clogged filter, which I would  have to deal with it.  My engine has very few miles on it and regardless of additional conventional filtration products I still had problems that ended up being fuel related.

That was until I came across The Fuel Guard Decontaminator and Water Separator. I saw the demonstration on the website and I was impressed. 

After a quick phone call to Ian at Fuel Guard to discuss my problems I quickly received my filter which came complete with the correct fittings. The installation was simple and looked a quality item. This was it the moment of truth and all I can say is eureka. My problems were over, first time starts and no unscheduled stops due to contaminated fuel so enjoyable summer was had by all

Ian I would like to thank you and your fuel-Guard product for making my boating holidays enjoyable and stress free once again.


 Mike Newton

 Hartlepool / Boroughbridge Marina   



"After significant research to find an efficient and effective Fuel Filter that did not necessitate frequent element change, I came across Fuel Guard’s products. Technical support and advice, together with boundless enthusiasm and keenness to share information and experience has been very much welcomed.

The filter does exactly what is stated and needs no element replacement (saving money and the environment with no soiled filter elements for disposal). Cost effective and an excellent performer. Strongly recommended."

Tony Batchelor - AffilIIMS
Marine Consultant & Surveyor

"The Fuel-Guard 560 fuel filter has been a great asset to our diesel fuel cleaner, it has saved our customers money by reducing the amount of Racor 1000 filters that we use by around 80% in real terms this amounts to an average saving of £39.00 per fuel clean. The Fuel-Guard 560 is both easy to clean and drain and the contamination visible. Of the Fuel-Guard filters fitted to customers boats already, we have received extremely positive and glowing feedback with all customers happy to recommend their filters to others. We haven't found a down side to them yet in marine installations."

Nick Eddy FHMS

We have the FGD100 fitted onto our boat running a Yanmar engine and are very pleased with it's performance we found the filter system so simple to fit and easy to use and it certainly does what it says on the tin 'keeps our fuel dry and free from water' a great comfort when we are out at sea.


Len Pritchett  - Fishing Boat Owner


Customer Reviews 8 item(s)

Great Investment
“Having fitted a Fuel Guard filter on our domestic boiler we've now had over a year of trouble free running! Before that, every time we refilled our kerosene tank we had to then call out the boiler man to sort out blockages. Great investment and you can see the rubbish accumulating and this can easily be removed without interrupting the supply. With this recent BSS accreditation, I'm now planning to fit 3 on my boat. ”

Review by Laird 'Viking Marine' / (Posted on 19/06/2015)
Good investment it does what it says on the box - it's brilliant

NB : Slowboat 2 nowhere
Review by Dennis Shepherd / (Posted on 03/06/2015)
Superb product
We had a problem with a fast cruiser which had a very badly contaminated fuel tank that was inaccessible for cleaning (built into the hull with no access) The customer was replacing the fuel filter every five to six hours of use. The engine concerned was a 1.7 Mercruiser Diesel.
The fitting of your filter was without difficulty and has totally solved the problem.


Robert L Few Ass IIMS
Lowtown Marine Services
Review by Robert L Few / (Posted on 03/06/2015)
What a fantastic bit of kit the Fuel Guard is.
After my boat sank I had the fuel tank drained but was bothered about all the crud and dirt still being in the tank so I invested into a Fuel Guard.
It was easy to fit and the muck it is still finding is unbelievable.
I'm running a Lister ST2 which now sounds much better and has reduced the smoking by loads.
She always took a few turns to get her started but now she starts instantly.
I would highly recommend this product to anybody it is brilliant.
I have now bought the alarm system to save me having to check it.

Paul NB Manyana
Review by Manyana / (Posted on 02/06/2015)
Brilliant bit of kit.
Hi Ian nice to see you at Crick show again I bought one last year fitted it myself easy to do and a brilliant bit of kit I have recommended it to loads of boating folk.I like your new water detection system can't wait to fit mine.

Alan NB Kingfisher
Review by Alan Hardacre / (Posted on 28/05/2015)
Hi Ian it was nice to speak to you at the Crick boat show.
As mentioned I purchased a fuel-guard and had it fitted last year I am really pleased with your product with its easy to see filter, I would recommend any boater to fit a fuel-guard for peace of mind and problem free boating

Melvyn Bann May 2015

Narrow boat - 'NOWTHEN'
Review by Mervyn Bann / (Posted on 28/05/2015)
5 star Tried and Tested

I first came across this fuel filter when writing about it for the New Tech pages of MBY. The promised simplicity and ease of filter cleaning appealed to me so much that I decided to fit a pair to my Sunseeker Thunderhawk 43. My previous filters were the original MAN ones fitted to the boat when new, which were a pain when it came to changing the element. The thin rubber seal for the lower canister always seemed to pinch, resulting in a fuel leak.

The Fuel Guard FGD230 is designed so that you can easily access the filter element without any tools even when bobbing around at sea. You simply unscrew the four knobs holding down the top section of the filter assembly then pull it aside. The knobs can be unscrewed by hand, which saves fiddling around for the right spanner when time is of the essence. The super fine stainless steel mesh can then be removed and cleaned in fresh fuel or a suitable detergent before refitting it and tightening back down the top section. Water can be drained off via the tap in the bottom of the filter bowl. However, if you need to clean out the plastic bowl, you can also unscrew the four Allen bolts holding the bottom section of the filter assembly. This is a reverse of removing the top section but without the plastic knobs.

When I primed the filter for the first time, with the fuel level very low, dirt was drawn into the filter bowl. But thanks to the transparent bowl it was easy to spot and five minutes later, having drained off the fuel via the tap, I had removed the bowl, cleaned it out, and was set to go again.

Greg Copp

The stainless steel filter sifts out any nasties

BOAT MASTER TRIED & TESTED - We put the latest kit through its paces
Review by Greg Copp / (Posted on 28/11/2014)
Easy to fit and started to remove water and dirt from my fuel straight away BRILLIANT GREAT PRODUCT
Review by TUG / (Posted on 28/11/2014)