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Oil Tank Sponge (absorbs 0.7L water)

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£31.00 Ex VAT£37.20 Inc VAT


Oil Tank Sponge – AC.STMP.TS

Oil The Tank Sponge is designed to remove water contamination from the base of vented heating oil tanks which are prone to the collection of water, specifically from condensation and atmospheric moisture.

The device consists of a specially moulded cage made from recycled plastic, which is also recyclable. The cage is hinged and designed to hold replaceable Tank Sponge sock inserts, each of which will soak up to 700ml (0.7 litres) of contaminated water from the bottom of your oil tank, whilst not soaking up any of the heating oil.

Each cage is tested to be used more than 1,000 times, but should your cage get damaged in anyway, our Lifetime Guarantee means that we will replace it, for free – whatever the problem.

The Tank Sponge package includes a single, reusable cage along with two inserts, enough to trap 1.4 litres of water. When the insert swells and fills the cage, simply remove the insert via the string which is attached to each one, open the cage using the biodegradable gloves which are shipped with the device, dispose of the water filled insert and replace with a fresh, dry unit. Close the cage and ensure that the clips are fastened, then lower the cage and insert back into the heating oil tank, tying off the string outside of the tank, ready to be used to check the device every few months.

This Tank Sponge version is now manufactured with no single use plastic – The cage is from recycled plastic and could be recycled if required. The insert and retrieval sting is made from cotton. The product is boxed in recycled cardboard and the enclosed glove is biodegradable.

How much water will the Tank Sponge remove from my tank?
The sock will absorb up to 700ml of contaminated water in each fresh insert.

How long should I leave in between checking?
This depends on the environment – Spring and Autumn see the highest level of condensation from large temperature shifts day and night. A single skinned tank will also suffer more than a bunded (twin skinned) tank. The Tank Sponge should really be checked each time a fuel delivery is made – if required, a nw insert should be used and the old insert disposed of.

Can I throw my water filled insert into my domestic bin?
There is no reason, subject to local restrictions, not to include your used insert into the domestic waste. Over 95% of the volume will be water, and only a minimal volume of oil will be soaked in the cotton fabric. You must wear protective gloves when handling any heating oil contaminated items.

Will my oil delivery driver take my used device away?
In most cases yes, but please check with your distributor.

How can I get a replacement cage if mine is damaged?
Just contact Atlantis Tanks, let us know what is wrong with the cage and we will pop a new one in the post, with no charge.

Why is there water in my tank, did it come from the fuel delivered to me?
Assuming you have purchased from a reputable oil distributor, who will be a member of the Federation of Petroleum Suppliers (FPS), you can be sure that the fuel delivered will be of the highest quality and the same specification as when it was delivered from the refinery. The water in the bottom of oil tanks generally enters the tank from the breather pipe, which is open to the atmosphere. The main problem is condensation that forms when the fuel cools overnight, and then the tank warms in sunshine during the day. The difference in temperature creates condensation which then collects at the bottom of the tank. In cases where the lid of the tank is damaged, significant amounts of water will enter the tank, often very quickly and cause significant problems.

What problems does water in my tank cause?
Whilst it is inside a plastic tank, really very little, but when the level of water reaches the fuel outlet and starts to run into the fuel lines and the boiler, water can cause major damage to the pipeline and the burner. Not only can the water directly damage the boiler, which can be very expensive to repair, the water in the fuel lines is highly likely to freeze in the winter and cause the heating system to fail. This problem is also often triggered when a fresh delivery of fuel stirs up any contaminated water at the bottom of the tank, hence problems often come to light just after a delivery – which can be attributed to the fresh fuel, but in almost every case, this is due to the mixing of the contamination caused during the high pressure delivery of a commercial fuel truck.

Where can I get new inserts from?
Please contact the company who first supplied your Tank Sponge device

Delivery information


For our smaller items, a third party parcel service is used. Goods are wrapped and dispatched the same day and sent on a next day service. Orders must be received before 1pm for same day dispatch.

  • Same day dispatch
  • Next day service
  • Order before 1pm
  • £8.95 ex VAT per parcel (Free for orders over £150 ex VAT)
Pre 10.30am Next Day Parcel

For our smaller items, a third party parcel service is used. Goods are wrapped and dispatched the same day and sent on a pre-10.30am next day service. Orders must be received before 12pm for same day dispatch.

  • Same day despatch
  • Next day pre 10.30am delivery
  • Order by 12pm


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