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Alternatives to Water Tank Replacement

Posted on August 16, 2011

If your company’s water tank is damaged or contaminated before looking into water tank replacement which can prove to be an unnecessary and expensive option, consider a more cost-effective and environmentally friendly alternative.

Leaking GRP Tank

Often, Glass Reinforced Plastic (GRP) replacement tanks are thought of as the ideal solution. At  COVAC, we know that whilst Glass Reinforced Plastic (GRP) is widely used in water tanks, it has many more problems than benefits, in fact, a large percentage of our business is relining GRP tanks that are often only a couple of years old.. GRP has been proven to promote bacterial growth, which in turn leads to various problems in a very short space of time.

Leaking GRP Tank

Despite continual cleaning and chlorination of GRP tanks, bacteria can continue to multiply in air-filled cavities and cracks in the lining that are often undetected. Soon bacteria develop into an acidic chemical which then bursts, contaminating the water within the tank. This contamination not only leaves the water bitter tasting, but can also be toxic.  Consequently, GRP is not approved or recommended by the Drinking Water Inspectorate for drinking water storage tanks.

Leaking GRP Tank- Plant Room Floor

A further problem with GRP tanks is corrosion of the steel fastenings that hold tank panels together which, in turn, leads to contamination and possible leaking. But, the major cause of leaking with GRP water tanks is the deterioration of the mastic used between GRP tank panels and the results of this are often disastrous.

GRP Tank- Failed Mastic

At COVAC we are the only UK suppliers and approved applicators of 3M Scotchkote Urethane Coating 165PW; a material specifically formulated for water tank coating and relining. Relining your water tank with our specifically designed coating is a cost-effective solution to water tank problems that we highly recommend.

Failed Mastic on GRP Tank

The main reason for adopting the use of this specifically developed material when re-lining a damaged tank is because 3M Scotchkote Urethane Coating 165PW has been proven to resist bacterial growth, preventing any of these major problems from occurring. It has a ceramic, tile-like finish making it easy to clean and maintain, but also has extremely high elongation properties which means it will accommodate the structural movement of the tank and the mastic between the joints.

GRP Tank Fully Coated with 165PW

So before considering water tank replacement, don’t hesitate to contact the COVAC team as we are more than happy to offer you advice as well as a free, no obligation quote. Contact us on 08000 484609 for further information.

GRP Tank Fully Coated

Repaired and Relined using 165PW

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