The Biofuel Tank Upgrade or the BTU is a cost-effective solution for upgrading existing fiberglass single-wall tanks to meet new regulations. Many of the earliest generation fiberglass tanks were not tested nor were they warranted for either biodiesel or ethanol blends exceeding 10%.

The BTU can be applied in combination with typical tank upgrades like sumps and collars or as a stand alone service.

Unlike conventional tank lining methods, the BTU upgrade is completed by CSI technicians who are experts in fiberglass tank manufacturing techniques.

In all cases the candidates for the BTU are older tanks. CSI SW and DW storage tanks are compatible with ethanol blends up to E100 and biodiesel blends up to B100.

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