This static bypass unit effectively dewaters and polishes the diesel tank. Removes free water and contaminants from the VERY BOTTOM of the tank Cleans your diesel with a fine washable stainless steel filter Fitted with a 12v pump Supplied with straight fittings for 10 mm ID pipe 12 months guarantee Optional drain alarm No more sludge in your filters, no more losing power, no more expensive tank cleaning! It sucks from the BOTTOM of the tank, not through the fuel line. Recommended to use when the vessel on passage to scour the tank bottom. For tanks with excessive sludge, we recommend a pre-strainer so that the system isn't overloaded when first run.