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Visi-Flo indicator verifies fluid flow.(New Products For Primary And Customer Fuel Oil Storage)

The Visi-Flo sight-flow indicator provides a reliable and economical way to verify flow and monitor color and clarity in fluid lines and OPW Engineered Systems backs this claim with an exclusive three-year "no-leak" guarantee. Visi-Flo's radial seal creates a constant and uninterrupted sealing force between the body and outside diameter of the glass lens. This sealing method provides a longer lasting and better seal than conventional fiat seals, mea

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