This Duotight non-return valve is designed to allow gases or clear liquids to pass in only one direction. Pressure of 1 PSI is already sufficient to open the internal valve.

Duotight fittings guarantee a 100% leak-free result thanks to their superior sealing qualities. Their secret is not one but two O-rings, made of top-quality EPDM. To ensure a complete seal, cut the hose as straight as possible. Duotight fittings are pressure-resistant up to 6.5 bar. This fitting is compatible with the EVABarrier hose (see accessories 058.864.2 or 058.864.10).
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