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Osma Solvent Weld Overflow is manufactured in ABS (fittings) and PVC-U (pipe). Available in white - 21.5mm size. Compatible with condensate fittings. Wavin Osma Solvent Weld Overflow is manufactured in ABS (fittings) and PVC-U (pipe). Available in white - 21.5mm size. Compatible with condensate fittings. Connects solvent pipe at 90° Solvent weld socket at each end Secure permanent jointing Compatible with Wavin Osma condensate fittings