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![IQSUB Manual addition valve Diluent IQSUB Manual addition valve Diluent](https://proteushop.com/28821-large_default/iqsub-manual-addition-valve-diluent.jpg)
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MAV (Manual Addition Valve) Diluent in solid Delrin.
Valve and valve knob made of chrome plated brass.
Body is marked as "Diluent" or "Oxygen".
Haptically coded knob to be sure which knob you touch in case of zero visibility.