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Quadrabathe Check Valve The Quadrabathe check valve is used if you place your shampoo higher than your tub. If the shampoo is overhead it will gravity drain into the mixing unit and you won't be able to rinse. The check valve is not needed if your shampoo is kept below the tub.
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🇺🇸 Ship from USA · On Agora since 2026
$25.00