This is not advised as the HepvO valve will not be able to suck any air through as the normal water trap seal will be in the way. The HepvO can be installed in this scenario if its only purpose is to stop bad smells from the drainage system.
This is not advised as the HepvO valve will not be able to suck any air through as the normal water trap seal will be in the way. The HepvO can be installed in this scenario if its only purpose is to stop bad smells from the drainage system.
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