Boat design and hull shapes

Drain holes

Also: drain openings, drain holes

Drain holes are openings in the floor of a self-bailer through which water drains out.

Some boats have many small holes, others a few large ones, partly with flaps. Anfibio solves it on the Revo with a single closable drain tube, the VenturiTube.

Sources and further reading

• Packrafting Store: open and decked boats compared

Research as of 13 Nov 2026. We have marked manufacturer information as such.