Quick Summary
The Joyzan yacht drain vent is a stainless steel thru-hull fitting with a 1/2-inch outlet port. Its stated uses include drain holes, sink drains, mobile-well overflow ports, and bilge-pump discharge or vent applications.
Compatibility, Size and Fit
The listed applications do not establish fit with every boat, vehicle, hose, or installation. Check the outlet connection and the dimensions of the intended hull opening against the exact fitting before choosing it.
What to Compare Before Buying
- Outlet size: The stated port size is 1/2 inch. Confirm that it matches the hose or connection for your setup.
- Installation fit: Compare the fitting with the required opening and available space. No other fitting dimensions are specified.
- Intended use: Match the fitting to the planned drain, overflow, or bilge-pump application rather than assuming universal compatibility.
Before You Decide
Confirm the 1/2-inch port, the hull-opening fit, and that the fitting suits the intended application. The product description presents installation and replacement as straightforward, but does not give a detailed installation procedure.





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