Refresh your RV galley with a kitchen sink that fits and functions. Match your cutout to the overall flange—aim for a hole about 3/4" smaller than the flange for a solid drop-in fit. For top-mount installs without clips, silicone sealant and weight while it cures can hold it; undermount setups use studs with L-brackets and wing nuts tightened in a clockwise rotation, and swapping a double bowl for a single can free space for larger pots.
Yes, some undermount kitchen sinks can work as a top-mount. If the sink has studs, slip L-brackets over the studs, lightly tighten wingnuts, then go around in a clockwise rotation to snug them. If there are no mounting tabs, use silicone sealant and weight the sink while it cures. Check if faucet holes are provided; you may need to cut a hole in the countertop for a single-mount faucet.
Drop-in kitchen sinks are easier to seal, especially when replacing a poorly sealed undermount. Plan for possible trimming of the opening and drain adjustments. If your sink uses threaded studs and wingnuts, check that the threads are clean and don't overtighten, as the threaded pems are not to strong. Verify sink depth so plumbing lines up.
Measure the cutout and compare it to the sink's overall size including the flange. Generally, you want the hole to be at least 3/4" smaller than the sink flange itself. If the hole is larger than the flange, expect a gap you'll need to fill or cover. Be ready to trim the opening or adjust drain plumbing if the new sink is deeper or shaped differently.
A single-basin kitchen sink gives more room for larger dishes and pots than a shallow double. If replacing a double, confirm the cutout and flange will cover the opening. Check depth, since a deeper bowl can mean extra plumbing work. If upgrading from plastic, expect a cleaner look and easier cleanup when sized to fit your space.
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