From the start, ensure your new faucet is compatible with your RV bathroom’s setup.
Switching from a two-handle faucet to a faucet with one handle means extra holes.
You can then begin gathering the necessary tools. This job should only require a handful of tools like an adjustable wrench, channel locks, and a headlamp.
If you’ve been using the city water connection, shut off the water spigot.
If you’re using the water pump, turn it off.
Have a towel and bucket handy when loosening the water lines and gaskets.
There’s a chance that some water will remain in the water lines.