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Sink Repair FAQs, answered by experts

While you can put Drano in a sink with standing water, most plumbers don’t recommend doing so. It usually doesn’t help to clear the clog, and you’ll end up with a sink full of standing water plus a toxic chemical—which is very unpleasant to deal with and best handled by a professional.

Yes, a toilet, sink, and shower can share the same vent. This is a common plumbing practice that can simplify installation and save space. When sharing a vent, it's important that the toilet is located downstream from all other fixtures. You will also need to ensure the vent pipe is large enough to handle the demands of all connected fixtures without compromising its effectiveness. Because requirements can vary, you should always check your local building and plumbing codes. Consulting a qualified plumber is recommended to ensure the vent is properly sized, installed, and adheres to all local regulations.

Clean regularly with non-abrasive cleaners, avoid pouring grease down the drain, and check for leaks under the sink.

The cost depends on the parts, labor, extent of damage, and whether extensive plumbing modifications are required. Typical repairs cost $150-$300.

Yes, you can fit a vanity unit to an existing sink, especially if you plan to custom-build the vanity. With a prefabricated vanity, you’ll likely need to make a few adjustments. It depends on the type of sink, the size of the sink, and the existing plumbing. If you plan to retrofit a sink into a prefabricated vanity, make sure you take precise measurements and that your sink is compatible with the vanity you select. Prefabricated units have a precut sink hole, so you’ll need the size to match your sink.

The Sunol, CA homeowners’ guide to sink repair services

From average costs to expert advice, get all the answers you need to get your job done.