Changing a faucet, toilet, disposal, shower head, supply line, or appliance connection may seem simple, but small plumbing issues can become bigger problems if something does not seal correctly.

Before starting a DIY plumbing project, it is important to know what you are working with and how to stop the water if something goes wrong.

Before You Start

Before replacing a fixture, check:

• Where the shutoff valve is
• Whether the shutoff valve works
• Whether the existing supply lines are in good condition
• Whether the new fixture is compatible
• Whether the old parts are corroded or stuck
• Whether you have the right connections
• Whether there is already moisture, staining, or damage nearby

If the shutoff valve does not work, the project can become more complicated quickly.

Common DIY Fixture Issues

Problems can happen when:

• A connection is overtightened
• Threads are damaged
• A washer or gasket is missing
• A supply line is kinked
• A shutoff valve starts leaking
• A fitting is the wrong size
• A toilet seal is not seated correctly
• A disposal or dishwasher drain connection is not installed properly
• A faucet connection leaks under the sink

A small drip under a cabinet can cause damage if it is missed.