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Reassemble Faucet and Test — Reassemble and Test the Faucet

Beginner3 hours

Part of project

Faucet Repair: A Step-by-Step DIY Guide · Step 4 of 4

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In this video

Begin reassembly by screwing the retaining nut back on over the new cartridge. Hand-tighten it, then give it a final snug turn with pliers if needed. Next, screw the chrome dome cap back on. Place the handle back onto the cartridge stem, making sure it is oriented correctly. Insert the set screw back into the side of the handle and tighten it with the hex key. Once everything is reassembled, slowly turn the main water supply back on and check the faucet for any leaks.

Goal: Complete the repair and verify the leak is fixed

  • Do not overtighten the retaining nut or the set screw, as this can damage the plastic threads or the cartridge.
  • Turn the water on slowly at first to check for leaks before turning it on fully.

Used in this video

  • Pliers (Tool Type: Hand Tools, Power Source: Manual, Material: Metal) · optional — To give the retaining nut a final snug turn.
  • Hex Key (Allen Wrench) (Tool Type: Hand Tools, Power Source: Manual, Material: Metal) — To tighten the set screw and secure the faucet handle.
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FAQs

Is a basin wrench always necessary, or can I complete this repair with only an adjustable wrench and screwdriver?

While an adjustable wrench might work for some accessible nuts, a basin wrench is highly recommended for faucet supply lines. Its long handle and swivel head are designed to reach tight spaces under the sink, making disconnection much easier and preventing scraped knuckles. It's worth the small investment if you plan on doing more plumbing DIYs.

I'm worried about flooding my kitchen. What's the most important safety precaution for this project?

The most critical step is to completely turn off both the hot and cold water supply valves under the sink *before* starting any disassembly. After turning them off, open the faucet briefly to drain any remaining water from the lines. This prevents unexpected leaks and potential water damage when you disconnect the supply lines.

How much does a typical leaky faucet repair cost, and is a 'beginner' difficulty truly accurate for someone new to plumbing?

The cost is usually minimal, often just a few dollars for replacement O-rings, washers, or a cartridge (typically $10-$30). While classified as 'beginner,' the difficulty can vary depending on faucet accessibility and component type. Expect potential frustrations with tight spaces, but with patience and the right tools, it's very manageable.

I've replaced the internal components, but the faucet is still leaking. What should I troubleshoot next?

First, ensure all connections are tight but not overtightened. Recheck that the correct replacement parts were used for your specific faucet model, as slight variations can cause leaks. Sometimes, the faucet body itself might be corroded, or the valve seat needs attention, potentially requiring a full faucet replacement if repairs aren't effective.

Transcript
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now we have installed a new cartridge and we are going to cover with this now so we have installed the steel portion of that cartridge cover as well here also we have this the last stage right now and we are going to put the handle bar and the handle bar also sits in only one direction either this way or this way so on just you can verify that if you were to put it like this then it would be moving in the opposite direction probably we don't want that so after installing that tap now we are opening up the water so we have installed the new cartridge and now I have placed the handle to the right and no more leak earlier there was water leaking through this area and so we were able to solve it by installing a new cartridge and it seems like Moyne is

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