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Lubricate and Install New Cartridge — Install New Cartridge

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How to Stop a Dripping Single-Handle Kitchen Faucet by Replacing the Cartridge · Step 9 of 11

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In this video

Apply a liberal amount of plumber's grease to the O-rings and the black rubber seals on the new cartridge. This lubrication is crucial for an easy installation and for protecting the seals from damage. Carefully insert the new cartridge into the valve body, ensuring the 'H C' marking is at the top to align the hot and cold water inlets correctly. Push the cartridge in until it is fully seated. Finally, re-insert the retaining clip to lock the new cartridge in place.

Goal: Install the new, lubricated cartridge into the valve body.

  • Lubricating the new cartridge with plumber's grease will make installation easier and extend the life of the seals.
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FAQs

What tools will I definitely need for this specific faucet cartridge replacement?

You'll primarily need a screwdriver (like the Milwaukee Flat Head), an adjustable wrench (such as the Crescent AC212VS), and pliers (like the Husky Groove Joint or Channellock Long Nose) to disassemble and reassemble the faucet components. A hex key set (GEARWRENCH 83510) might also be necessary if your handle uses set screws.

How can I ensure I purchase the correct replacement cartridge for my single-handle kitchen faucet?

The most crucial step is identifying your faucet's brand and model number, usually found under the sink or on the faucet itself. If that's not possible, carefully remove the old cartridge and take it to a hardware store to match it, like the MOEN 1225 specified in the materials, to ensure compatibility.

What are the most common mistakes beginners make during this project, and how can I avoid them?

A common mistake is not fully shutting off the water supply, so always confirm both hot and cold valves are off. Another is losing small parts like screws or the retaining clip (OMUR Connecting Clips) down the drain, which can be prevented by plugging the sink drain with a rag or towel (WYPALL L40 Towels).

How long should this project take for a beginner, and is it truly a 'beginner' difficulty task?

Yes, this is a beginner-friendly project, designed to be straightforward for most DIYers. For someone new to plumbing, it should typically take about 30-60 minutes, assuming you have the correct replacement cartridge and all necessary tools readily available.

Lubricate and Install New Cartridge — How to Stop a Dripping Single-Handle Kitchen Faucet by Replacing the Cartridge (Step 9, Video 1) | Stesso