11 Steps to Extend a Faucet Supply Line 2021

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Extending a faucet supply line is required in some cases while you’re installing a new kitchen faucet and it doesn’t reach your old supply lines or the old supply lines are broken. It may seem difficult but it’s pretty easy and we’ve given so many solutions in different ways to the users.

So, how to extend a faucet supply line? You just have to connect the extenders for both water supply lines (hot & cold). Sometimes, you need to label them and use Teflon tape to make the joint strong. You don’t need a plumber or professional to perform this.

Many people find it hard because they don’t have proper information on handling the tools and the lines under the sink. It’s easy. Let’s check how you can extend your faucet supply lines.

11 Steps to Extend a Faucet Supply Line:

  1. First of all, turn off the water supply lines. Don’t just turn off the faucet, make sure you turned off the supply lines that bring water to your faucet. If you don’t have valves installed, shut off the main water supply line of your home for avoiding any unwanted messy accidents. After turning off, drain the water remaining in the pipes and hoses first.
  2. Now, if there are any extenders installed and they’re broken, remove them. Sometimes, you need a wrench to detach the extenders if there’s rust inside the nut.
  3. After that, label both cold and hot water supply lines extenders. It’s essential to label them if your extenders don’t come up with markings. By doing this, you can be sure that you’re attaching the right hose to the right place. Your faucet handles will work as expected by doing this.
  4. You have to use thread sealant or Teflon tape on the threaded pieces now. It’ll make sure that you’re tightening hard your extenders and there’s no leak existing.
  5. Now, attach the connectors to the faucet body. Hand-tighten the nuts there and make sure you’re not over-tightening.
  6. Attach the faucet to the sink. You can find the mounting holes there. Some new faucets require 3 hole installation and a base plate additionally. Place the faucet carefully and tighten the mounting screws or nuts.
  7. When you were installing the faucet to the sink, it’s essential that you do several things. You need to insert the connectors through the holes you can find in your countertop. In most cases, holes are drilled there already.
  8. Besides, you need to use the rubber gasket retainer ring carefully and make sure that the faucet is in its place firmly.
  9. Now add a couple of layers with the thread sealant or Teflon tape at the other end. It’s necessary to prevent any kind of unwanted leaks.
  10. It’s time to connect the extenders with your supply lines. This is where you need the labeling. Your labels will ensure that you’re connecting the extenders to the right supply lines. Tighten them with an adjustable wrench or with your hand. Don’t over-tighten the nuts.
  11. After everything is done carefully, turn back on your water supply line valves or the main supply valve. Check if there’s any leak remaining or water dripping from any part. If you notice water dripping from the nut area, you can tighten them to prevent leaks or drips.


So, this is how you can extend your faucet supply lines. You just need to follow these steps. Be careful while you’re extending. Make sure you turned off the supply lines first. Besides, over-tightening can harm your connectors. Make sure you tightened them softly and with hands first.

If anything goes wrong somehow, it’s good to get help from professionals.

Sophie Turner
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