Hello there, fellow DIY enthusiasts! Now, who’s ready to embrace their inner repairman/woman, and upgrade that kitchen with a shiny new gas cooktop? You are? Great, because I’ve got the lowdown just for you. Fasten your tool belt and let’s dive into this gas cooktop installation guide!

Keeping Safety in Check First

Before we get all excited and start ripping out old cooktops, let’s make sure we don’t blow up the house… okay? Here’s what we do:

• First things first, grab a gas leak detector. It’s handy and inexpensive. Safety isn't where we scrimp, pals. This will ensure you don't have any existing leaks before starting the project.
• Find your kitchen’s gas shutoff valve and make sure you turn it off before starting. Trust me on this; you don’t want a sudden flame shooting up in your face.
• Remove all flammable items from the area where you will be unpacking and installing your new kitchen jewel.

Removing the Existing Cooktop

We've got to make room for the new beauty, don’t we? Here's how:

• Disconnect the power and gas line from the old cooktop. Usually involves unscrewing a few fittings. Keep your gas leak detector close just in case.
• Once everything's disconnected, lift your old cooktop off the counter. It's best to have a buddy help with this section, especially if it's been a while since you last hit the gym.

Welcome Your New Cooktop

Your shiny new gas cooktop is all ready to make an entrance. Celebratory drumroll, anyone?

• Measure the hole in your counter. I cannot stress this enough - measure twice, cut once. You don't want a cooktop that's wandering around on your counter.
• Place your cooktop on the counter, ensuring it fits snugly within its new home. Wish it a warm welcome, folks!

Getting Down to the Real Business

This is where your handyman/woman spirit truly comes to play.

Connect the Gas

Reusing the old gas line? Attach it to your new cooktop. Consider using a new flexible gas line if the old one’s seen more springs than a jack-in-the-box. Get that gas leak detector involved again to ensure a tight, leak-free connection.

Seal it

Got gaps around the cooktop and countertop? Time for the sealant. Apply a thin layer to fill any cracks that might let spills seep in.

Turn On

Once everything's in place, turn on the gas and test out your new cooktop. Don't worry if the burners don't light immediately. They may take a moment to fill with gas.

Pat Yourself on the Back

There you have it - you've successfully installed a new gas cooktop by yourself! Now, you've truly channeled your inner handyman/woman. Feel free to take a moment to bask in the fruits of your labour, your new cooktop. Next time someone skeptically questions your DIY skills, just point towards your kitchen proudly. You earned it.

And a final reminder: If at any point during the procedure something doesn’t seem right, do not hesitate to call a professional. A successful DIY job is a safe DIY job. Until next time, keep those tools and spirits high!