There are a few techniques you can use to find a hidden septic tank lid:

The septic tank should be situated close to the point where wastewater exits the home, typically close to the foundation or basement. To find out where the tank is, you can also look at the property’s septic system design, if one is available.

Look for hints: Look for hints that could point to where the septic tank lid is, like a manhole cover, a pipe that runs from the home to the ground, or a depression in the ground.

Use a metal detector: If you have one available, you might be able to use it to find the septic tank’s metal cover.

Consult a specialist: If you’re having trouble finding the septic tank lid on your own, you might want to speak with a septic tank specialist. To find the lid and enter the tank for upkeep or repair, they can utilise specialised tools and methods.

When looking for a buried septic tank lid, you should exercise caution since you can come across other underground utilities or things. It is important to seek professional advice if you are unsure of where the lid is or if you are worried about safety.