How To Find A Septic Tank With A Metal Detector? (Brief Guide)

How To Find A Septic Tank With A Metal Detector?

Affiliate Disclosure: When you buy a product via our links, we sometimes earn a referral fee. Learn more

You’ll need to locate your septic tank if sewage backs up into your home or your main drain line has become plugged.

It might be time-consuming if you wish to inquire about a septic tank. Professionals may have difficulty locating the site.

Is finding a septic tank, on the other hand, really critical? Before a house is purchased or remodeled, the septic tank must be examined and tested.

Septic Tank With Metal Detector

It’s among the most crucial home elements to be assessed and maintained regularly to keep the surrounding area pollution-free.

Using a metal detector will, of course, make your job easier.

What are septic tanks?

A septic tank is a block of concrete, fiberglass, or plastic subterranean chamber through which home wastewater runs for primary treatment.

Solids and organics are reduced by settling and anaerobic processes, although modest treatment effectiveness.

It must keep the wastewater in place long enough for particles to sink sludge forms at the basement, while sludge float to the top and produce scum.

A septic tank is a waterproof, subterranean tank that receives partially treated raw water. The solid waste is kept floating in the septic tank while the wastewater is sent to the drain field for treatment.

The majority of homes use a conventional gravity septic system. It comprises a cleanout, a septic tank, a D-box, and a gravity drainage field.

The tank’s capacity is decided by the number of bedrooms within your home. The regular 1600L concrete tanks are the most prevalent in homes.

The functionality of septic tank:

  • A septic tank serves a crucial purpose in maintaining public health and the environment’s safety.
  • Maintaining a properly working septic tank boosts a home’s value, requiring dedication.
  • All of a home’s wastewater is piped into a septic tank and kept underground.
  • A septic tank serves a crucial purpose in maintaining public health and the environment’s safety.
  • Maintaining a properly working septic tank boosts a home’s value, requiring dedication.
  • All of a home’s wastewater is piped into a septic tank and kept underground.
  • To construct storage or holding area for collected sewage to segregate solid and liquid wastes.
  • To decompose the organic material in the sewage via biological decomposition with the help of microorganisms.
  • To keep the ensure quality safe until they are pumped out or removed.

Before you start:

Consider following safety measures and aspects before detecting septic tanks with the metal detector.

  • Read the handbook to learn about the components and what each one does.
  • Use the nut and screw that came with the search coil to secure it to the bottom stem.
  • For flexibility, secure the stem to the upper stem’s nadir and snap the ball-like iron at the lower stem’s tip into one of the holes.
  • Connect the control panel and begin your configurations.
  • Adjust the settings upon that metal detector using the modes and P/P features.
  • Make sure you don’t have any subsidence or sinking soil. Of course, you can extend your wrists in the direction of both the gap, but you should avoid stepping on them.
  • Avoid dry wells and keep an eye out for a septic tank where nearly all lines are routed.
  • To avoid reptiles and injuries, make sure you put them upon your safety gear.
  • After that, you may start disassembling the metal detector. First, detach the control panel knob and the nut that connects its search coil towards the bottom stem.
  • Remove the lower branch from the top stem after that. This assignment will not take long for you to accomplish.
  • When looking for a safety tank, consider avoiding that sinking soil. When looking for land, you should wear gloves but avoid stepping on the soft surface.
  • Avoid dry wells and keep an eye out for septic tanks with practically all pipes channeled. To avoid injury, remember to put on your safety gear.
  • An aging septic tank and good dry lids might collapse, causing you to tumble or, even worse, swim.


Metal detectors may find objects buried just a few inches beneath the surface.

Apart from that, they are futuristic in that they search for all types of metals, and users may even distinguish between the results. Any metal detector located near your market would suffice.

In other words, you may use a metal detector to locate a particular type of metal. This would make your research more accessible and more convenient.

However, the search might be perplexing if one hasn’t fully learned because one must understand how metal detectors function and how septic tanks are often placed.

Choose the suitable metal detector:

First, choose a metal detector to locate the septic tank; a large-diameter indication is recommended.

Because the sensitivity of a vast region rises, you should select a metal detector that you can adjust for different types of metal.

Select the metal option while looking for a septic tank since most components are iron metal.

Setup the metal detector:

Use the instructions manual to find the septic tank once you’ve started looking for it.

Furthermore, it is recommended that you set your metal detector to all metals. Because employing this method is more practical than discerning metals when searching.

If somehow the discriminating option is selected, metal detectors may fail to distinguish a specific metal due to the soil’s composition and some technological challenges.

You may even hold it in one hand while holding a long stick or shovel in the other for simple digging.

Where to start detection?

Septic tanks are frequently discovered surrounding the property, which is one of the necessities that one must absorb when searching.

They’re usually placed 20″ apart from a building’s wall. Not only that, but specialists frequently observe other techniques when looking for a septic tank cover.

Metal detectors have the advantage of reproducing distinct noises for different materials. Then, secure the search coil to the bottom stem using the nut and screw that came with it.

Keep these pointers in mind for quick results when you begin your search. We recommend that you set your metal detector to all metals.

Because it is more practical than trying to distinguish between metals while searching, before utilizing the sensor, you should become familiar with the sound it makes when it detects a specific metal since this will aid you in rapidly locating a hidden safety tank.

Clear the path:

Use a cleanout snake to snake your way down the sewage line. You will be able to detect something using a metal detector at the end of either the snake when it reaches the septic tank.

Septic tanks are usually positioned near the home itself, although there are exceptions. It is sometimes just a single section of pipe from home.


If you’ve discovered the septic tank, you’ll need to disassemble the metal detector. First, detach the control panel knob and the nut that attaches the search coil to the bottom stem.

Then, from the top limb, remove the bottom stem. You will complete this procedure in a short amount of time. Metal detectors are waterproof. However, they must be dried soon after usage.

Cleaning the tank:

You must, of course, clean it after each usage. After all of the steps have been completed, you may save them.

Cleaning the control panel with water, on the other hand, should be done with caution because water might harm it.

Why detect?

  • The main reason specialists fail to find a septic tank cover is that they do not inquire whether the septic tank is linked to the municipal system. If the response is no, the expert can begin their quest.
  • However, another option for a quick search is to look for the drain outflow and then use a pumping snake to locate the terminal. This would also make it easier to find the location of the septic tank.
  • However, suppose all of these are rare, and the only alternative is to utilize a metal detector from beginning to end. In that case, the searcher can employ the following techniques to make the process easier.
  • The earlier you prepare for calamities like a septic overflow, the better.
  • You will not be charged extra to have your tank located by specialists. Septic tanks get overburdened and overflow.
  • Such threats are simple to eliminate if you know where your tank is. You’ll get it cleaned, repaired, pumped, and upgraded by an expert.

Point out the right location to detect:

If bushes and tiny grasses border the home, search for a barren part around it. A septic tank may be located on a piece of land where the kind or color of grass growing differs from that of the surrounding areas.

Septic tanks are generally between ten and twenty-five feet from the house. Insert a tiny metal probe into the earth every few feet until you reach polyethylene, polyester, or flat cement.

The minimal distance from the home varies depending on the locality. However, it is usually 10 feet. However, if you’re going to use a private well for drinking water, keep in mind that many state health agencies demand a minimum distance of 50 feet between a new septic tank and a well.

If the arena is filled with dry or muddy sand, there must be an area of the arena surrounding the house where the ground level is not equal.

They are generally found in downhill locations that are a short distance from a structure. Regardless, it can’t be more than 10 feet away from a network.

These suggestions are equally relevant to a snow-covered area. Even specialists have trouble finding septic tanks. The truth is that they aren’t unique or secret tactics; they’re just tried and true ways for locating your tank.

If you don’t have a basement, seek your roof vent outdoors. This pipe protrudes from your roof and is used to vent sewage gases to the exterior.

The sewage line from the home to the septic tank usually exits just below this vent. With any hope, you’ll be able to locate your septic tank directly from this location. A green rectangle across your yard might be the site of your tank.

You can search for your tank by probing or digging, and you will locate it with luck. Everything that appears to be a septic tank isn’t necessarily one.

One of the Old foundations, Buried debris, or Grave Vaults may have been discovered.

By prodding the earth every few feet with a metal probe, you can find your septic tank’s lid.

On average, lids may be buried up to a foot deep, so look for any lumps that could suggest anything is hidden beneath.

Which metal detector to use?

Now, if you’re looking for a metal detector, it’s best to go with one with a large number of diameters because it would increase the system’s sensitivity.

Also, select the one with the most convenient sizes for you, especially adjustable ones. Buying those that come with extras like shovels and other tools can make your job easier.

On the other hand, metal detectors have the advantage of reproducing distinct noises for different metals. However, use a unit whose noises you’re comfortable with.


This is the most basic method for locating a septic tank using a metal detector. This article gave the necessary guidelines for detecting tank cover on various surfaces.

The information is well-researched and trustworthy for practical usage of the unit. Anyone may put the recommendations into effect, and you can utilize them in any weather.

Most of these reinforcing bars are composed of steel, which is not very electrically conductive. However, you won’t require a sensitive detector to identify it because it is significant.

When looking for the septic tank, it is critical to avoid wearing any steel-toed footwear since your shoes will continue to give a misleading signal.

Leave a Comment