There are several advantages of having a septic cover extension. Let’s take you step by step, type by type, and find the best septic cover extension for you.

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Our Top Picks:

Best Overall: Buy: Tuf-Tite Septic Tank Riser READ REVIEW

Best With Tur Tite Riser: Buy: Tuf-Tite Septic Cover Extension READ REVIEW

Best For Square Opening: Buy: Polylok Square Riser Adapter Ring READ REVIEW

Best For Sump Pump: Buy: Polylok Septic Cover Extension READ REVIEW

Best For High Quality: Buy: Aero-Stream Septic Cover Extension READ REVIEW

Best With Alarm: Buy: Liberty Pumps Septic Cover Extension READ REVIEW

Best Overall: Tuf-Tite Septic Tank Riser

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We are personally inclined towards Tuf-Tite Septic Tank Riser, It is not so pricy, but it overachieves its purpose and is outstanding in important aspects. The tuf-tite septic tank riser is ideal for septic tanks. Make sure this fits by entering your model number. The 24x12 tuf - tite septic tank riser is made from hdpe and is UV resistant.

Most importantly, the tuf-tite septic tank riser is easy to assemble, is effective and it is a perfect fit.

Almost all buyers agree that the extension is made of good quality material. Further, they strongly agree that the extension is easy to install, and saves a lot of digging when pumping is required. In addition, a few also found that the cover included " stainless steel 18-8 (a2) - 1.5 inch length. To sum up, buyers found this to be one of the best extensions for daily purposes.

• This allows easy access plus it is made of hard plastic.
• This includes stainless steel safety screws, assuring a secure structure.
• This works great and it is suitable for heavy duty.
• Available at 12”, 16”, 20” and 24” diameters.

Best With Tur Tite Riser: Tuf-Tite Septic Cover Extension

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The Tuf-Tite Septic Cover Extension is suitable and reliable and fits well with your daily purpose. The tuf-tite septic cover extension is great for brand name and it is great for a great price. Make sure this fits by entering your model number. Also, it is designed for exact replacement, is best for prompt delivery and it is a perfect fit.

Above all, the tuf-tite septic cover extension looks good, is best for a good deal and it looks great.

Most customers quickly discovered that the extension was designed to fit tuf-tite risers. Moreover, a few strongly agree that the cover is 24". There is a good chance this will work. In addition, they strongly agree that the cover actually measures almost 28 inches across when measured from the top side.

• Molded-in lid gasket. No fighting with o-rings. Assures a watertight seal every time.
• This works perfectly with the title riser.
• This comes with stainless steel screws.
• It is very strong, fits well and it works well.

Best For Square Opening: Polylok Square Riser Adapter Ring

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate cover. The Polylok Square Riser Adapter Ring is exactly that - it's a simple cover that hits all the right notes. The polylok square riser adapter ring is the only adapter ring on the market that accepts 20" or 24" polylok risers. You can now use any 24" polylok riser. The polylok square riser adapter ring is designed to connect the polylok septic tank risers or lids to an existing concrete tank with large square or round openings.

The extension is made of virgin high density polyethylene. Lastly, the polylok square riser adapter ring is ideal for retrofitting existing septic tanks and can be secured with ease.

Most buyers quickly discovered that the cover is perfect for retrofitting onto existing tanks. In addition, they also found that the extension has 6" risers but if would not add up to your needs. In addition, they strongly agree that the extension covers the complete opening to add that it is convertible from 20" to 24. With no doubts, this product passed the test and had very satisfied buyers eager to share their experience.

• These fit well and it is ideal for heavy duty.
• Covers up to 25" square opening.
• This is easy to install and has a nice connection to the risers.
• Adapter ring accepts either 20" or 24" risers.

Best For Sump Pump: Polylok Septic Cover Extension

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The best part: Polylok Septic Cover Extension costs comparatively low and it is available to ship in 24 hours. The polylok septic coverextension comes with a factory installed gasket to assist with creating a watertight connection. The manufacturer says: Our covers are designed to fit our risers, distribution boxes, plastic tanks and corrugated pipe. Also, it is black and it fits well.

The extension works fine, looks good and it comes with great customer service. In addition, it offers an extensive line of covers. Most importantly, the polylok septiccover extension includes a foam gasket for airtight and watertight applications.

Most buyers quickly discovered that the cover fit on the lip of the corrugated pipe really well. Also, they also found that the cover is solid and seals well, does the job well. Moreover, they say that the cover is not truly " flat " but has a honeycomb of plastic underneath as a stiffener that really makes the cover quite solid and durable, albeit about 3 " thick, which is not a problem with the riser. Therefore, most customers call the cover suits best, and no one questions it.

• This is designed to work with polylok risers and 24" id plastic culvert pipe.
• This includes square drive screws to discourage unauthorized entry.
• Highest level of UV protection included.
• This fits the septic riser nicely. Additionally, it is missing the screws, no big thing.

Best For High Quality: Aero-Stream Septic Cover Extension

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate cover. The Aero-Stream Septic Cover Extension is exactly that - it's a simple cover that hits all the right notes. The aero-stream septic cover extension is rectangular and it is a great item. The manufacturer says: All of our kits include the secondary safety barrier at no additional cost. The patent - pending septic riser adapter flange with integral safety barrier provides added protection from an incidental security breach of the primary septic riser cover.

The extension fits all opening shapes, e.g. Above all, the aero-stream septiccover extension is black, is designed for easy installing and it has mounting fasteners.

Most buyers opine that the cover is easy to install but the instructions were difficult to follow. Moreover, they strongly agree that the cover is easy to find as opposed to trying to find the much deeper hatch in the septic tank lid. And, they strongly agree that the cover is designed for a 24" circular or squared opening. Obviously, this cover passed the test and had very satisfied buyers eager to share their experience.

• This is perfect for a good deal, is very durable and it comes with a complete kit.
• This is made of recycled hdpe.
• Includes: safety barrier, riser, cover, mounting fasteners, sealant, and illustrated instructions.
• This comes with screws to keep the lid secured shut.

Best With Alarm: Liberty Pumps Septic Cover Extension

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Next on the list, we've got yet another cover that manages to win our hearts. It's the Liberty Pumps Septic Cover Extension and it's widely considered as one of the most convenient covers you can buy. The liberty pumps septic coverextension is retained by 4 stainless steel bolts and features a twist-lock design with provision for a padlock to deter unwanted entry. Make sure this fits by entering your model number. The access riser simply slides over the sealed pro370 or pro380 system. Lastly, the liberty pumps septic cover extension allows for a great fit and has a good design.

Almost all buyers quickly discovered that the cover is molded to mate correctly on top of the pump. Also, a few also found that the cover is great to form a concrete extension and is considerably cheaper. Also, they also found that the riser sits on the top, outer edge of the pump basin and seals it with a butyl rope seal. In short, at the price, they believe that they got a steal of a deal with it.

• This can sit on top of a liberty pro380.
• It features a twist-lock design with provision for a padlock to deter unwanted entry.
• It has been a year and everything is great.
• This comes with a junction box... but it mentions it as though it does.