Septic Tank Riser Installation and Lid Replacement

A riser and lid job typically includes the following:

• Locating and exposing the existing tank opening
• Sizing and setting a plastic or concrete riser section
• Sealing the riser with butyl sealant for a watertight fit
• Installing or replacing the lid or riser cover
• Backfilling and regrading around the finished install

The $650 riser installation and $250 lid replacement prices above cover most standard jobs. What can move the number is tank depth, how damaged the existing lid or opening is going in, and whether we're setting a plastic riser or one sized for an older concrete tank. We confirm the final number before we start any work.

On a lot of older properties, the septic tank sits two or three feet below grade, and every pump-out or inspection means digging down to the tank opening first. A riser extends that opening up to ground level, so a pumper or technician has easy access without hand-digging or running a machine over the yard. Once a riser is installed, locating the access point of the septic tank for future service takes minutes instead of an hour with a probe.

An old concrete lid cracks, settles, or gets damaged by a mower or a vehicle driving over it, and once that happens, it needs to be replaced before it becomes a hazard around an open septic tank. We check the lid condition every time we're on site for a pump-out, and if it's compromised, we swap it during the same visit instead of scheduling a second trip. We never leave an open septic tank unattended, even for a few minutes, while we swap a damaged lid for a new one.

Installing a septic tank riser starts with locating the tank and exposing the top of the tank around the existing opening. We measure the distance from the tank to ground level to determine the height of the riser section needed, then set a plastic riser, or a riser sized for a concrete tank, sealing the connection with butyl sealant to keep the fit watertight. A riser lid goes on top of the septic tank, secured so it stays in place but still gives easy access for the next pump-out or inspection.

We install both Polylok and Tuf-Tite riser kits, along with a poured concrete lid when a property calls for one instead of a plastic riser system. Most residential tanks take a 20-inch or 24-inch riser, sized to the depth of the tank and the diameter of the tank opening. Commercial tanks often run larger, so we size the riser to the tank on site rather than to a standard residential dimension. For a septic tank riser kit to seal properly, the base has to seat flush against the tank before we backfill around it.

Every septic riser we install starts with a quick site check. We confirm the center of the tank, measure the height needed between the tank and finished grade, and match that to a riser section and riser cover sized for the setup. Getting that measurement right the first time is what separates a proper installation from one that leaks or settles within a year. We bring our own tools and materials to every job, so there's no waiting on a supply run mid-visit. The installation process usually takes a few hours from initial digging to backfill, and once the riser replaces the old buried opening, every pumping or inspection visit after that goes faster.

We properly install and seal every riser before we backfill, so there's nothing to dig up and redo later. Once the riser and lid are set and sealed, we backfill around the tank and bring the grade back to level so the riser sits at or just above the surrounding ground instead of trapping water against the seal.

Alex Rusev holds South Carolina's Tier 3 septic installer license, the state's highest tier, and every riser and lid job is handled by our own crews using the same trucks and equipment we bring to a pump-out.

Check our septic tank pumping and septic repair service pages for related work.

If you need to install a septic tank riser, or your current one is cracked or buried under a foot of dirt, call (864) 431-2822 for a free estimate. We serve Spartanburg, Greenville, Cherokee, Pickens, and Anderson counties, and we can often install a riser or swap a lid the same day we're out to pump the tank.