Add a Riser to Your Tank and Never Dig Again

How many times are you willing to excavate your septic tank before you’ve had enough? Most homeowners face that decision without realizing a permanent solution exists—one that costs less than a single professional pump-out and takes a weekend to install.

The reality is straightforward: your tank’s access point sits anywhere from a foot to two feet beneath the surface. When you need service—whether that’s pumping every few years, filter cleaning, or emergency inspection—someone has to dig down to reach it. A riser changes that equation entirely. It elevates your lid flush to ground level, eliminating excavation permanently. For a rural property owner, it ranks among the smartest upgrades you can make, and it’s completely manageable as a DIY project for most homeowners willing to work carefully.

What follows is everything you need to execute this correctly: the materials checklist, precise installation sequence, common pitfalls I’ve observed, and the exact riser system I’ve relied on across hundreds of installations. I’ll also tell you plainly whether this particular job makes sense for you to tackle yourself or whether professional help is the right call.

Why a Septic Tank Riser Pays for Itself Within the First Service Visit

The numbers tell a compelling story. Over a typical septic system’s operational life—25 to 40 years—you’re looking at somewhere between 8 and 13 pump-outs. If excavation tacks an additional $150 to $250 onto each one (and in most rural markets it absolutely does), you’re hemorrhaging $2,000 to $3,250 purely for hole-digging labor. Your riser investment sits in the $75 to $150 range. The financial case closes quickly.

There’s also the destruction factor. Every digging event damages your yard—turf gets ripped, soil gets compacted, and heavy equipment near the tank risks cracking a concrete lid or jarring the inlet and outlet structures. I’ve witnessed backhoes punch through tank tops that weren’t properly marked. A riser eliminates all of that risk and the repair costs that follow.

Another advantage people overlook: access transforms service quality. When your pumper or technician can flip open a lid in 30 seconds, they actually examine the tank conditions. When they’ve just spent three-quarters of an hour with a shovel, they’re spent and behind—and the quality of that inspection suffers. Better access means better care for your system across every single service visit it receives.

Gathering the Essentials: Your Materials and Critical Measurements

You need to establish two key measurements before placing any orders: what diameter your tank’s access opening measures and how many inches separate the tank top from your finished ground level. Residential septic tanks typically feature access openings of 20, 24, or 30 inches across. Measure your actual opening—assumption is your enemy here. The vertical distance from the concrete surface to grade tells you what riser height you’re working toward.

I learned this lesson expensively. On an early installation, I estimated the depth at roughly 12 inches without measuring. Upon excavation, reality said 17 inches. Ordering another riser section cost me both time and money—a half day and roughly $40 in fuel. Verify your numbers carefully the first time, and you skip that aggravation entirely.

Essential Equipment Inventory

• Pointed shovel and flat spade for soil removal
• Metal tape measure, minimum 25-foot length
• Power saw equipped with masonry or polyethylene-rated cutting blade
• Butyl-based sealant matching manufacturer specifications or equivalent adhesive
• Fastening hardware—usually stainless steel screws, often bundled with kit
• Protective eyewear and work-grade gloves
• Padded kneeling protection for extended floor work

On the materials side, polyethylene is my material of choice every time. It resists cracking under freeze-thaw cycles, won’t corrode, and creates a dependable seal. Most current codes—particularly those mirroring NSF/ANSI 61 standards that jurisdictions typically reference—mandate watertight riser assemblies with tamper-resistant, properly fastened covers. You need a riser design that prevents both surface water entry and creates an appropriately sealed environment. Sloppy or undersized lids become both code violations and genuine safety hazards around confined spaces.

Septic Tank Riser Installation DIY: The Complete Sequence

Your first task is pinpointing your tank’s exact location. If you possess a prior inspection report, that document usually records the location. Without documentation, deploy a soil probe or thin steel rod, pushing it down until you feel the concrete barrier. Once found, excavate downward with a shovel—machinery stays off-site. Aged tank concrete becomes brittle, and cracked edges shatter easily under equipment. Your excavation needs care and patience.

When the lid becomes visible, scrub the surrounding concrete clean. Dislodge dirt, root fragments, and loose material. Your riser’s base requires contact with clean, level concrete to seal effectively. Should you discover significant cracking, spalling, or structural compromise on the existing concrete collar or lid, this is your stopping point. Call in professional support. Layering a riser over damaged concrete creates false confidence and opens the door to groundwater seepage or catastrophic failure.

Opening the Existing Concrete (When Necessary)

Certain tanks arrive from the factory with completely solid concrete covers and zero pre-existing openings. You’ll cut the hole yourself in those instances. Use the riser’s perimeter as your template to outline the circle. Employ a concrete-blade circular saw, executing your cut methodically. Concrete shards and powder become projectiles—eye protection is non-negotiable. Introducing water during cutting dramatically reduces airborne particles and makes the work far safer and cleaner.

Some installations encounter a cast iron ring or concrete insert already seated in the lid. When that existing element is smaller than your riser footprint yet still structurally intact, you may be able to work around it or use a transition ring designed for the purpose. Review what your specific riser system’s manufacturer says on this—most reputable companies address common tank variations in their guidance materials.

Installing and Securing the Riser Base

Spread butyl rubber sealant across the concrete opening’s border. Nestle the riser base firmly into position. With polyethylene bodies going onto concrete tanks, I apply sealant to both contact surfaces—the exposed concrete and the riser’s underside flange. This dual-seal approach gives me confidence. Then I drive the provided fasteners (usually stainless screws or bolts) through the riser flange and into the concrete collar, anchoring it securely.

Multi-section risers require stacking and sealing at each junction identically. Gaskets typically accompany such kits for inter-section bonds. I add a thin sealant bead anyway—belt and suspenders. Once your assembly reaches its final height, backfill methodically around the perimeter, compacting soil in 3- to 4-inch increments to prevent settling and riser tilt. Your completed lid should sit at ground level or slightly above—never lower, where ponding invites water infiltration.

The Riser System That Transformed My Approach to Tank Access

Installing a riser means your tank location is permanently marked and readily accessible. Without one, you depend on hand-marked stakes (which disappear), repeated blind digging, or faulty memory about where you excavated previously.

Where this approach excels

• A 13-inch height delivers adequate surface clearance—I rarely dig more than a couple inches when the pump truck pulls up.
• The 23.5-inch diameter aligns with the majority of typical residential tanks without forcing custom openings or supplemental adapter hardware.
• The installation window is genuinely two hours start to finish using standard homeowner tools—no concrete specialists, no unusual techniques, just methodical excavation and assembly.

Where realistic expectations apply

• You’re still required to excavate down to the tank initially—this system prevents repeat digging over the following two decades, but your first dig still happens.
• Tanks manufactured in older generations or built oversized may present diameter mismatches that demand adapter rings or custom cutting—always confirm measurements prior to purchase.

I had a moment of doubt halfway through my first riser install when the fit felt tighter than expected around the existing lid, but a little patience and careful wiggling got it seated properly without forcing anything. If you’re ready to stop digging, grab the Aero-Stream AS-R13 Septic Tank Riser Kit — 23.5″ Diameter x 13″ Tall.