Why Brick Sewer Inverts Are Getting Attention — and Why They Matter

If you’ve seen our recent brick sewer invert posts circulating on Facebook, you’re not alone. Red brick channels inside sanitary sewer manholes have been getting a lot of attention — and a lot of questions.

Why brick? Why not just pour concrete? Is it outdated — or is there a reason it’s still used today?

The answer is simple: brick sewer inverts aren’t decorative — they’re functional components of a properly constructed sewer structure.

What Is a Sewer Invert?

In simple terms, the invert is the channel at the bottom of a sanitary sewer manhole where wastewater flows.

It directs flow from one pipe to another inside the structure. If that channel is uneven, deteriorated, or improperly shaped, it can contribute to:

• • Turbulence
  • Debris accumulation
  • Premature wear
  • Flow inefficiencies
  • Accelerated structural deterioration

The invert isn’t just part of the structure — it directly impacts how well the system performs over time.

Why Brick Has Historically Been Used in Sewer Inverts

Brick sewer inverts are common in sanitary systems because they allow for controlled shaping and precision inside existing structures — something that can be difficult to achieve with poured materials during rehabilitation.

When properly constructed and maintained, brick inverts can provide long-term service performance within sanitary sewer environments.

Here’s why brick continues to be used:

1. Precision Channel Formation

Brick allows skilled masons to form the invert to match pipe diameter, slope, and alignment. This creates a defined wastewater channel that supports efficient movement through the manhole.

In rehabilitation projects — where existing structures may be irregular or deteriorated — this level of control is especially important.

2. Adaptability During Restoration

Unlike fully poured systems, brick can be shaped and adjusted on site to match existing conditions. That flexibility is often valuable when restoring aging sanitary sewer manholes.

3. Serviceability

Depending on the extent of deterioration, sections of a brick sewer invert can often be rebuilt without replacing the entire structure — helping extend the usable life of the manhole.

4. Defined Flow Path

When properly formed, a brick invert helps create a consistent channel that supports consistent wastewater flow through the structure and reduces areas where debris may collect. Proper shaping — more than the material itself — is what influences a hydraulic performance.

Why Not Just Use Concrete?

Concrete inverts are also common, and in many cases they are appropriate. The choice between brick and other materials depends on project conditions, structural requirements, environmental exposure, and long-term performance goals.

In sanitary sewer environments, material selection must consider factors such as moisture, abrasion, and potential chemical exposure. Historically, brick has been used in sewer structures not only for its workability and adaptability during construction, but also because properly specified masonry materials have performed reliably in these conditions.

Brick is often selected in sanitary sewer manhole restoration because it allows for:

• • Controlled shaping inside confined structures
  • Precise alignment with existing pipe connections
  • Targeted reconstruction in deteriorated areas

Material selection should always be based on site conditions, environmental factors, and project requirements — not appearance.

When Is a Brick Sewer Invert the Right Choice?

Brick inverts are commonly used in sanitary sewer manholes when:

• • The existing invert has deteriorated
  • The flow channel needs reshaping
  • Manhole rehabilitation is underway
  • Precise channel reconstruction is required

Every structure is different. Material choice depends on system condition, environmental exposure, and long-term maintenance considerations.

Protect Your Sewer Structures Before Small Issues Escalate

Deteriorated sewer inverts can contribute to infiltration, material breakdown, flow obstruction, and progressive structural damage if left unaddressed.

Evaluating the condition of sanitary sewer manholes — including the invert — is an important part of maintaining long-term system performance.

The Bottom Line

Brick sewer inverts are getting attention because they combine visible craftsmanship with practical infrastructure function.

They allow for precise channel formation within sanitary sewer manholes and, when properly constructed, support consistent wastewater flow and structural rehabilitation efforts.

At Savy & Sons, we restore and construct brick sewer inverts as part of comprehensive sewer structure rehabilitation — helping municipalities and property owners extend the life of their underground infrastructure.

If you have questions about brick inverts or sanitary sewer manhole restoration, we’re here to help.