Superior Signal 15-L/25-L "High Output" Manhole Liquid Smoke Blower

Superior Signal 15-L/25-L "High Output" Manhole Liquid Smoke Blower

The Superior Signal 15-L/25-L "High Output" Manhole Liquid Smoke Blower is a smoke generation system designed for sewer line testing, leak detection, and confined-space inspection

Model 25-L includes an auxiliary outlet with a removable cover and adjustable damper to direct air/smoke through the base or auxiliary outlet. The auxiliary outlet is designed for applications where smoke must be introduced into openings other than manholes.

Description: 

Superior Signal 15-L & 25-L “High Output” Manhole Liquid Smoke Blowers

The Superior Signal 15-L and 25-L “High Output” Manhole Liquid Smoke Blowers are smoke generation systems designed for sewer testing, leak detection, and confined-space inspection. Both models are engineered to produce high-volume dry smoke output, supporting the identification of leaks, breaks, and unauthorized connections in underground systems.

High Output Smoke Generation for Large Systems

High-output liquid smoke blowers are commonly used by municipalities, contractors, and fire departments when standard smoke systems cannot generate sufficient volume or pressure.

Both the 15-L and 25-L models deliver approximately 4,000 CFM at 4.0 static pressure, allowing smoke to travel through larger or more complex sewer systems requiring increased airflow and pressure.

Dry Smoke Performance

These systems are designed to produce dry smoke output, reducing moisture and residue compared to traditional liquid smoke systems.

• Large insulated and baffled heating chamber supports efficient fluid-to-smoke conversion
• Stainless steel precision-machined injector nozzles regulate fluid delivery
• Micro-control flow valves provide consistent output control
• Designed to minimize “wet smoke” conditions during operation

Controlled Airflow and Operation

A precision control valve and adjustable airflow settings allow operators to regulate smoke output based on system size and testing requirements.

• Field-adjustable CFM and static pressure
• Designed for controlled smoke introduction and distribution

Model Differences: 15-L vs 25-L

While both models share the same airflow performance and core system design, the 25-L model includes additional flexibility for specialized applications.

15-L Model:
• Standard high-output configuration for manhole-based testing

25-L Model:
• Includes auxiliary outlet with removable cover and adjustable damper
• Allows smoke introduction through alternate access points such as cleanouts or building connections

Durable Field Construction

Both units are built for repeated use in municipal and field environments.

• Single-unit metal construction
• Mounted on 27.5" custom fiberglass base
• Integrated carrying handles for transport
• Approx. 65 lb carrying weight

Power System

• Powered by Briggs & Stratton 3.5 HP gasoline engine
• Designed for portable field operation

Compliance and Standards

• Meets recommendations of WEF, EPA, and NASSCO
• Designed for use in sewer inspection and testing programs