Suttner ST-36 Pit Boss Sludge Sucker — pressure-washer vacuum head, 15 ft hose, up to 2,500 GPH

The Suttner ST-36 Pit Boss Sludge Sucker is a pressure-washer-driven vacuum head that clears sludge, slurry, and liquid waste up to about 2,500 gallons per hour when paired with a 4 GPM pressure washer.

Designed for industrial wash bays, tanks, pits and other confined liquid-holding areas, the ST-36 converts the power of your pressure washer into a high-capacity sludge extraction tool. Its compact base mounts to a standard pressure-washer lance with a quick coupler, and a 15-foot, 1½-inch discharge hose carries the sucked material to a disposal container. By using a high-pressure venturi effect and a 0° nozzle, the unit lifts settled solids and ejects them rapidly—giving you a cost-effective alternative to manual or outsourced pit cleaning.

How does the ST-36 attach to and work with my existing pressure washer?

The Pit Boss couples directly to a pressure-washer lance using a quick coupler for fast setup. Once connected, its 0° tip focuses the water jet to create strong suction that lifts sludge, which is then pushed through the discharge hose to a waste tank. Performance scales with the pressure washer’s flow and PSI within the recommended range.

• Quick-coupler connection to standard pressure-washer lances for tool-free attachment
• Operates safely between 1,000 and 3,000 PSI for optimal venturi suction
• Compatible with pressure washers up to 4 GPM to reach quoted capacity figures
• 15-foot, 1½-inch discharge hose routes waste to a separate containment tank

What removal rate and material types can I expect the Pit Boss to handle?

When paired with a 4 GPM pressure washer, the ST-36 can remove up to approximately 2,500 gallons per hour of liquid waste and slurry; lower-flow washers produce proportionally less throughput. It’s built to vacuum water, mud, sludge and sewage-like slurry from pits, tanks and sumps, not to replace grinders or macerators for large solids.

• Rated removal rate: up to ~2,500 gallons per hour on a 4 GPM machine
• Effective for water, mud, sludge, and slurry found in pits and tanks
• Not intended for removing large unbroken solids or thick debris without pre-screening
• Works best when solids are loosened by the pressure washer jet before suction

How do I operate and adapt the unit for different tank or pit conditions?

Position the ST-36 at the pit or tank bottom using the lance; the focused 0° nozzle maximizes suction and ejection efficiency. You can adjust pressure and flow within the 1,000–3,000 PSI window to match the consistency of material being removed. For heavier or coarser sludge, pre-rinse or agitate to break up compacted deposits before suctioning.

• Use a 0° pressure tip to concentrate jet force for maximum lift and ejection
• Adjust washer PSI and GPM to match slurry viscosity and tank geometry
• Pre-agitate dense deposits with rinse or mechanical means for better throughput
• Route the 15-foot discharge hose to a collection tank or approved disposal container

What maintenance and safety steps should I follow with the ST-36?

Routine inspection and basic care keep the Pit Boss reliable: check quick couplers, hose integrity and nozzle condition before each use. Flush the assembly with clean water after every job to prevent clogging from sticky slurry. Follow standard confined-space and waste-handling safety for disposal and PPE when working with sewage or hazardous fluids.

• Inspect quick coupler and lance seal for wear before use
• Flush unit with clean water to remove residue after each operation
• Replace worn nozzles or hoses to maintain suction performance
• Follow PPE and local disposal regulations when handling contaminated waste

Who is this for: The Suttner ST-36 Pit Boss is aimed at automotive shops, industrial facilities, fleet maintenance yards, municipal services and contractors that need an economical, pressure-washer-driven option to remove liquid waste and settled sludge from pits, tanks and sumps. It suits teams that already own a compatible pressure washer and want to reduce off-site cleaning costs or speed up routine pit maintenance without investing in large vacuum trucks.