The KOSHIN KTH-100S is a heavy-duty, engine-driven 4" (100 mm) trash pump engineered for high-capacity dewatering, construction site drainage, agricultural irrigation and emergency flood response. Built for abrasive, sandy and muddy water, this portable, self-priming pump pairs industrial-grade materials with a Honda GX-series engine for reliable field performance and long service life.

Key specifications & performance

• Maximum flow: 2050 L/min (≈542 USG/min).
• Maximum total head: 30 m (98 ft); maximum suction lift: 8 m (26 ft).
• Solids handling: up to ~27 mm (robust trash-capable impeller).
• Engine: Honda GX390 (389 cc) 4‑stroke gasoline engine with low-oil shutoff.
• Mechanical seal: silicon carbide (SiC x SiC) for superior abrasion resistance.
• Pump end: high-chrome cast iron impeller and spheroidal graphite (ductile) iron volute; powder-coated roll cage for protection and portability.
• Net weight: ~79.5 kg; compact footprint for site mobility.

Specifications above are taken from manufacturer and authorized reseller listings; actual model subcodes and accessory kits may vary by region.

Durability, serviceability & accessories

Designed for low maintenance, the KTH-100S features a removable cleanout cover (no hose removal required), an improved impeller design with a hexagon boss for quick removal, and durable SiC seals to reduce wear from abrasive solids. Typical scope of delivery includes strainer, hose couplings, hose bands and an engine tool set; optional parts and full documentation are available from Koshin distributors. These design choices emphasize uptime for contractors, landscapers and municipal crews.