The KOSHIN SEH-25H is a portable, heavy-duty centrifugal clear-water pump engineered for irrigation, garden maintenance, small-scale dewatering and general water transfer. Powered by a reliable Honda 4‑stroke engine and built with cast-iron impeller components and a die-cast aluminum housing, the SEH-25H delivers consistent flow and long service life for agricultural, residential and light commercial applications. Ideal uses include sprinkler irrigation, pond filling/draining, well pumping and emergency water removal.

Key features & benefits

• 1" (25 mm) suction/discharge with outer pipe thread (BSP or NPT) — easy hose and fitting compatibility.
• Maximum delivery up to ~135 L/min and total head up to 43 m for strong lift and throughput.
• Honda GXH50 49.4 cc air‑cooled 4‑stroke gasoline engine for dependable starting and fuel efficiency.
• Durable cast-iron impeller and volute with mechanical ceramic-carbon seal for abrasion resistance and long life.
• Lightweight, rugged roll-cage frame for portability and protection on job sites.

These construction and engine choices make the SEH-25H a top option when you need a portable, self-priming clear water pump that balances performance, durability and ease of maintenance.

Typical specifications

• Connection: 25 mm (1") outer pipe thread
• Max flow: ~135 L/min (approx. 8,100 L/hr depending on head)
• Max total head: 43 m
• Max suction lift: ~8 m
• Engine: Honda 4‑stroke, 49.4 cc (GXH series)
• Net weight: ~11.5 kg
• Included: strainer, hose couplings, hose clamps, engine tool set

For installers, landscapers and farmers seeking a compact, reliable 1" centrifugal pump with proven Honda power and Koshin build quality, the SEH-25H offers an excellent balance of performance, portability and serviceability. Search terms to help find this product: KOSHIN SEH-25H, 1 inch water pump, Honda GXH50 pump, clear water centrifugal pump, portable irrigation pump.