The Pentax DH-100 is a robust submersible drainage pump designed for heavy-duty site drainage, clean and dirty water removal, and municipal or construction dewatering tasks. Built by Pentax, this high-head 230V model offers reliable performance and long service life for contractors and professionals who need a dependable drainage solution.

Key specifications

• Voltage: 230V single-phase
• Motor power: 1.37 kW
• Max flow: up to ~320 L/min (approx. 301–350 L/min range)
• Max head: ~19 m
• Outlet: 1½" (1.5" BSP female)
• Solids handling: up to 10 mm
• Cable: 10 m power cable
• SKU / Code: 020-616 (manual version)

These performance figures make the DH-100 ideal as a high-head submersible pump for rapid basin emptying, trench and site drainage, or emergency flood response.

Construction & durability

Engineered for tough environments, the DH-100 features a cast iron pump body, brass open impeller, stainless steel motor cover and AISI 430 shaft. A double mechanical seal with an oil barrier (silicon carbide on the pump side) protects the motor for extended life, while the IPX8 submersible rating ensures continuous underwater operation when required. These materials and sealing systems minimize wear and reduce maintenance on abrasive or dirty water applications.

Available in manual (SKU 020-616) and automatic variants (float switch option), the DH-100 covers both fixed-install and portable pumping needs. Typical uses include site drainage, builder’s works, basement pumping, washdown water removal, and general clean/dirty water handling. Its solids-handling capability, high flow and compact footprint make it a versatile choice for contractors, plumbers and facilities teams seeking a dependable Pentax submersible drainage pump.