USP-250P / USP-400P /                                                                                 
USP-550P / USP-750P
Single phase 115V/60Hz, 3450RPM
Thermoplastic housing and impeller
Patent design with check valve
To equip float switch

USP-257PC / USP-407PC /
USP-557PC / USP-757PC

Single phase 115V/60Hz, 3450RPM
Thermoplastic housing and impeller
Insulation class: B
Mechanical built-in automatic water level control

USP-400S / USP-550S / USP-750S

USP-402S / USP-552S / USP-752S

Single phase 115V/60Hz, 3450 RPM
Motor with thermal overload protector to prolong the product life
Anti-rust and anti-corrosion stainless steel housing and plastic impeller
Anti-airlock air bleeding hole design
Float switch is available