Submersible Drainage Pump Overview
This document provides technical specifications and features of the CSP submersible drainage pumps, available with either a vertical float switch or a wide-angle float switch. The pumps are designed for automatic operation and are suitable for various drainage applications.

Performance Specifications
The performance of the pumps is presented in terms of flow rate (liters per hour) against discharge head (feet). The performance may vary slightly between individual pumps.

• CSP521 and CSP521T: 1/4 HP, with a maximum flow rate of 11,300 LPH at lower heads.
• CSP551 and CSP551T: 1/2 HP, with a maximum flow rate of 12,000 LPH at lower heads.

Motor Specifications
The pumps are equipped with an oil-filled, thermally protected motor operating at 230V, 50Hz, and 2850 RPM. This ensures efficient energy use and better heat dissipation.

Design and Construction
The pumps feature a rugged cast iron housing, impeller, and motor casing. They include a stainless steel shaft and fasteners, and are equipped with permanently lubricated ball bearings for durability. The pumps come with a 15-foot grounded power cord and a 1-1/2” BSP discharge pipe size.

Additional Features
Optional features include a sic/sic mechanical shaft seal for pumping sandy water. The pumps are provided with a 1-1/2" flexible hose connection and clamp.

Dimensions and Weight
The dimensions and weight vary slightly between models, with the CSP521 and CSP521T having a net weight of 9 kg and the CSP551 and CSP551T weighing 10 kg. The gross weight is slightly higher due to packaging.

Installation Requirements
The minimum sump pit diameter required for installation is 12 inches for the CSP521 models and 15 inches for the CSP551 models.