Simple, quality design from this top brand makes this a reliable retrofit. Suitable for indirect open-vented or sealed domestic heating and hot water systems, it is economical with low power consumption. Designed for quiet operation, this pump has three speed settings for maximum flexibility when commissioning. Specifications: 230V 50hz. 130mm port to port. Max. temp. range: +5°C to +110°C. Weight: 2.6kg.