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This part of EN 1151 establishes general principles for the construction, use and testing of circulation pumps of the glandless type, having a rated power input P1 200 W, intended to be used in heating installations and domestic hot water service installations. However, this decision depends on agreement between the supplier and purchaser. Circulation pumps with a rated power input above 200 W for professional/commercial use are excluded from the scope of this document. This document applies to: a) A.C. circulation pumps having a rated power input P1 200 W intended for use in ordinary heating water systems with a maximum permissible inlet temperature of TF 110 C and a maximum outlet working pressure p2max o 6 bar. b) A.C. circulation pumps having a rated power input P1 200 W intended for use in domestic hot water installations with a permissible inlet temperature of TF 65 C and a maximum outlet working pressure p2max o 10 bar. This document applies to circulation pumps, which are manufactured after the date of issue of this document. This document covers the performance for circulation pumps. All known hazards which are likely to occur at normal installation and operation are covered by the European Standards EN 809 and EN 60335-2-51. As regards safety for electrotechnical parts of circulation pumps, EN 60335-2-51 applies.