| CPC E03C 1/084 (2013.01) | 18 Claims |

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1. A sanitary insert part (1), comprising:
at least one flow-determining functional unit (2);
a diffusor (4) which in a flow direction (3) is disposed after the flow-determining functional unit (2), the diffusor (4) has a diffusor space (5) partially delimited by an impact face (6) which deflects in a lateral direction water flowing into the diffusor space (5);
a plurality of outlet openings (7) leading from the diffusor space;
wherein the impact face (6) is adjoined by a drainage ramp (8) which allows water impacting the impact face (6) and draining therefrom in a use position to drain in a direction of the outlet openings (7), and
wherein an outer edge of the drainage ramp (8) is formed by a step (22) which leads to a collection chamber (21) of the diffusor space (5) that in the flow direction (3) is disposed downstream of the drainage ramp (8), and wherein the collection chamber (21) leads to the plurality of outlet openings (7);
a housing (16) in which at least one of the diffusor (4) or the at least one flow-determining functional unit (2) is inserted, the housing (16) has an encircling wall (17) which laterally delimits a trap (18) that in the flow direction (8) is disposed downstream of the outlet openings (7); and
at least one splitter element (19) disposed at least one of at or on the impact face (6), and the at least one splitter element (19) is in each case disposed ahead of an outlet opening (7).
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