Heatline Capriz Plus: 24, 24A, 28, 28A. Heatline Monza: 24, 24A, 28, 28A. (Note: Always verify this exact part number D003202389 against your boiler's technical parts diagram before ordering). Heating engineers know that attempting to reuse old, distorted rubber seals or slapping silicone sealant on hydraulic connections is an invitation for a localized leak and an expensive call-back.
