Vaillant Expansion Vessel 181051

This expansion tank, an official Vaillant replacement part, is designed for use with ecoMAX VUW (condensing), ecoTEC VU (condensing), ecoTEC VUW (condensing), Home (condensing), Guernsey/Jersey (condensing) only, ecoMAX VU (condensing), ecoTEC VUI (condensing) ) and VWL (Heat Pump Accessories). An expansion tank, a chamber designed to protect a water heating system from overpressure, is filled with air that acts as a buffer against pressure surges in the system. This part fits: ecoMAX 613 VU 126 E-C ecoMAX 613/2 E VU 126/2-C ecoTEC plus ecoTEC plus 612 VU 126/3-5 ecoMAX 835 E VUW 356-C ecoMAX 828 VUW 286 E-C ecoMAX 824/2 E VUW 246/2-C ecoMAX 635 VU 356/2-C ecoMAX 622/2E VU 226/2-C ecoMAX 618/2 E VU 186/2-C ecoMAX 618 VU 196 E-C Show More Show Less