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XPS series expansion tanks absorb hot water expansion in closed heating systems in larger installations. They have butyl diaphragms to separate clamped design, keep fluids circulating and maintain minimum system pressure.
Honeywell XPS Series XPS-110V Expansion Tank, 62 gal Capacity, 1-1/4 in, FNPT, Steel, 100 psi, 46-3/4 in H x 22 in Dia