- Product Thermsaver Internal 130ltr Direct S/S Unvented Cylinder successfully added to compare list
- Product Thermsaver Internal 130ltr Direct S/S Unvented Cylinder successfully added to compare list

Internal Expansion Vessel

Internal expansion vessel stainless steel unvented cylinder has the expansion vessel/space inside the cylinder which saves on pipe work, space and time on installation. It still gives you the same megaflow performance of high pressure hot water when used in conjunction with a heat source and attached to the mains pressure cold water. They are available in the thermsaver Vertical cylinder only.