18 Litre Varem Extravarem Potable Expansion Vessel White 3/4 Connection This Varem Extravarem LC White Potable Water Expansion Vessel comes complete with a fixed membrane for domestic hot water systems. It has a carbon steel body with white epoxy polyester paint finish and stainless steel flange. Specification Dimensions: 415.3 Height x 272 Diameter Max. system temperature: 99ºC Max. pressure of vessel: 8.0 bar Connection: 3/4 Pre-charged to 3.5 bar Our dedicated s team are always willing to help should you require any assistance in choosing the right Expansion Vessel for your system. This is a brand new item and comes complete with the manufacturers standard .