The CAL-PRO expansion vessels absorb the water volume variations in closed heating systems maintaining constant pressure, helping to reduce energy consumption Painted externally with long-lasting epoxy polyester Pre charged and 100% factory tested Compatible with Zilmet sealed system kit (ZKITA075) and wall mounting bracket for quick installation Brand:Zilmet Manufacturer Stock Code:1300001200 Height:281 mm Diameter:294 mm Weight:3.65 kg Manufacturer Guarantee:5 years Sub-Category:Expansion Vessels Colour:Red Brand:Zilmet Maximum Pressure:4 Pack Size:1 Capacity:12 L Category:Cylinders Type:Heating