Reflex expansion vessel REFIX DD white. 10 bar, 18 l: for drinking water, pressure boosting, and water heating systems according to DIN 1988. Stainless steel connection, flow-through with high-flow flow star. Membrane according to DIN EN 13831/DIN 4807 T5/KTW-C and W 270. Built and tested according to DIN 4807 T5. Approval in accordance with the Pressure Equipment Directive 97/23/EC. Coated inside and out according to KTW-A. Pre-charge 4 bar. Compatible with Flowjet flow control fitting. Up to 70 °C. Additional technical properties: Pressure class flange: other, suitable for cooling: No, suitable for drinking water: Yes, suitable for central heating: No, medium temperature (continuous operation): -10.00 degrees Celsius, with replaceable membrane: No, with mounting material: No, with feet: No, with pressure gauge: No, with safety valve: No, nominal diameter of expansion connection: 3/4 inch (20), horizontal placement: No, vertical placement: Yes, outside diameter of expansion connection: 26.90 mm, material membrane/bellows: Butyl rubber IIR, max. operating pressure: 10.00 bar, max. glycol mixture: 0.00%.