... polyurethane12, thickness of heat insulation layer: 50mm to 60mm13. pressurized system: 0.6MP14, material of support: Aluminum Alloy15, color of ... under pressure 1.5kgf/m2, directly connect the tap water system, working pressurized and automatically. 3. The water tank and ... , 000 times high pressure test without any damage. 5. Polyurethane foam, high density with small cell. Good obstruction. The inner ...