Bends of hoses and tubes of the line at small angles are not allowed. The bend radius must be at least 10 times the hose diameter. The hoses must run at least 80 mm from the exhaust manifold. It is recommended to check the condition of the hoses at least once a year. When repairing (after depressurization of the highway in a car service) the hoses must be plugged, the ingress of dirt into the tubes is not allowed.