11.4.9. The hose, pump and all equipment coming into contact with milk or the other food products referred to in section 11.4.6 must be(1) smooth, washable, impervious, corrosion-resistant and free of cavities and cracks;
(2) non-toxic and resistant to washing and sanitizing operations;
(3) unaffected by milk and manufactured so as not to affect the milk or other products; and
(4) protected against any source of contamination.