N.Y. Comp. Codes R. & Regs. tit. 1, § 271-4.9 – In-place cleaning.

(a) cleaning and sanitizing solutions can be circulated throughout a fixed system using an effective cleaning and sanitizing regimen;
(b) cleaning and sanitizing solutions will contact all interior food-contact surfaces; and
(c) the system is self-draining or capable of being completely evacuated.

Equipment intended for in-place cleaning shall be so designed and fabricated that: