IAPMO PS 054-2021a Metallic and Plastic Utility Boxes

Industry Standard for Metallic and Plastic Utility Boxes

This Standard covers utility boxes intended for plumbing applications (e.g., washing machines, ice makers, tubs, gas appliances, and air admittance valves) and made of
(a) acrylonitrile‐butadiene‐styrene (ABS);
(b) polystyrene (PS);
(c) polyvinylchloride (PVC);
(d) steel; or
(e) a combination of the materials listed in Items (a) to (d).

This Standard specifies requirements for materials, physical characteristics, performance tests, and markings.