Melanie E. La Rocca
Mohammad Ahasan, P.E.
280 Boradway, 7TH Floor
December 17, 2021
Jeffrey A Chalfin
Dear Jeffery Chalfin,
Thank you for submitting the OTCR1 Alternate Material Acceptance Application dated 8/10/2021 for the above referenced project evaluating a flow management valve for acceptance in NYC. The application includes the following:
Identification of Uses. Flow management valve is a plumbing device that has multiple uses. The primary use of this valve is to improve water meter accuracy for the water consumer by managing the point of pressure drop within a water system. This valve creates a smooth, laminar flow; and maintains, as near as possible, city static pressure upstream; and prevents the expansion of the air volume in the system which the water meter would otherwise measure as water volume.
Other possible uses include protecting the plumbing system from damage due to pressure surges or shockwaves, preventing backflow, mitigating overly high pressure downstream, and potentially eliminating air hammering when installed downstream of an air hammering location.
Description. The Flow Management Valves are construction of various materials used in plumbing applications, including acetyl and stainless steel. It replaces a small section of existing pipe and consists of a main body with plumbing connections at both ends. It is available in multiple sizes to match most standard water pip sizes.
The NYC Construction Codes recognizes multiple types of valves used in plumbing systems. However, the Code does not prescribe requirements for Flow Management Valves.
Therefore, pursuant to AC 28-113.2.2, the Office of Technical Certification and Research (OTCR) has evaluated flow management valves as an alternative. Accordingly, an acceptable alternative must comply with the intent of the code and must be equivalent of that prescribed in the code in quality, strength, effectiveness, fire resistance, durability, and safety. OTCR’s evaluation of the FMV concluded it is an acceptable alternative to the code based on the follow:
Functionality testing was performed by Texas A&M Engineering Experiment Station to evaluate for equivalent safety and performance based on flow rates, pressure surges, air bubble test, includes the following:
Effects on safe drinking water was evaluated in accordance with NSF/ANSI 61, Standards for Safe Drinking Water. The FMV test demonstrated compliance with NSF 61.
Additionally, the Flow Management Valve shall comply with additional provisions of the NYC Construction Codes and the following applicable provisions:
This OTCR Final Acceptance Letter will be scanned and included in the Departments’ BSCAN Virtual Job Folder as part of the project record. Please refer to the above referenced OTCR Submittal Code in any future correspondence.
Mohammad Ahasan, P.E