NFP 21-31 Specflex SH Sprinkler Drops Owner’s Manual
- June 16, 2024
- NFP
Table of Contents
NFP 21-31 Specflex SH Sprinkler Drops
Product Information
Specifications
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Model: NFP21XXX
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Standards: Connections as long as the length does not exceed 6ft without seismic escutcheons (oops ring)
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Features: O.D. = 1.10 (28mm)
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Installation
- Ensure the specified length of the SpecflexTM SH Sprinkler Drop does not exceed 6ft without seismic escutcheons.
- Use the approved SH Hose Bracket assembly for installation (refer to SH Hose Bracket Approvals).
- Do not bend the Sprinkler Drop within 2.5 inches from the connection nuts.
FAQ
- What is the maximum length allowed for the SpecflexTM SH Sprinkler Drop without seismic escutcheons?
- The maximum length allowed is 6ft.
- What are the components of the Braided Flexible Hose?
- The components are: Tube, Isolation ring, Sealing gasket, Nut, Nipple (1), Reducer, Braid, Press ring (inner), Press ring (outer).
- What is the minimum bend radius for UL approval?
- The minimum bend radius for UL approval is 4, where C=120.
- What is the minimum bend radius for FM approval?
- The minimum bend radius for FM approval is 8, where C=120.
Standards
National Fire Protection Association (NFPA)
- NFPA 13: Standard for the installation of sprinkler systems
- NFPA 13D: Standard for the installation of sprinkler systems in one- and two-family dwellings and manufactured homes
- NFPA 13R: Standard for installation of sprinkler systems in residential occupancies up to and including four stories in height
- NFPA 13 Section 9.2.1.3.3.3: No hangers are required for flexible connections as long as the length does not exceed 6ft
American Society for Testing and Methods (ASTM)
- ASTM C635: Standard specifications for the manufacture, performance and testing of metal suspension systems for acoustical tile and lay-in panel ceilings
- ASTM C636: Standard practice for installation of metal ceiling suspension systems for acoustical tile and lay-in panels
Factory Mutual (FM), FM Class No, 1637
- Approved standard for flexible sprinkler hose with threaded end fittings
Underwriter’s Laboratories, Inc. (UL), UL 2443
- Standard for flexible sprinkler hose with fittings for fire protection service
International Building Code (IBC) Section 1621/American Society of Civil Engineers (ASCE) 7 9.6.2.6.2 & 9.6.2.6.2.2
- Flexible sprinkler connections are the alternative solution to install without seismic escutcheons (oops ring)
Features
- Available lengths: 31″, 36″, 48″, 60″ and 72″*
- Outlet sizes: 1/2″ and 3/4″
- Max ambient temperature rating: 225° F (UL/FM)
- Max working pressure rating: 175 psi (UL/FM)
- Minimum bend radius:** UL – 4″ / FM – 8″
- Connection: Inlet – 1″ MNPT
- Hose Diameter: I.D. = 0.85″ (21.5mm) O.D. = 1.10″ (28mm)
Technical data
- Hose type: Braided
- Hose: Stainless steel 304
- Nut and nipple: Zinc-plated steel
- Sealing gasket: EPDM
- Press ring (inner and outer): Stainless steel 304
- Isolation ring: Nylon
Installation
Please refer to NFP Specflex Installation Manuals for proper installation guidelines
- ***** 31″ and 72″ currently only available with 1/2″ outlet
- ** DO NOT bend within 2.5″ from connection nuts.
SH hose Bracket Approvals
Bracket / Approved Bracket assembly
- NFP240124 / FM, UL
- NFP240724 / FM, UL
- NFP240624 / FM, UL
- NFP240148 / FM
- NFP2403 / FM
- NFP240424 / FM
BRAIDED FLEXIBLE HOSE
- Tube
- Isolation ring
- Sealing gasket
- Nut
- Nipple (1″)
- Reducer
- Braid
- Press ring (inner)
- Press ring (outer)
Friction Loss Data
- *UL: 4″ minimum bend radius, where C=120
- *FM: 8″ mimimum bend radius, where C=120
Ordering Code Matrix
©2023 Ferguson Enterprises, LLC 1123 60398944
References
Read User Manual Online (PDF format)
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