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IS 909:1992 is the Indian Standard (BIS) for underground fire hydrant, sluice valve type. This standard specifies the materials, dimensions, manufacture, and testing requirements for underground fire hydrants of the sluice valve type. It is utilized by fire protection and public health engineers to specify reliable underground hydrant connections for municipal and facility water distribution systems.
Specification for Underground Fire Hydrant, Sluice Valve Type
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! The duck foot bend must be adequately supported by a concrete thrust block to counteract water pressure surges and operational forces.
! Ensure the surface box over the hydrant is installed flush with the finished ground or pavement level to prevent tripping hazards while retaining quick accessibility during emergencies.
BS 750:2012BSI — British Standards Institution, United Kingdom
HighCurrent
Specification for underground fire hydrants and surface box frames and covers
Specifies requirements for underground hydrants, including the sluice valve type (Type 1).
EN 14339:2005CEN — European Committee for Standardization, Europe
HighCurrent
Underground fire hydrants
Covers design, performance requirements, and testing for underground fire hydrants in European countries.
AS 2419.2-2009Standards Australia, Australia
MediumCurrent
Fire hydrant installations - Part 2: Fire hydrant valves
Specifies the valve component for hydrant systems, which is part of the assembly covered by IS 909.
AWWA C503-16AWWA — American Water Works Association, USA
LowCurrent
Wet-Barrel Fire Hydrants
Covers wet-barrel hydrants, but typically in an above-ground form factor, not the fully buried type.
Key Differences
≠IS 909 specifies a screwed round thread outlet (per IS 2643), whereas BS 750 specifies a bayonet type or BS 336 screwed outlet, and EN 14339 allows for various national connection types. This makes them incompatible without adapters.
≠Modern standards like EN 14339 and BS 750 mandate or strongly prefer ductile iron for the body for enhanced strength and durability, while the older IS 909:1992 specifies grey cast iron (Grade FG 200).
≠Anti-corrosion coating requirements differ significantly. IS 909 requires a basic bituminous paint, while EN 14339 specifies a much more robust and thicker (250 µm) fusion-bonded epoxy coating.
≠EN 14339 specifies a quantitative maximum operating torque (e.g., 80 Nm for DN 100), whereas IS 909 only has a qualitative requirement that the hydrant be operable by one person, without defining a maximum force.
Key Similarities
≈All standards cover the fundamental design of a sluice valve (or gate valve) type hydrant intended for burial below ground level, accessed through a surface box.
≈All specify mandatory hydrostatic pressure testing for both the hydrant body (shell) and the valve seat to ensure structural integrity and water tightness under pressure.
≈The nominal sizes covered are consistent, with all standards including provisions for DN 80 and DN 100 hydrants.
≈All standards require the hydrant to be clearly marked with essential information such as the manufacturer's identity, nominal size (DN), and pressure rating (PN).
Parameter Comparison
Parameter
IS Value
International
Source
Body Material (Primary)
Grey Cast Iron (FG 200 of IS 210)
Ductile iron (BS EN 1563) or Grey cast iron (BS EN 1561)
BS 750:2012
Body Hydrostatic Test Pressure (for PN 1.6 / PN16)
2.4 MPa (24 bar)
PFA x 1.5 (e.g., 16 bar x 1.5 = 24 bar)
EN 14339:2005
Seat Hydrostatic Test Pressure (for PN 1.6 / PN16)
1.6 MPa (16 bar)
PFA x 1.1 (e.g., 16 bar x 1.1 = 17.6 bar)
EN 14339:2005
External Anti-Corrosion Coating
Anticorrosive paint of a bituminous nature
Epoxy coating with a minimum thickness of 250 µm
EN 14339:2005
Outlet Connection
Screwed round thread as per IS 2643 (Part 1)
Bayonet connection or screwed outlet to BS 336
BS 750:2012
Maximum Operating Torque (DN 80/100)
Not specified quantitatively
80 Nm
EN 14339:2005
Stem / Spindle Material
Copper alloy (e.g., Grade LTB2 of IS 318)
Stainless steel or copper alloy
BS 750:2012
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Nominal inlet size80 mm
Hydrostatic test pressure for body2.0 MPa (20 kgf/cm²)
Hydrostatic test pressure for seat1.4 MPa (14 kgf/cm²)