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Valve Solutions for Water Supply Systems

Water supply valve solutions for municipal distribution and transmission pipelines

Valves for Water Supply Systems

Gate, butterfly, check and ball valve solutions for municipal transmission, distribution and building water-service pipelines.

✓ Isolation, control and reverse-flow protection
✓ Configurable materials, connections and operators
✓ Support for EN, BS, AWWA and project-specific requirements

Share your DN, pressure rating, medium, connection and project standard.

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Valve Functions Across a Water Supply Network

Treatment Plant Outlet

Valve stations for treated water outlet control and pipeline maintenance.

Recommended: Butterfly Valves

Transmission Main

Large-diameter pipelines requiring reliable isolation and flow management.

Recommended: Butterfly Valves

Reservoir / Storage

Inlet and outlet control for storage, isolation and water-level management.

Recommended: Butterfly Valves

Distribution Network

Sectional isolation and network zoning for reliable water distribution.

Recommended: Gate Valves

District Branch

Branch pipeline isolation and maintenance access.

Recommended: Gate Valves

Building Service Connection

Local shut-off and equipment connection requirements.

Recommended: Butterfly Valves

Recommended Valves for Water Supply Applications

Gate Valves

• For pipeline zoning and fully open or fully closed isolation.Relatively unobstructed flow path when fully open.
• NRS configurations suit buried or limited-space installations
• Confirm body, stem, rubber-coated wedge, coating andoperator.

Project directions: BS 5163, EN 1074 and AWWA C509/C515

View Gate Valves

Butterfly Valves

• Compact construction for medium- and large-diameter
pipelines.
• Wafer, lug and double-flanged connections.
• Handle, gearbox or actuator operation.
• Select concentric or double-eccentric designs by project
duty.

Project directions: AWWA C504, API 609, MSS SP-67 and EN 558

View Butterfly Valves

Check Valves

• Used to limit reverse flow in water supply pipelines.
• Swing check valves suit selected stable, lower-velocityduties.
• Dual-plate designs provide a more compact installation.
• Silent check valves provide a faster closing response.

Confirm flow velocity, installation direction, pressure loss and closing
characteristics.

View Check Valves

Ball Valves

• Suitable for smaller branch pipelines and equipment isolation.
• Quick quarter-turn operation.
• Suitable for selected frequently operated positions.
• Confirm body, ball, seat material and connection type.

Ball valves should not be confused with mainline isolation solutions for large municipal pipelines.

View Ball Valves

Materials and Standards for Potable Water Service

Valve suitability for potable water depends on the materials, elastomers, coatings and approval scope of the selected product. Each wetted component should be checked against the water quality, temperature and project specification.

01

Valve Body

Body material should be selected according to pipeline duty, pressure, corrosion conditions and project requirements.

  • Ductile iron: a primary material direction for many water-distribution and municipal pipeline applications.
  • Cast iron: available for selected water-service configurations.
  • Carbon steel: considered when the design or project specification requires it.
  • Stainless steel: considered for specific corrosion, hygiene or material requirements.
Confirm the body grade, pressure rating, wall design and applicable product standard for the selected valve.
02

Seat and Sealing Materials

The sealing material must match the water type, operating temperature and required drinking-water approval.

  • EPDM: commonly considered for clean-water service, but potable-water suitability depends on the exact compound and approval scope.
  • NBR: selected for suitable media and operating conditions rather than promoted as the default potable-water option.
  • FKM: considered for specific chemical or temperature requirements.
  • PTFE: selected where its chemical and temperature characteristics match the application.
Do not assume that every EPDM compound, valve size or product family is covered by the same approval.
03

Internal and External Coating

Coating requirements should be confirmed through the applicable product specification and inspection documents.

  • Coating type: confirm for the selected product.
  • Thickness range: confirm against the project specification.
  • Surface preparation: confirm the preparation method and grade.
  • Potable-water evidence: verify the scope of supporting documents.
  • Inspection: confirm whether holiday, adhesion or other tests are required and available.
Specific coating thicknesses or test values should only be published after verification against internal production and inspection data.

Standards and Their Application

The applicable standard depends on the valve type, project location, owner specification and required verification tests.

Standard or approval How it applies on this page
EN 1074 / EN 1074-2 Fitness-for-purpose and performance direction for valves used in water supply systems. EN 1074-2 specifically addresses isolating valves connected to water supply pipelines, including above- and below-ground installations and water intended for human consumption.
BS 5163 Project requirements for resilient seated gate valves used in waterworks applications.
AWWA C509 / C515 Project directions for resilient seated gate valves. Confirm which standard and valve construction are specified.
AWWA C504 Project direction for rubber-seated butterfly valves used in water-service applications.
API 609 / MSS SP-67 Design and product requirements relevant to selected butterfly valve constructions and project specifications.
EN 558 Face-to-face and centre-to-face dimensional requirements for applicable valve types.
API 598 Inspection and pressure-testing direction where specified by the project or applicable product requirements.
WRAS / NSF/ANSI 61 / WaterMark Drinking-water contact compliance direction. Always confirm the certificate holder, product type, material, size range and other limitations stated in the current approval scope.

FAQ About Water Supply Valves

What Valves Are Commonly Used in Water Supply Systems?

Common valves used in water supply systems include gate valves, butterfly valves, check valves and ball valves. The selection depends on pipeline function, diameter, pressure rating and installation requirements.

Are Butterfly Valves Suitable for Large Water Supply Pipelines?

Yes. Butterfly valves are widely used in large water pipelines due to their compact design, light weight and easy operation.

Which valve is best for isolating a municipal water pipeline?

There is no universal best choice. Gate and butterfly valves should be compared by flow path, installation space, pressure loss, operating method and project standard—not nominal size alone.

Which seat material is suitable for potable water?

EPDM is commonly used for clean water, but the exact compound must match the water quality, temperature and required drinking-water approval. Do not assume every EPDM seat or valve size is covered by the same certificate.

Which standards apply to water supply valves?

Requirements vary by region and project. Common directions include EN 1074, BS 5163, AWWA C509/C515 and AWWA C504. Confirm the required design, dimensions, testing and approval scope for the selected valve.

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