Water supply valves from Union Valve provide dependable isolation, flow management and reverse-flow protection for treatment plant outlets, transmission mains, reservoirs, distribution networks and building service connections.
✓ Gate, butterfly, check and ball valve options for key water-supply duties
✓ Selection based on pipeline function, DN, pressure rating, connection type and actuation
✓ Materials and product standards matched to water quality and project requirements
From the treatment plant outlet to the final building connection, valves divide the network into controllable sections for isolation, reverse-flow protection and maintenance.
Isolates treated-water outlet lines and valve stations during inspection or maintenance.
Typical valve: Butterfly valveProvides sectional isolation on large-diameter trunk pipelines carrying water over long distances.
Typical valve: Butterfly valveControls and isolates reservoir inlet and outlet pipelines for storage operation and maintenance.
Typical valve: Butterfly valveCreates isolation zones so selected pipeline sections can be maintained without shutting down the full network.
Typical valve: Gate valveProvides branch isolation and maintenance access between the main distribution line and local service areas.
Typical valve: Gate valveProvides local shut-off at building entries and equipment connections, subject to pipe size and layout.
Typical valve: Butterfly or ball valveApplication note: This is a simplified network overview. Final valve type, size, materials and operation method should be confirmed from the DN, pressure, flow conditions, connection and project standard.
• 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
• 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
• 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.
• 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.
Confirm these six points before selecting valves for municipal transmission, distribution or building water-service pipelines.
Selection focusFunction determines the appropriate valve family.
Selection focusWater quality determines wetted materials, coating and approval scope.
Selection focusThese values affect sizing, torque, pressure loss and closing behaviour.
Selection focusConfirm mating dimensions before ordering to avoid site-fit conflicts.
Selection focusVerify the exact material grade and elastomer compound.
Selection focusFor actuated valves, also provide the power supply and control signal.
WRAS, NSF/ANSI 61 and WaterMark documents apply only to the product, size, material and configuration stated in the current certificate scope.
EN 1074, BS 5163, AWWA C509/C515, AWWA C504, API 609, MSS SP-67, EN 558 or API 598 may apply depending on the selected valve and project.
Send your valve schedule, drawings or project requirements. Include the application, size, pressure rating, connection type, operating method and required approvals so we can review the appropriate configuration.
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.
Yes. Butterfly valves are widely used in large water pipelines due to their compact design, light weight and easy operation.
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.
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.
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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