What is C900 Water Pipe

What Is C900 Water Pipe?

C900 water pipe refers to a type of polyvinyl chloride (PVC) pressure pipe that complies with the American Water Works Association (AWWA) C900 standard. It is most commonly used in 4 to 12 inch diameters and is rated for pressure applications in underground potable water systems. The pipe is typically blue in color, signifying its suitability for drinking water.

Key Features

Material: PVC 1120 or 12454

Pressure Classes: DR18 (235 psi), DR14 (305 psi), DR25 (165 psi)

Joint Type: Gasketed bell-and-spigot with elastomeric seal

Compliance: AWWA C900, NSF 61 for potable water

Technical Specifications

Why Choose C900 Water Pipe?

1. Superior Corrosion Resistance

Unlike metal pipes, PVC is not affected by soil chemicals, corrosion, or galvanic action. This ensures long-term performance with minimal maintenance.

2. Lightweight and Easy to Install

C900 PVC pipe weighs significantly less than ductile iron or steel, making it easier to transport, handle, and install without heavy equipment.

3. High Strength-to-Weight Ratio

Despite its light weight, C900 pipe provides excellent pressure resistance and toughness, suitable for both mainlines and fire hydrant feeds.

4. Leak-Free Joints

The rubber gasket joint system provides a tight seal, even with minor ground movement or settlement, reducing the risk of leakage.

5. Longevity

C900 water pipe systems are designed to last 50 years or more, offering excellent return on investment and life-cycle performance.

Typical Applications

C900 water pipe is widely used in:

Municipal drinking water distribution

Fire protection systems

Rural and agricultural water supply

Industrial water systems

Replacement of aging ductile iron or asbestos-cement pipes

C900 vs Other Pipe Materials

Installation Tips

1. Trenching: Ensure a flat, debris-free trench bottom with suitable bedding material.

2. Joint Lubrication: Apply appropriate lubricant to the gasket and spigot before joining.

3. Pipe Alignment: Maintain proper alignment to avoid stress at the joints.

4. Pressure Testing: Conduct hydrostatic tests according to AWWA guidelines before backfilling.

If you're looking for a durable, efficient, and corrosion-resistant solution for underground water systems, C900 water pipe is one of the most reliable options on the market. Its ease of installation, long lifespan, and excellent hydraulic performance make it a top choice for engineers and utility providers around the world.

Whether you are upgrading an existing system or installing new water mains, choosing AWWA C900-compliant PVC pipe ensures your infrastructure meets modern performance and safety standards.

Common Types of C900 Fittings

Elbows: Used to change the direction of the pipeline. Standard angles include 11.25°, 22.5°, 45°, and 90°.

Tees: Used to create branch connections. These can be equal tees or reducing tees.

Reducers: Allow connection between pipes of different diameters.

Couplings: Used to join two straight pipe sections, often with bell or mechanical joint ends.

End Caps: Close off the end of a pipeline either temporarily or permanently.

Flanged Adapters: Used to connect PVC pipe to flanged equipment such as valves or hydrants.

Mechanical Joint Fittings: Use bolts and glands for secure connections and are easy to assemble or disassemble.

Common Materials and Their Uses

PVC (Injection-Molded or Fabricated): Lightweight and corrosion-resistant, ideal for standard pressure-rated fittings.

Ductile Iron: Used in high-stress applications, especially when connecting to metal valves or hydrants.

HDPE or Composite Adapters: Sometimes used in mixed systems where flexibility or chemical resistance is needed.

Common Joint Types for C900 Fittings

Gasketed Bell-End (Push-On): Uses a rubber gasket for a watertight seal, similar to standard pipe joints.

Mechanical Joint (MJ): Found mostly in ductile iron fittings, uses bolts and a compressive gland to secure the joint.

Solvent Weld: Rare in pressure systems due to limited strength.

Flanged Ends: Allow direct bolted connections to pumps, valves, hydrants, or metal pipe networks.

FAQ

Q1: What does “C900” mean in C900 water pipe?

A: “C900” refers to the AWWA (American Water Works Association) standard that governs the manufacturing of PVC pressure pipes for potable water systems. C900 pipes are typically pressure-rated and used for underground water mains.

Q2: What sizes are available for C900 PVC pipe?

A: C900 water pipes are commonly available in diameters ranging from 4 inches to 12 inches. Other sizes may be available depending on the manufacturer and project requirements.

Q3: What pressure ratings are available for C900 pipe?

A: Common pressure classes include DR25 (165 psi), DR18 (235 psi), and DR14 (305 psi), depending on wall thickness and intended use.

Q4: Can I connect C900 pipe to metal valves or hydrants?

A: Yes. You can use flanged adapters or mechanical joint fittings made of ductile iron or compatible PVC to connect C900 pipes to hydrants, valves, or metal piping systems.

Q5: What kind of fittings are used with C900 pipe?

A: Fittings include elbows, tees, couplings, reducers, caps, and adapters. These are available in both PVC and ductile iron materials and come with gasketed bell ends, mechanical joints, or flanged connections.

Q6: Is C900 pipe suitable for fire protection systems?

A: Yes. C900 pipe is often used in municipal water systems that include fire hydrants and fire suppression infrastructure, provided it meets local fire code requirements.

Q7: Does C900 pipe require thrust blocking?

A: Yes. At directional changes or fittings, concrete thrust blocks or mechanical restraints are typically required to prevent joint separation due to internal pressure.

Q8: Is C900 pipe NSF-certified for potable water?

A: Yes. Most C900 pipes are certified to NSF/ANSI 61 for drinking water applications, but it’s always recommended to confirm certifications with the supplier.

Q9: What’s the difference between C900 and C905 pipe?

A: C900 is designed for pipe sizes from 4 to 12 inches, while C905 covers larger diameter PVC pressure pipes from 14 inches and up. Both meet different AWWA standards but serve similar functions.

Q10: How long does C900 water pipe last?

A: With proper installation and usage, C900 pipes can last 50 to 100 years, offering excellent long-term performance and low maintenance.