Choosing the Right Casing Spacers for Municipal Infrastructure
Casing spacers are components used to center and support a carrier pipe inside a casing pipe. They play a key role in preventing pipe damage, ensuring proper alignment, and protecting against corrosion and electrical shorts. In municipal systems, where long-term performance and safety are critical, choosing the right spacer can make a major difference.
APS Casing Spacers, available from Pro-Line Fittings, are engineered for reliable performance and ease of installation across a wide range of municipal applications, including water, sewer, and gas systems.
What Casing Spacers Do
Casing spacers are used to:
- Center a carrier pipe inside a casing
- Isolate the pipe electrically to prevent corrosion
- Eliminate the need for grout, sand, or wood skids
- Prevent pipe coating damage during installation
- Maintain proper grade in gravity sewer systems
Why Municipalities Choose APS
APS Casing Spacers are designed to meet the needs of field crews and engineers working in municipal infrastructure.
- Easy to install with no grease, grout, or special tools
- Can be installed by one person
- Built with dielectric materials to prevent corrosion and shorts
- Available in multiple configurations including centered, restrained, and clear bell
- Field-adjustable risers for gravity sewer grade corrections
- Tested to withstand loads far beyond standard requirements
Available Materials and Models
APS offers three main casing spacer types:
- Polyethylene (Model CI) – Lightweight and economical
- Carbon Steel (Model SI) – With a thermoplastic powder coating
- Stainless Steel (Model SSI) – For heavy-duty and large-diameter systems
Each model is available in a range of sizes and configurations to fit specific project requirements.
Adjustable Spacers for Sewer Projects
APS field-adjustable risers and runners are ideal for gravity sewer lines. They can be changed on-site in half-inch increments, reducing inventory and allowing for fast adjustments. Independent testing shows these components exceed design loads by up to twelve times, making them a strong option for critical installations.
Casing Spacers with Rollers
For applications where the carrier pipe needs to be pushed or pulled through the casing, APS offers casing spacers with rollers. These are especially useful for longer runs or when handling larger-diameter pipe, as the rollers reduce friction during installation and help protect the pipe’s coating.
Advantages of using casing spacers with rollers include:
- Reduced drag when installing the carrier pipe
- Less risk of coating damage during insertion
- Easier handling for long or heavy pipe sections
- Compatible with standard APS spacer bands and configurations
Roller-equipped spacers provide the same corrosion protection, dielectric insulation, and secure fit as other APS casing spacers, while making installation smoother and more efficient.
Casing Spacer Clusters
APS also offers stainless steel band casing spacers in cluster configurations for projects that require multiple carrier lines within a single casing. Cluster spacers can be designed for water, sewer, conduits, or cable runs, and have been manufactured to accommodate up to 24 carrier pipes in one casing.
These spacers ensure each carrier is securely positioned and electrically isolated, while maintaining the corrosion resistance and durability found in all APS products. Cluster spacers are a practical choice for projects that need to maximize space efficiency and maintain precise alignment across multiple lines.
Casing spacers may not be visible once installed, but their role in protecting pipelines is essential. For municipalities looking to build durable, efficient systems, APS Casing Spacers provide a proven, field-tested solution.
Product Information: https://pro-linefittings.com/products/casing-spacers/
Download the brochure: https://pro-linefittings.com/wp-content/uploads/2025/08/Casing-Spacers-Brochure-REV-042425.pdf