CSLB C-27 Landscaping ContractorIrrigation SystemsMedium
A landscape contractor is tasked with repairing a broken PVC lateral line in an existing irrigation system. The break is located in a high-traffic area of a public park. After excavating and cutting out the damaged section, which repair method is generally considered the most durable and reliable for long-term performance in such an environment?
- AUsing a slip-fix repair coupling with solvent cement.
- BApplying a rubber patch secured with hose clamps.
- CJoining with a compression coupling (clamp-style).
- DWrapping the break with waterproof tape and applying epoxy.
Show answer & explanationAnswer & explanation
Correct answer: A. Using a slip-fix repair coupling with solvent cement.
A slip-fix repair coupling (also known as a telescoping or expansion coupling) joined with proper PVC solvent cement creates a strong, permanent, and watertight bond that matches the integrity of the original pipe. It is designed for situations where a section of pipe needs to be removed and replaced, making it ideal for durable repairs in high-traffic areas.
Why the other options are wrong
- B. A rubber patch with hose clamps is a very temporary and unreliable repair for a pressurized irrigation line, prone to failure.
- C. Compression couplings are often used for quick, temporary repairs or in non-pressurized drainage; they can slip or leak under pressure over time, especially with ground movement.
- D. Tape and epoxy are typically temporary fixes and are not reliable for pressurized irrigation systems, especially in high-traffic areas.
PVC Lateral Line Repair
Methods used to fix breaks or leaks in PVC irrigation pipes, focusing on durability and structural integrity.
- Proper preparation (cleaning, deburring) is crucial for a strong bond.
- Solvent cement creates a chemical weld for PVC.
- Slip-fix couplings allow for replacement of a pipe section without extensive trenching.
Memory trick: Slip-fix and cement, a permanent bond, nothing to lament.