1. **What is SDR35 pipe used for?**
SDR35 pipe is primarily used for gravity-flow sanitary sewer systems, storm sewer drainage systems, and other non-pressure drainage applications. It is a standard dimension ratio for PVC pipe designed to handle underground burial loads for sewage and drainage.
2. **Is SDR35 pipe safe for drinking water?**
No, standard SDR35 PVC pipe is **not** certified or approved for conveying drinking water (potable water). It does not meet the required standards (like NSF/ANSI 61) for materials in contact with drinking water.
3. **What type of pipe is not recommended for a water line?**
Pipes strongly **not recommended** for potable water lines include lead pipe, galvanized steel pipe (prone to corrosion and rust), standard SDR35 PVC (not rated for pressure or drinking water), and concrete/asbestos-cement pipe (potential health concerns and obsolete).
4. **What is the best pipe for drinking water quality?**
The best pipes for maintaining high drinking water quality are copper pipe (Type K, L, or M), PEX (cross-linked polyethylene) tubing (specifically NSF/ANSI 61 certified for potable water), and CPVC (Chlorinated Polyvinyl Chloride) pipe (also NSF/ANSI 61 certified). These materials are inert, corrosion-resistant, and approved for direct contact with drinking water.
5. **Which pipe is best for sewerage?**
The best pipe for gravity-flow sewerage (sanitary sewers) is typically SDR35 PVC pipe. It is the standard choice due to its durability, corrosion resistance, smooth interior (minimizing clogs), cost-effectiveness, and design specifically for handling sewage flow under buried conditions. Vitrified Clay Pipe (VCP) is also a traditional and very durable option.
