Insert your plumbing specification training video here.

• Fixture schedules typically define make, model, flow rate, and mounting height — double check ADA compliance.
• Watch for CPVC, copper, or PEX materials and jointing methods listed in piping sections.
• Backflow prevention and cleanouts are critical to compliance — locate and count them carefully.
• Drainage and vent sizing is key — look for references to code tables and slopes.
• Cross-check Division 23 and 26 for water-cooled equipment or connections.

1. What information should you verify on a fixture schedule?
   Answer: Make, model, flow rate, ADA mounting height, and any required power or water supply connections.
2. Which pipe materials are common in Division 22, and how are they joined?
   Answer: CPVC, copper, or PEX — joined using solvent welds, soldering, or crimp fittings, depending on material.
3. Why are cleanouts and backflow preventers important?
   Answer: Both are required for code compliance and must be properly located and counted during takeoff.
4. Where do you find sizing and slope requirements for drainage and vent piping?
   Answer: In code-referenced tables and technical spec sections — often summarized by fixture unit counts and pipe slope ratios.
5. Which divisions should be cross-checked when reviewing plumbing scope?
   Answer: Division 23 (HVAC) and Division 26 (Electrical) — for equipment requiring water, drains, or power.

Division 22: Plumbing Systems

🔹 Key Teaching Points

1️⃣ Fixture Schedule Verification

• Check make, model, GPM/flush rate, power needs, and ADA mounting height.
• Inconsistent fixture info across drawings/specs can result in costly corrections — double check!

2️⃣ Piping Materials & Connections

• Specs may list CPVC, copper, or PEX piping — and approved methods for joints (crimp, solder, solvent weld).
• Make sure material choice aligns with water temp, pressure, and code.

3️⃣ Backflow & Cleanouts

• Backflow prevention is required on most commercial potable lines — often missed in the estimate.
• Cleanouts should be counted from both plans and specs to ensure full compliance.

4️⃣ Drainage, Venting & Code References

• Sizing for DWV systems is often code-based — look for table references and slope notes in specs.
• Oversizing or undersizing pipes leads to costly redesigns — get this right early.

5️⃣ Division 23 & 26 Coordination

• Look for plumbing connections to HVAC (like condensate drains) and to electrical (for power to fixtures or pumps).
• Specs may show water-cooled units or specialty sinks in other divisions — cross-check thoroughly.

✅ Wrap-Up Summary

• Division 22 requires close reading of fixture schedules, pipe specs, and inter-division connections.
• Don’t overlook jointing methods, ADA compliance, or backflow/cleanout details.
• Always check Division 23 and 26 for scope overlap with HVAC or electrical needs.