Recommendation 1 — use when – Crown Boiler 24-07 User Manual
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Recommendation 1 — Use when:
• system return water is not less than 135° F for prolonged periods of time
• system flow does not impact flow through the boiler
Figure 31: Series 24 Minimum Piping Recommendation 1 - Water Boiler
NOTES:
1. All piping is schedule 40.
2. Pipe sizes listed are based on a 20°F or 40°F differential (temperature drop).
Select one to match application.
3. When specified return piping size is less than 3”, install 3” X 12” nipple and appropriate
size bell reducer directly into boiler return tapping as shown.
4. Drain valve — ball valve preferable, gate valve acceptable alternative
(supplied by others).
- Minimum valve size per ASME code is 3/4” NPT.
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Pipe Sizing and Notes