---
title: Hydronic Piping
…575 unchanged lines
options:
- "ASME B16.9, ASTM A234 WPB"
− - "Per drawings — special fitting or fabricated fitting as indicated"
+drawing_ref: true
default: "ASME B16.9, ASTM A234 WPB"
```
…334 unchanged lines
options:
- "3/4 in. through 1 in. — 7 ft; 1-1/4 in. through 1-1/2 in. — 9 ft; 2 in. — 10 ft; 2-1/2 in. through 3 in. — 12 ft; 4 in. — 14 ft; 6 in. — 17 ft; 8 in. — 19 ft; 10 in. — 22 ft; 12 in. — 23 ft"
− - "Per structural drawings where reduced spacing is required to suit building bay"
drawing_ref: true
default: "3/4 in. through 1 in. — 7 ft; 1-1/4 in. through 1-1/2 in. — 9 ft; 2 in. — 10 ft; 2-1/2 in. through 3 in. — 12 ft; 4 in. — 14 ft; 6 in. — 17 ft; 8 in. — 19 ft; 10 in. — 22 ft; 12 in. — 23 ft"
…14 unchanged lines
options:
- "1/2 in. through 1 in. — 5 ft; 1-1/4 in. through 2 in. — 6 ft; 2-1/2 in. through 3 in. — 8 ft; 4 in. — 10 ft"
− - "Per structural drawings where reduced spacing is required"
drawing_ref: true
default: "1/2 in. through 1 in. — 5 ft; 1-1/4 in. through 2 in. — 6 ft; 2-1/2 in. through 3 in. — 8 ft; 4 in. — 10 ft"
…331 unchanged lines
options:
- "ASME A13.1 — yellow label with black text (dangerous contents)"
− - "Owner standard — as indicated on drawings"
- "Green label with white text (per ANSI/ASME A13.1 optional scheme)"
+drawing_ref: true
default: "ASME A13.1 — yellow label with black text (dangerous contents)"
```
…5 unchanged lines
- "ASME A13.1 — green label with white text (safe/low hazard)"
- "Blue label (common industry practice for CHW)"
− - "Owner standard — as indicated on drawings"
+drawing_ref: true
default: "ASME A13.1 — green label with white text (safe/low hazard)"
```
…25 unchanged lines
- "Full-bore bypass valves across each terminal unit coil (required)"
- "Modular flushing cart with temporary connections at equipment headers"
− - "Per flushing plan approved by Engineer of Record"
+drawing_ref: "flushing plan"
default: "Full-bore bypass valves across each terminal unit coil (required)"
```
…274 unchanged lines
### Every CHW fitting, flange, and valve shall be insulated with fitting covers or mitered sections sealed with manufacturer's vapor-retarder adhesive before final inspection, because chilled water insulation vapor retarder breaches at supports, valve bodies, and fitting insulation seams cause condensation drips on ceilings and floors.