18-28-1206.1.1 Prohibited tee applications.

   Fluid in the supply side of a hydronic system shall not enter a tee fitting through the branch opening.

18-28-1206.2 System drain down.

   Hydronic piping systems shall be designed and installed to permit the system to be drained. Where the system drains to the plumbing drainage system, the installation shall conform to the requirements of the plumbing code.

18-28-1206.3 Protection of potable water.

   The potable water system shall be protected from backflow in accordance with the plumbing code.

18-28-1206.4 Pipe penetrations.

   Openings for pipe penetrations in walls, floors or ceilings shall be larger than the penetrating pipe. Openings through concrete or masonry building elements shall be sleeved. The annular space surrounding pipe penetrations shall be protected in accordance with the building code.

18-28-1206.5 Clearance to combustibles.

   A pipe in a hydronic piping system in which the exterior temperature exceeds 250°F (121°C) shall have a minimum clearance of 1 inch (25.4 mm) to combustible materials.