Boiler loop system

Abstract

A boiler loop system including a primary-secondary piping loop interface apparatus having unitary construction including a flow diversion device, and a drain valve and a drain port in branches from a circumferential sidewall. In an embodiment, supply branch piping and return branch piping connect the primary-secondary piping loop interface apparatus to a boiler and provide attachment points for auxiliary plumbing equipment. In an embodiment, the boiler loop is integrated into the primary loop.

What is claimed is: 
     
         1 . A primary-secondary piping system, comprising:
 a primary piping loop;   a near boiler piping loop;   a secondary piping loop;   a primary-near boiler piping loop interface apparatus comprising:
 a first tubular fluid conduit having a first circumferential sidewall having a first end and a second end, 
 first and second neck portions extending substantially perpendicular from the circumferential sidewall and being substantially parallel to each other, wherein each neck portion comprises a drain valve portion extending from the neck portion, including a drain shut-off valve and a drain port, and 
 first and second flow diversion devices disposed in the first and second neck portions, respectively, wherein each flow diversion device forms a first flow path between the tubular fluid conduit and the neck in a first position and a second flow path between the drain valve portion and the neck in a second position; and 
   a primary-secondary piping loop interface apparatus comprising:
 a second tubular fluid conduit having a second circumferential sidewall having a first end and a second end, 
 first and second neck portions extending substantially perpendicular from the second circumferential sidewall and being substantially parallel to each other, wherein each neck portion comprises a drain valve portion extending from the neck portion, including a drain shut-off valve and a drain port, and 
 first and second flow diversion devices disposed in the first and second neck portions, respectively, wherein each flow diversion device forms a first flow path between the second tubular fluid conduit and the neck in a first position and a second flow path between the drain valve portion and the neck in a second position. 
   
     
     
         2 . The primary-secondary piping system of  claim 1 , further comprising a boiler operatively connected to the near boiler piping loop. 
     
     
         3 . The primary-secondary piping system of  claim 2 , further comprising a near boiler piping loop circulation pump. 
     
     
         4 . The primary-secondary piping system of  claim 3 , wherein the near boiler piping loop circulation pump is incorporated internally within the boiler. 
     
     
         5 . The primary-secondary piping system of  claim 3 , wherein the near boiler piping loop circulation pump is external to the boiler. 
     
     
         6 . The primary-secondary piping system of  claim 5 , wherein the first or second neck portion of the primary-near boiler piping loop interface apparatus comprises a flange to interface with the near boiler piping loop circulation pump. 
     
     
         7 . The primary-secondary piping system of  claim 6 , wherein the flange is rotatable. 
     
     
         8 . The primary-secondary piping system of  claim 1 , further comprising a secondary piping loop circulation pump. 
     
     
         9 . The primary-secondary piping system of  claim 8 , wherein the first or second neck portion of the primary-secondary piping loop interface apparatus comprises a flange to interface with the secondary piping loop circulation pump. 
     
     
         10 . The primary-secondary piping system of  claim 9 , wherein the flange is rotatable. 
     
     
         11 . The primary-secondary piping system of  claim 1 , further comprising a primary loop circulation pump operatively connected to the primary piping loop. 
     
     
         12 . The primary-secondary piping system of  claim 1 , further comprising a plurality of secondary piping loops comprising a plurality of primary-secondary piping loop interface apparatus. 
     
     
         13 . The primary secondary piping system of  claim 12 , wherein each of the plurality of secondary piping loops constituting a separate heating zone. 
     
     
         14 . The primary-secondary piping system of  claim 12 , wherein each of the plurality of secondary piping loops comprises a secondary piping loop circulation pump. 
     
     
         15 . The primary-secondary piping system of  claim 1 , wherein the primary-near boiler piping loop interface apparatus and the primary-secondary piping loop interface apparatus are each constructed as a single unit. 
     
     
         16 . A primary-secondary piping system, comprising:
 a primary piping loop;   a secondary piping loop; and   a primary-secondary piping loop interface apparatus comprising:
 a tubular fluid conduit having a circumferential sidewall having a first end and a second end, 
 first and second neck portions extending substantially perpendicular from the circumferential sidewall and being substantially parallel to each other, wherein each neck portion comprises a drain valve portion extending from the neck portion, including a drain shut-off valve and a drain port, and 
 first and second flow diversion devices disposed in the first and second neck portions, respectively, wherein each flow diversion device forms a first flow path between the tubular fluid conduit and the neck in a first position and a second flow path between the drain valve portion and the neck in a second position. 
   
     
     
         17 . The primary-secondary piping system of  claim 16 , further comprising a boiler operatively connected to the primary piping loop. 
     
     
         18 . The primary-secondary piping system of  claim 17 , further comprising a primary piping loop circulation pump. 
     
     
         19 . The primary-secondary piping system of  claim 18 , wherein the primary piping loop circulation pump is incorporated internally within the boiler. 
     
     
         20 . The primary-secondary piping system of  claim 18 , wherein the primary piping loop circulation pump is external to the boiler. 
     
     
         21 . The primary-secondary piping system of  claim 16 , further comprising a secondary piping loop circulation pump. 
     
     
         22 . The primary-secondary piping system of  claim 21 , wherein the first or second neck portion of the primary-secondary piping loop interface apparatus comprises a flange to interface with the secondary piping loop circulation pump. 
     
     
         23 . The primary-secondary piping system of  claim 22 , wherein the flange is rotatable. 
     
     
         24 . The primary-secondary piping system of  claim 16 , further comprising a plurality of secondary piping loops comprising a plurality of primary-secondary piping loop interface apparatus. 
     
     
         25 . The primary secondary piping system of  claim 24 , wherein each of the plurality of secondary piping loops constituting a separate heating zone. 
     
     
         26 . The primary-secondary piping system of  claim 24 , wherein each of the plurality of secondary piping loops comprises a secondary piping loop circulation pump. 
     
     
         27 . The primary-secondary piping system of  claim 16 , wherein the primary-secondary piping loop interface apparatus is constructed as a single unit.