HOA完全没有沟通的意思。 下面是从HOA的Rules and Regulations拷贝下来的：

1.01
The term “common elements” is defined in the Illinois Condominium Property Act as all
portions of the property (except the units) including the limited common elements. For
purpose of clarity, it should be understood that the following areas are considered to be
part of the common elements:
a) Halls, stairways, hall and laundry room windows and fire equipment
b) Building roofs
c) Driveways and parking lots
d) Lawn and landscaped areas
e) Exterior elevations of the buildings
f) Cable wiring and coverings, electrical wiring, water and sewer pipes between the
walls
and common element smoke detectors
g) Balconies and patios (limited common elements)
h) Laundry rooms and laundry equipment

其中的f)说的很清楚，墙之间的管线都属于common elements。 那段腐蚀的管子在我的楼层下面，墙中间，所以我认为是common elements。