There are various traditional methods available
to treat the problems of corrosion but in any given case
each situation must be explored separately.
The cause and effect of the corrosion must be identified.
Items like water chemistry vary from one geographic region
or from one water source to the next. The design of piping
systems varies from building to building. Water velocity,
water temperature and even the metallurgy of the piping
system need to be identified.
Some of the more traditional methods of repair focus on:
chemical flushing of the system
spot repairing and replacement
redesign the hot water recirculating system to keep water
velocities below 4 ft/sec for temperatures up to 140 oF,
for water temperatures over 140oF flow maximums are recommended
to not exceed 3 ft/sec
avoid abrupt changes in piping direction
de-burr all tube ends before joining
ensure all proper soldering joints
ensure no dissimilar metal are in use or at least they are
spot repair using gear clamps or other temporary device
use a water treatment system to adjust the water quality
repipe the building in whole or in part
install some form of system to stop galvanic corrosion from
In almost every case using one or a combination of some
of the traditional methods of repair involved tearing out
walls and pipes and in the case of chemical flushing, chemical
agents are used.
Traditional methods of repair were also found to be expensive
owing to the amount of associated “civil work“
i.e.: wall, tile and ceiling repair that is needed after
accessing pipes behind walls and ceilings.
In revenue generating properties, such as Hotels, rooms
not available for use create a direct revenue loss.