Three Strikes Proof That A Corrosion Threat Does Not Always Produce The Appropriate Response Preface A chemical water treatment company acquires a new contract for an older New York City building property known to have not been well maintained or chemically protected.  Large rust and scale deposits are found in all strainers and have accumulated throughout the system based upon examples of pipe removed.  Thread leaks are evident at some examples of pipe. A large duplex coarse basket strainer, when opened for spring clean-out, shows it almost fully clogged with heavy rust deposits, some larger than a silver dollar.  The 14 in. condenser water system is fully drained for freeze protection every year, which helps to explain the large volume of rust deposits. Prior to entering their agreement with the building owner, the water treatment representative suggests an ultrasonic investigation of the 50 year old condenser water system in order to learn of any threats potentially impacting their planned chemical cleaning and treatment program.  Concern to a major failure occurring within the upcoming cooling season is also a major concern. Investigation…

Tirelessly Following The Wrong Direction Ignoring Hard Evidence Of A Massive Corrosion Problem Until Corrosion Wins Out Preface A relatively new luxury condominium in New York City having $10+ million valued apartments has been plagued with piping failures at its package unit based condenser water piping system since opening, and has received various conflicting recommendations toward resolving its corrosion issues.  They have already replaced all small threaded pipe nipples with dielectric fittings based upon a contractors suggestion that they have a system wide galvanic corrosion condition.  Another consultant has installed water filtration as the solution, although backwards.  Others have suggested low flow conditions as the culprit.  The condo association hires CorrView International, LLC to perform an ultrasonic investigation of the condenser water piping system, and requests our recommendations to correct the problems identified. The building has a central open condenser water system which splits into 6 sets of smaller 4 in. risers feeding individual A/C package units for the tenants.  Piping ranges from 12 in. diameter near the cooling tower and pump room to 1-1/2 in. at the A/C units.  All pipe is…