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Corrosion of rads or scale build up symptoms.  
  1. The bottom middle area of radiators remaining cold. (Partially blocked by sludge)
  2. The need for frequent venting of radiators.
  3. Failure of circulating pump to start readily.
  4. Corrosion and oxide deposits present in failed circulating pump
  5. Water pitching from the vent pipe into the expansion tank when the system is in use.
  6. Excessive kettling or boiler noise.
  7. Cracked boiler section and leakage.
  8. Internal sludge may temporarily block perforations as shown here on the right. This old  radiator will certainly leak if sludge is removed. All radiators were replaced and the boiler heat exchanger was separately cleaned.

Radiator leakage may be hidden from view.

A pitching vent causes condensation damage to timbers and ceilings.
Pitching heating vent pipe.

Found during plumbing corrosion surveys.

water damage is on-going.

Do not disturb plumbing pipe-work without checking

 

Open Systems

A pitching open vent will cause corrosion which generates sludge.
Some cases are due to most of the radiators in the house being turned off without pump performance or primary circulation being adjusted
This can result in water pitching from an inadequate open vent into the feed / expansion tank and gaining oxygen in the process.

Often found in a larger house where only one or two rooms are now being heated.

Water damage is a traumatic event for the elderly. Carers should ask a competent plumber to ensure that all risks are addressed.

Found during a general corrosion check.

Water damage disaster is imminent.
Corroding steel nipple in a cylinder feed.


 
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