Slow sand water filters in freezing weather

This is an update on the condition of the filters running here with respect to the below freezing weather we have had here in Western Washington state the past two months. There was nearly 3 weeks (part of December and part of January) where the temperature only got above freezing for 5 days during the daylight hours. From Dec 30 to Jan 19, the average temperature was 32 deg F.  with a low of 18 deg F.

All the filters froze solid. Pipes were pushed apart where they were not glued. Several connections that were glued were totally destroyed. So far, all of the connections that were not glued have been found to be ok. We are slowly repairing the damaged pipes that were glued. One pressure tank was destroyed. That is in the process of being repaired. All of the damage found so far, could have been prevented with proper maintenance.

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