Quote:
Originally Posted by k2at
An easier way to replace a defective sprinkler is to just buy a new one, turn the top of the new one to pull out the guts of the system and do the same to the old sprinkler in the ground. Take new guts and put it in the old housing in the lawn. This method allows one to change the workings, while not screwing out the entire sprinkler. No digging involved. Takes about 60 seconds to change a head.
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This is definitely the way to do it if the old housing is not damaged and it seldom is.
Sprinkler heads do not last forever. The seals deteriorate. Lawn mowers hit them. Edgers tear them up, etc. I also think there is some little demon that prowls around at night messing up the adjustments.