Assertion: sprinkler's pressure | /r/CapableOf | raise crooked sprinkler heads
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text: The exact procedures may vary depending on the system, but a sprinkler activation and tune-up can include: slowly recharging the water in the pipes to avoid damage from water surge; inspecting and cleaning the backflow preventer; pressure testing the main line to detect leaks; inspecting each zone to ensure it is functioning properly; straightening and raising any crooked sprinkler heads; testing the system for potential electrical problems; visually checking the pressure in each zone; cleaning spray nozzles; setting the basic watering schedule for the coming season; replacing any cracked, chipped or worn components; and checking and adjusting sprinkler coverage.