SCOTTAY2000
New Member
I'm getting spikes in water pressure, measured at the main feed to the house, starting yesterday when the outdoor sprinkler was shut and winterized.
Similar spikes happened last winter, but I didn't see the link until now.
The pressure increases a few times per day (see chart above) and then resets when a toilet or other appliance runs, causing pipes to rattle.
I have a backflow preventer that is tested annually. I also have water hammer arrestors inside the house which may help, but they do not fully solve the rattling which to me is the symptom, and the increased pressure is the problem.
I can't understand why shutting the sprinkler would affect pressure in the house. Thanks in advance for all ideas!
