I've been using Rain Dial sprinkler system of James Hardie Irrigation since 1996. For the last three years I've been experiencing what is called hydraulic hammer - when the last zone ends its operation, a hydraulic shock spreading over the pipes shakes my house. I had a shock absorber installed - to no avail. I tried to empty the system of water cutting off the main valve, turning on all the faucets, turning them off when water ceases running out, and turning the valve back on. It did not help e...
