Customer stated that the irrigation system was not working. It was working before new pump was installed. We had run leak diagnostic on irrigation lines before pump was installed. Verified that new pump was operating correctly. House side of system is having no issues. Irrigation line is connected to system but bypasses the water treatment. Went into crawlspace to find location of irrigation piping. All piping is Upunor plastic pex. Located irrigation supply line and found a ball valve in off position downstream of pump. Ball valve is located directly above crawlspace opening. Showed customer location of valve. They did not know it existed. Opened valve and pressurized irrigation system. Tested sprinkler zones and bled air from lines. Some of the sprinkler heads appear to be fouled with debris. Customer will need irrigation specialist to clean or replace. Waved diagnostic fee.