(a) To test for an obstruction in the barb or valve body, verify that there
is a flow at the valve inlet, then turn the control knob counterclockwise to open the
(b) If the valve begins to work, adjust it for the desired rate of flow.
(c) If the valve remains blocked, clamp the inlet tube, then disassemble
the valve. Carefully clean and lubricate the parts, then reassemble and test the valve.
(3) If the water stays on, refer to the instructions for the water relay valve
below. Refer to figure 5-3.
(a) If the water relay valve does not completely shut off, you may have
a defective O-ring seal on the end of the system. Disassemble the water relay valve
and inspect the O-ring, stem, and seat for defects or debris.
(b) If there are no defects or debris, check to see if the signal to the
water relay valve shuts off fully.
(c) If the test is abnormal, replace any defective parts. Reassemble
and test the valve.