The commonest cause of a continuous, low volume leak in a sprinkler head is a small debris particle that is holding the diaphragm of the control valve open. When the diaphragm is off, examine the seat for scratches and pits caused by debris binding against it.Click to see full answer. Furthermore, why is my sprinkler head leaking?There are two reasons why a sprinkler will leak water when the system is supposed to be off. The most common reason is called “Low Head Drainage”. “Low Head Drainage” occurs when the lowest head on a zone allows water to drain from the lateral piping, out of the sprinkler.Secondly, how long do Hunter sprinkler heads last? In the late mid to late 90’s, Hunter PGPs were the cream of the crop for residential rotors. They have become a weak product the last 5-7 years. Yet they are still very proud of the rotor as it has always been selling at a higher price than the other comparable Rainbird, Toro, Irritrol heads. Accordingly, what causes a sprinkler valve to stay open? Air Trapped in the Valve: A small bubble of air becomes trapped in the tiny water ports of the valve, this stops the water from flowing through the port. Since the water flowing through the port is what holds the valve diaphragm closed, the valve stays open.How do you know if your sprinkler valve is bad? Problems with an irrigation system typically make themselves evident with several common symptoms: Individual sprinkler heads not working. Low water pressure at the sprinkler heads. Sprinkler zones do not turn on. Leaking around a zone valve. Leak at the sprinkler head furthest from the valve.
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