Emergency shut off valves are drip irrigation valves to be installed in the area where you tap in for your drip irrigation system. It is the closest point to water source. Having these valves installed is crucial. Without them, you will have to shut off the water flow to your entire house should an irrigation breakdown occurs. Without them, you will also have to work on the mainline or irrigation valves.
The most commonly used for this purpose are gate valves. They are quite affordable though also tend to wear out quickly and then start leaking. Better recommended are ball valves, disk valves and butterfly valves. They are more reasonably pricey than gate valves since they are much more reliable and last several times longer.

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