Irritrol (Richdel) 205 Series Solenoid Valves

A solenoid valve is the automatic tap that controls that flow of water to an irrigation zone. Solenoid Valves are automatically operated by an irrigation controller which is programmed to tell the solenoid valve when to open & close.

The number of solenoid valves you use depends on the size of your garden & the flow output of your water supply. The number of litres per minute that are available will determine the number of sprinklers or drippers you can operate at any one time. Once your garden is divided up into each section using that information, you’ll need one solenoid valve to operate each one individually.

A master valve is installed upstream of the solenoid valves being used to control each irrigation zone. They’re not mandatory, but they are a good idea as installing one increases the life-span of each valve by protect the valves downstream from the constant pressure that would otherwise be applied. The way it works is, every time a zone is programmed to come on the master valve also switches on, providing the flow, but when all the zones are off, the master valve closes, holding back the flow & pressure of the water supply. Simply, it’s kind of like an irrigation insurance policy.

Being exposed to the weather, water damage will occur any where water can get in. Electrical tape isn’t quite water tight & over time water will creep into the circuit & create havoc & void all warranties. For this reason you should always use waterproof cable joins like heat shrinks.

Nearly all of the time, a solenoid valve staying open is caused by debris caught in the diaphragm. Even the finest debris can cause the valve not to seal shut, causing a constant leak. Other cause can be: Not enough flow because the irrigation zone is too small or, not enough pressure, the valve needs the pressure to seal shut.

Unless your tank located is upwards of 20m above your valves, gravity feed will not provide enough pressure for your valves to reliably open & close. It is not recommended.

Yes. Many homeowners successfully install their own irrigation valves. With the right tools, resources and a bit of DIY spirit, it’s a manageable project. SunshowerOnline provides detailed product information, helpful guides and expert advice to support your DIY installation.

However, if you prefer professional assistance, we also offer design services and can connect you with qualified installers. Moreover, our Instant Quote system can help you determine the scope of your project and decide if DIY installation is the right choice for you.

Regularly inspect valves for leaks, debris and signs of wear and tear. Flush your system periodically to remove any buildup that could clog valves or sprinklers. In colder climates, winterise your system to prevent freeze damage. For solenoid irrigation valves, check the diaphragm and solenoid for proper operation. Proper maintenance ensures your irrigation valves and fittings function efficiently and last longer. Consult an expert right away if you identify any issues.

The lifespan of an irrigation valve can vary depending on several factors, including the valve quality, water quality and system maintenance. Generally, a well-maintained valve made from durable materials can last 10–15 years or more. However, factors like hard water with mineral buildup or frequent pressure fluctuations can shorten their lifespan.

To choose the right irrigation system, consider the size and layout of your garden or lawn, the types of plants you’re watering and your water source. Spray systems are ideal for most applications like lawns and gardens, while drip irrigation works well for mulched garden beds and areas exposed to wind and evaporation. For expert advice tailored to your needs, request a quote from us.

To set up an irrigation system, start by planning the layout, then install the mainline pipes, valves and fittings. Attach the sprinklers, drip emitters or other irrigation devices, and connect the system to a controller. Finally, test and adjust the system to check for proper coverage and efficiency. For a more precise and tailored setup, visit our Design Department. Our experts can design and quote a customised irrigation system that perfectly fits your landscape.