Is Your Backwash Valve Moving Slowly, or Not Fully Transitioning?

One of the most common culprits may be something small: the Y-strainer screen.

The Y-strainer filters a portion of the incoming source water and provides the clean hydraulic flow and pressure needed to operate the backwash valve.

Here’s how it works:

➡️ Source water enters through the inlet manifold

➡️ The Y-strainer screens the water

➡️ Clean water is sent to the solenoid valves

➡️ When energized, the solenoid directs water to the backwash valve diaphragm

➡️ Hydraulic pressure moves the valve from filtration to backwash & back again

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But what happens when the Y-strainer screen is dirty or damaged?

Restricted water flow can limit hydraulic pressure and prevent the valve from operating properly.

You may notice:

• Backwash valves transitioning slowly

• Valves not fully opening or closing

• Valves getting stuck in one position

• Inconsistent valve operation from cycle to cycle

The fix may be simple:

Inspect the Y-strainer screen regularly. Clean it when necessary and replace it if it’s damaged.

A small screen can have a big impact on the performance and reliability of your entire filtration system.

💡 Pro tip: If your backwash valve is moving slowly or not making a complete transition, check the Y-strainer before assuming you have a larger hydraulic or valve problem.