If you’ve got an in-floor cleaning system and you’ve noticed some of the pop-up heads aren’t rising anymore — or whole sections of your pool floor are staying dirty — the culprit is usually the valve module that drives the system. Here’s how in-floor cleaning works, why heads stop popping up, and what fixes it.
How an in-floor cleaning system works
In-floor systems clean your pool through a series of pop-up heads set into the floor and walls. Instead of running them all at once, a central valve module (sometimes called a water valve or gear module) feeds water to one zone of heads at a time. Those heads pop up, blast water across the floor to push debris toward the main drain, then drop back down — and the module rotates to send water to the next zone.
That constant rotation is the key. Every head should get its turn as the module cycles through the zones. When the module stops sequencing properly, that’s when problems show up.
Why some heads don’t pop up
If some heads never rise, or some areas of the floor stay dirty while others are clean, the most common cause is a worn valve module. Inside the module, gears and seals direct the water from zone to zone. Over years of constant operation these wear out, and when they do:
- The module stops rotating through all the zones properly
- Some zones never get their turn, so those heads don’t pop up
- Water pressure gets misdirected, so even firing heads may be weak
- Debris builds up in the zones that aren’t being cleaned
A few other things can cause a single head to stop popping up — a stuck or jammed individual head, or debris lodged under it. But when it’s multiple heads or whole zones, the module is almost always the issue.
How to tell it’s the module
- Whole zones stay down while others work — points to the module not sequencing to those zones.
- The same areas are always dirty — those zones aren’t getting their cleaning cycle.
- Heads used to work and gradually stopped — typical of a module wearing out over time.
- Weak pop-up across the board — can indicate the module isn’t directing pressure properly.
The fix: replacing the module
When the valve module is worn, the fix is to replace it. The module is a serviceable part — it’s designed to be swapped out without digging up your pool floor. Once a fresh module is fitted, the system sequences through all the zones again and every head gets its turn, so your whole floor gets cleaned the way it should.
It’s worth getting it sorted promptly, because the zones that aren’t firing aren’t being cleaned at all — so dirt and debris just accumulate there, and the rest of your system works harder to compensate.
Heads not popping up?
If your in-floor cleaning heads aren’t all popping up, we can check whether it’s the valve module, a jammed head, or something else — and fit a replacement module if that’s what it needs. We service in-floor cleaning systems across Cardinia and Baw Baw Shire. Call 1300 306 285.
Frequently asked questions
Why aren’t all my in-floor cleaning heads popping up?
When multiple heads or whole zones stop popping up, the usual cause is a worn valve module. The module rotates water between zones, and as its internal gears and seals wear out it stops sequencing properly, so some zones never get their turn. Replacing the module typically restores full operation.
What does the valve module in an in-floor system do?
The valve module directs water to one zone of pop-up heads at a time, then rotates to the next zone. This cycling is what lets the system clean the whole floor using normal pump pressure, rather than running every head at once.
Can a worn module be repaired or does it need replacing?
The module is designed as a replaceable part. When the internal components wear out, it’s swapped for a new module — which can be done without digging up the pool floor. This restores proper zone sequencing.
Only one head won’t pop up — is that the module too?
Not necessarily. A single head that won’t rise can be jammed or have debris caught under it, which is a different fix to a module problem. When it’s multiple heads or whole zones, the module is the more likely cause.
How long does an in-floor cleaning module last?
It varies with how much the system runs and water conditions, but modules wear gradually over years of use. If heads that previously worked have slowly stopped popping up, a worn module is a likely reason.