Spare part Astralpool Level regulator Circular cap with ring
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Spare part Astralpool Level regulator Nozzle body
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Spare part Astralpool Buoy Level Regulator
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Refill Astralpool Circular lid (21.2 cm)
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Spare part Astralpool Level regulator Valve fixing assembly
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Questions and answers
My regulator keeps letting water in. What's wrong with it?
This is the most expensive problem you can have with a pool, and it’s almost always fixed for €5.95. Two possible causes:
- The float is flooded: it has filled with water through a crack and no longer floats. Since it doesn’t rise, it never sends the signal to shut off the water. Check it by shaking it: if it sounds like there’s liquid inside, that’s the problem. Solution: replace the float
- The valve body isn’t closing: limescale or wear on the internal seal prevents it from shutting off the flow even if the float rises. Solution: Clean off the limescale or replace the valve body (€23.95)
How to tell the difference in thirty seconds: lift the float with your hand. If water stops coming in when you lift it, the float is the problem. If water continues to come in with the float up, it’s the nozzle.
While you’re fixing it, turn off the regulator’sshut-off valve and refill the tank manually. Every day that passes means tap water is flowing directly down the drain through the overflow—along with diluted chemical treatment.
No water is coming in, and the pool level is dropping
Less problematic than the previous one, but with its own risk: if the water level drops below the skimmer inlet, the pump starts to draw in air, loses its prime, and may end up running dry.
Check the following in this order:
- The regulator’sshut-off valve: It seems obvious, but it’s surprisingly common for it to have been closed during winterization and for no one to have reopened it
- Municipal water pressure: check that there’s water coming out of the nearest faucet
- The float is stuck: leaves, dirt, or limescale in the sump can prevent it from lowering. Clean it and check that it moves freely
- The nozzle clogged with limescale: disassemble and clean it. If it doesn’t work again, replace the body
- The sump-to-pool connection: if it’s clogged, the sump won’t reflect the pool’s actual water level, and the float won’t know it needs to fill the pool
Quick test: Lower the float by hand. If water enters this way, the mechanism is working, and the problem is that the float wasn’t lowering on its own (blockage or sump level). If no water enters even when you lower it, check the water flow and the nozzle.
How do I know if the buoy is flooded?
This is the most useful test on this page, and it doesn't cost a thing:
- Shake it with your hand: if it sounds like liquid moving inside, it’s filled with water
- Compare its weight to what it should weigh: a sound buoy is practically weightless
- Hold it up to the light to check for fine cracks, especially at the seams
- Float test: submerge it in a bucket. If it doesn’t rise to the surface on its own, it’s dead
A flooded buoy can fail in two ways depending on how it settles: if it stays at the bottom, water keeps flowing in; if it gets stuck at the top, water never gets in.
At €5.95, it’s one of those parts worth keeping as a spare in the shed—especially since a malfunction directly translates to a higher water bill.
The nozzle is leaking even though the level is high
The nozzle body (€23.95) is the valve that opens and closes the flow of tap water. When it leaks with the float up, its internal seal is no longer effective.
Before replacing it, try this free fix:
- Remove the limescale: take the faucet head apart and soak it in a descaling solution or vinegar. Limescale buildup on the valve seat is the most common cause
- Check that there is no debris trapped in the seat: a leaf or a grain of sand can prevent the valve from closing just as effectively as limescale
- Check the valve height: if the mounting assembly (€6.70) has come loose, the mechanism’s geometry changes and the float no longer closes completely
If it continues to drip after cleaning, the internal seal is worn out and you’ll need a new unit. And a maintenance tip: in hard water, cleaning away the limescale every season will extend the life of this part by years.
Which lid do I need—a flat one or one with a rim?
It depends on the condition of the rim (the frame that surrounds the cover and forms the edge of the manhole against the pavement):
- 21.2 cm circular manhole cover (€9.22): if the rim is secure and in good condition, the cover alone is sufficient
- Circular cover with rim (€16.40): the complete set, for when the rim is also cracked, discolored, or loose
Measure before ordering: remove the cover and check the diameter of the opening. The standard size for this line is 21.2 cm.
And don’t put it off: a cover that creaks when you step on it is about to give way. Plastic becomes brittle after years of sun exposure, and an open manhole cover flush with the pavement is a tripping hazard—or worse. For €9.22, it’s not worth the risk.
Tip: If your skimmer has covers of the same type, also check for skimmer replacement parts —they tend to wear out at the same time.
Is it worth having a level controller?
Yes, and for more reasons than you might think:
- It protects the pump: keeping the water level at half the skimmer’s height prevents it from drawing in air, which is the number one cause of loss of prime and pumps running under excessive strain
- It stabilizes the watertreatment: sudden manual top-offs disrupt the water’s chemistry; the regulator’s continuous, small additions keep it more stable
- It saves you from having to keep an eye on it in the middle of August, which is when evaporation is at its highest
The downside is addressed on this page: you have to check it. A forgotten regulator left open means water running day and night.
Five minutes a month lifting the cover—to check that the float moves freely and that the valve closes—is all the maintenance it needs.
If you’re considering installing one, the equipment catalog is under “level regulator.”
Are these replacement parts compatible with regulators from other brands?
These are genuine Astralpool replacement parts for their level regulators. As with all pool accessories, compatibility depends on the model—and here’s a helpful tip:
- The float is the part with the most flexibility: measure yours (diameter and type of attachment to the arm) and compare it to the product listing
- The nozzle body and mounting follow the geometry of each manufacturer’s mechanism
- The cover is strictly made to measure (21.2 cm in this range) and to shape
If your regulator is from another brand, send a photo of the open valve box with the mechanism visible and another of the cover via the contact form: many parts have equivalents.
And if the mechanism is severely damaged or is from a discontinued model, it’s sometimes more cost-effective to replace the entire regulator while reusing the existing valve housing: see the level regulator catalog.
Where is the regulator installed, and at what height?
The regulator is housed in a chamber next to the tank, connected to it by a pipe that keeps both at the same level—the principle of communicating vessels.
The keys to a properly functioning system:
- The valve’s height determines the level at which the pool will stabilize. It must be positioned so that the water remains halfway up the skimmer: if it’s too low, the pump will draw in air; if it’s too high, the skimmer won’t skim the surface
- Accessible: if the valve box is buried under a planter or covered by furniture, no one will ever check it—and that’s when the surprise bills start
- With its own accessibleshut-off valve, so you can turn off the water without having to locate the main valve
- Clear flow between the valve box and the pool: if it becomes clogged, the valve box will no longer reflect the actual water level
If your level regulator fills but the water level is too high or too low, it’s not a malfunction: it’s due to the valve’s height. Check the mounting assembly (€6.70) and its adjustment.
For new installations, see the “level regulator” section of the equipment catalog; if you have any questions about installation, please contact us via the contact form.
Where can I buy replacement parts for the level regulator?
On this page, you'll find the exploded view with direct links to each part:
- Mechanism: float (€5.95), spout body (€23.95), and valve mounting assembly (€6.70)
- Cover: 21.2 cm circular cover (€9.22) or cover with rim (€16.40)
Buying tip: If you’re placing an order, be sure to add the float even if yours is working. For €5.95, having a spare in your shed will save you days of water running when it fails—and it always fails in August.
Shipping within 24–48 hours to mainland Spain for in-stock replacement parts; free shipping on orders over 150 €. Genuine Astralpool replacement parts with an official warranty (E-Partner).
Replacement parts for the pool level regulator: float, nozzle, and cap
The level regulator is the device that keeps the water level at the correct height without you having to remember to do it: when the level drops due to evaporation, a float opens a valve and water from the mains flows in until the level is restored.
When it malfunctions, it does so in one of two ways—and it’s important to distinguish between them, because one costs money every day: it either fails to fill (and the skimmer ends up sucking in air) or it won’t stop filling (and the water meter keeps running).
Here’s the complete breakdown with prices and troubleshooting for both cases. Genuine replacement parts Astralpool with the manufacturer’s official warranty—we’re an E-Partner Astralpool.
Related categories: Level regulator · Pool skimmer replacement parts · Pool basin components · Drain replacement parts · Replacement parts · Technical service
Level Control Breakdown
| Replacement part | Estimated price | What it does and when to replace it |
|---|---|---|
| Float | €5.95 | The part that detects the water level and activates the valve. Replace it if it is waterlogged (filled with water and no longer floats), cracked, or deformed. It is the number one cause of the two typical malfunctions —and the cheapest to replace. |
| Nozzle body | €23.95 | The valve body through which mains water enters. Replace if it leaks constantly, is encrusted with limescale, or does not close when the float is up. |
| Valve Mounting Assembly | €6.70 | The mounting bracket that holds the valve in place. If the valve wobbles or has lost its adjustment height, check this. |
| Circular cover with ring | €16.40 | The cover and trim ring assembly that covers the manhole. For when the trim ring is also damaged. |
| 21.2 cm circular cover | €9.22 | Just the cover, if the rim is in good condition. The economical option. |
How it works (and why it fails)
The mechanism is the same as that of a toilet tank, adapted for outdoor use:
- Water from the pool enters the regulator chamber, which is connected to the pool and maintains the same water level
- A float floats on top of that water
- When the level drops, the float drops with it and opens the valve that lets in water from the municipal supply
- As the level recovers, the float rises and closes the valve
The two potential points of failure are obvious: the float (if it becomes submerged or cracks, it stops floating and provides false readings) and the valve body (if limescale builds up or the internal seal fails, it won’t close properly).
And the reason they fail is always the same: this equipment operates outdoors, exposed to tap water laden with lime, and no one ever checks it —until the water bill arrives.
Quick Diagnosis: From Symptom to Part
| Symptom | Most Likely Cause | Part to Check |
|---|---|---|
| Water keeps coming in (water meter running high) | Flooded float that won’t rise, or a nozzle that won’t close | Float (€5.95) first; then nozzle body |
| No water is coming in and the level is dropping | Float stuck, valve clogged with limescale, or shut-off valve closed | Check the shut-off valve; clean the nozzle; check the float |
| Constant dripping from the spout | Internal seal worn out or limescale | Nozzle body |
| Fills but overflows | Valve height is misaligned | Valve mounting assembly |
| The level does not match that of the tank | Catch basin connection is clogged | Check the pipe between the manhole and the pool |
| The cover is creaking or broken | Plastic has become brittle from sun exposure | Cover (single or with ring) |
| Discolored or loose ring | Deteriorated frame | Lid and ring assembly |
Why it’s worth fixing it now
A regulator that doesn’t close properly lets tap water in 24 hours a day. If a malfunction goes unnoticed for a couple of summer months, the cost of water far exceeds the €5.95 price of a new float—and it also dilutes the pool’s chemical treatment, forcing you to constantly adjust the chlorine and pH levels.
A regulator that doesn’t fill the pool is less obvious but also costly: the water level drops below the skimmer inlet, the pump starts sucking in air, loses its prime, and, in the worst case, runs dry.
In both cases, checking takes five minutes: just lift the cover off the filter box and take a look.
Maintenance: five minutes a month
- Lift the lid once a month during the season and check that the float is moving freely and the valve closes
- Gently shake the float: if you notice water inside, it’s flooded and needs to be replaced
- Clean the lime buildup from the nozzle at the start of the season: this is what eventually prevents it from closing
- Check that the manhole doesn’t have any leaves or accumulateddebris blocking the float’s movement
- Winterization: If you’re closing the pool for the winter, consider also turning off the regulator’s shut-off valve to avoid any surprises
- Inspect the cover before it breaks: a brittle cover that gives way under a foot means a fall and an open valve box
Is your regulator not filling up, or won’t it stop filling? First of all, do the thirty-second test: lift the float by hand. If the water stops coming in, the float is the culprit (€5.95); if it keeps coming in, it’s the nozzle. And if you’re not sure or are looking for a part you don’t see here, call us at 91 128 55 90 or send us a message via the contact form with a photo of the open drain. See also: level regulators, skimmer replacement parts, pool basin supplies, and replacement parts.
