AQUAvalve Silicone – Top Silicon

The AQUAvalve Silicone – Top Silicon is an OEM replacement silicone seal for the AQUAvalve5 Top Float. It fits into the recess on the top float of the AQUAvalve5, forming the watertight seal that controls gravity-fed nutrient delivery to your AutoPot tray. Produced in bright colors for quick visual identification, this is the smaller of the two AQUAvalve5 silicone pieces — sized specifically for the Top Float, not interchangeable with the Bottom Float silicone.

AQUAvalve Silicone – Top Silicon Specifications

Key specifications for the AQUAvalve5 Top Float replacement silicone. This is a float-position-specific part — confirm you need the Top Float variant before ordering.

Specification	Value
Brand	Auto Pot
Compatible Valve	AQUAvalve5
Float Position	Top Float (smaller piece)
Material	Silicone
Color	Bright color (may vary from images)
Weight	0.50 lb (shipping weight)
Valve Generation	AQUAvalve5 only (not compatible with AQUAvalve4 or earlier)

Why Choose AQUAvalve Silicone – Top Silicon

The AQUAvalve5 depends on two precisely sized silicone seals — one for each float — to maintain consistent water delivery. Over time, silicone can degrade, deform, or become dislodged, causing the valve to stick open or fail to seal. Rather than replacing the entire valve assembly, this replacement silicone allows you to restore normal operation at minimal cost.

• Float-position specific fit: Auto Pot produces the Top Float silicone and Bottom Float silicone as separate parts because they are different sizes. The Top Float silicone is the smaller of the two. Using the wrong silicone will result in a poor seal and valve malfunction, so confirming the correct variant before ordering matters.
• OEM replacement for AQUAvalve5: This silicone is manufactured to fit the recesses in the AQUAvalve5 top float. It is not a generic seal — it is the part Auto Pot supplies as a replacement for their own valves.
• Bright color for visibility: The silicone is produced in a bright color, which makes it easy to locate inside the valve body during maintenance. Exact color may vary between production batches, but the fit and function remain consistent.
• Preserves valve function without full replacement: If your AQUAvalve5 is leaking or not sealing correctly and the float mechanism is otherwise intact, replacing the silicone seal is the first maintenance step to try before purchasing a new valve.
• Low cost, high impact: At under a dollar, this part lets you extend the working life of an AQUAvalve5 that is mechanically sound but has a worn or displaced silicone seal.

Growers running multiple AutoPot trays should keep a supply of both Top and Bottom Float silicones on hand. Silicone wear is gradual and often goes unnoticed until a tray runs dry or floods — having spares available prevents unplanned downtime during a grow cycle.

Best Uses for AQUAvalve Silicone – Top Silicon

This part applies to one specific maintenance task, but that task comes up regularly in any operation running AQUAvalve5-equipped systems.

• Routine maintenance on AQUAvalve5 valves: AutoPot recommends periodic inspection of valve components. Swapping out aged or visibly deformed silicone seals during a scheduled maintenance window keeps valves operating reliably between grow cycles.
• Diagnosing valve leaks or dry trays: When an AQUAvalve5 tray either runs dry unexpectedly or floods past the normal water line, the silicone seals are among the first components to inspect. A degraded top float silicone can prevent the float from seating properly.
• Restoring a valve after physical damage: If a valve has been disassembled for cleaning or was accidentally dropped and the top float silicone was lost or damaged, this replacement part gets the valve back in service without needing a full valve replacement.
• Building a spare parts kit for AutoPot installations: Commercial growers and hobbyists running large AutoPot setups benefit from stocking replacement silicones for both float positions. This eliminates the need to halt a grow while waiting for parts to ship.
• Post-season system rebuilds: Between crop cycles, cleaning and rebuilding AQUAvalve5 units with fresh silicone seals ensures the next grow starts with components in known-good condition.

AQUAvalve Silicone – Top Silicon vs Bottom Float Silicone

Auto Pot offers two distinct silicone replacement parts for the AQUAvalve5: the Top Float Silicone and the Bottom Float Silicone. These are not interchangeable. The top float silicone is the smaller piece; the bottom float silicone is larger. Both fit into recesses in their respective floats and serve as the sealing element that controls water flow through the valve.

When ordering, the key distinction is which float inside your AQUAvalve5 needs the new silicone. Open the valve body and examine both floats. The top float is the upper float mechanism — its silicone is this product. The bottom float is the lower mechanism and uses a larger silicone piece sold separately. If you are replacing silicone on a valve after a full disassembly, it is common practice to replace both pieces at the same time.

For AQUAvalve4 and earlier valve models, neither the Top nor Bottom Float Silicone for the AQUAvalve5 applies. Auto Pot supplies a separate silicone replacement for AQUAvalve4 and older models. Check the generation of your valve body before ordering any silicone replacement to avoid receiving a part that does not fit.

Compatibility

The AQUAvalve Silicone – Top Silicon is compatible with a single product line:

• AQUAvalve5 Top Float only. This silicone fits the recess in the top float of the AQUAvalve5. It is not compatible with the AQUAvalve5 Bottom Float, nor with AQUAvalve4 or any earlier generation of the valve.

The AQUAvalve5 is the current-generation AutoPot gravity valve used across the full range of AutoPot trays and systems, including the 1Pot, XL, and XXL modules. If your AutoPot system was purchased in recent years, it almost certainly uses the AQUAvalve5. If you are unsure of the valve generation, examine the valve body for a version marking or compare its profile to the product images on the Auto Pot website.

This part does not require any tools for installation — the silicone seats by hand into the float recess. No adhesives or sealants are needed. If your AutoPot system also uses air pumps for oxygenating the reservoir, valve maintenance and pump maintenance are typically performed on the same schedule to keep the entire water delivery system in good working order.

For growers who monitor water quality closely, pairing valve maintenance with regular EC checks using a dedicated meter helps catch delivery issues early. If you measure EC at the tray and see unexpected drift, inspect the AQUAvalve5 components — including the float silicones — alongside your EC meter’s electrode to rule out both delivery and measurement issues.

Usage Guidelines

The AQUAvalve silicone seats into a recess on the float — it does not thread, clamp, or bond. The following guidelines cover inspection, replacement timing, and handling.

• Inspect valve silicones at least once per grow cycle. Remove the AQUAvalve5 from the tray, open the valve body, and visually inspect both float silicones. Look for surface cracking, permanent deformation, or displacement from the recess. A silicone that has deformed will not create a consistent seal.
• Replace immediately if the valve is leaking or failing to open. A valve that holds water past the normal tray fill line, or one that fails to deliver water to a tray at all, often has a compromised silicone seal. Replace the appropriate silicone (top or bottom float) before reinstalling the valve.
• Do not use petroleum-based lubricants on the silicone. If you need to ease the silicone into the recess, use clean water only. Petroleum-based products degrade silicone over time and can contaminate the nutrient solution.
• Handle with clean, dry hands. Oils and debris on the silicone can prevent it from seating properly in the float recess. Inspect the recess itself for buildup or debris before inserting the new silicone.
• Replace both silicones at the same time for a complete rebuild. If the top float silicone is showing significant wear, the bottom float silicone is likely at a similar stage. Replacing both during the same maintenance session avoids needing to re-open the valve shortly after.

How to Install the AQUAvalve5 Top Float Silicone

1. Remove the AQUAvalve5 from the tray. Turn off or clamp the supply line to prevent nutrient solution from flowing while you work. Lift the valve out of its tray socket.
2. Open the valve body. The AQUAvalve5 body separates into two halves. Press the retention tabs or unscrew the body depending on your valve version, then separate the halves to expose the internal float mechanisms.
3. Locate the top float and its silicone recess. The top float is the upper float arm assembly inside the valve. Identify the circular recess where the silicone seal sits. If the old silicone is still in place, remove it by hand.
4. Clean the recess before installing the new silicone. Use a clean cloth or paper towel to wipe away any mineral deposits or debris from inside the recess. A clean seat is necessary for the silicone to seal evenly.
5. Press the new silicone into the recess. Orient the silicone correctly — it should sit flush with the surrounding surface of the float. Press it in with a fingertip until it is fully seated and does not move when gently nudged.
6. Reassemble the valve body. Align the two halves and press or screw them back together until the retention tabs click or the threads are snug. Do not overtighten if using a threaded body.
7. Reinstall the valve in the tray and restore flow. Place the valve back in the tray socket, re-open or unclamp the supply line, and observe the valve for one full fill cycle to confirm it opens, fills to the correct level, and closes without leaking.

Sources & Further Reading