Thetford Aqua‑Magic V Replacement Blade Seal — High & Low Foot, OEM‑fit Elastomer

This replacement blade seal for the Thetford Aqua‑Magic V High and Low Foot models restores the toilet blade’s water retention so the bowl holds water properly.

If your Aqua‑Magic V appears to close correctly but the toilet bowl won't hold water, the blade seal is the most common cause. This precision-molded gasket sits along the blade edge and creates a watertight barrier when the flush blade is closed. Installing a fresh seal stops seepage around the blade and helps maintain the normal water level, improving hygiene and reducing unpleasant odors from evaporating bowl water.

Why won't my Aqua‑Magic V keep water in the bowl?

The blade seal can become compressed, torn, or warped over time, allowing water to leak past the blade even when it looks closed. Debris buildup or mineral deposits on the blade edge or seal can also prevent a tight contact. Replacing the seal re-establishes the intended barrier between bowl and discharge.

• Signs: low bowl water despite a fully closed blade
• Cause: aged or damaged blade seal that no longer compresses evenly
• Fix: remove old seal, clean blade area, install new Thetford blade seal

How hard is it to replace the blade seal on an Aqua‑Magic V?

Replacement is straightforward with basic tools and moderate DIY skills. The process typically involves removing the blade assembly or opening the blade housing, taking out the worn seal, and pressing the new one into the groove. Follow the toilet’s service instructions for safe removal and reassembly.

• Tools: small screwdriver or plastic trim tool, mild cleaner, towel
• Time: most users complete the swap in 15–30 minutes
• Tip: clean mating surfaces before seating the new seal for best performance

Will this Thetford TH31708 seal fit all Aqua‑Magic V variations?

This blade seal is designed specifically for the Aqua‑Magic V High and Low Foot toilet variants. It matches the blade geometry and material specifications used in those models, ensuring a proper fit and reliable water retention. Confirm your toilet model before ordering to ensure compatibility.

• Compatible with: Aqua‑Magic V High Foot and Low Foot models
• Material: durable elastomer molded to OEM profile
• Not for: other toilet families or non‑Aqua‑Magic V designs

How will a new blade seal improve everyday use?

Installing a fresh seal restores normal bowl water level and reduces the need for frequent manual refills or odor control measures. It also stops slow leaks that can promote bowl stains or waste water. The result is a cleaner, more reliable toilet performance while traveling or in storage.

• Benefit: consistent bowl water keeps seals odor‑suppressed
• Benefit: reduces water loss and potential staining
• Benefit: extends the life and performance of the existing blade assembly

Who is this for: RV owners, boaters, and mobile‑home residents who use Thetford Aqua‑Magic V High or Low Foot toilets and need a direct replacement part to stop water seepage from the bowl. It's ideal for DIYers who prefer to repair their sanitation system themselves, maintenance technicians servicing fleets, or anyone preparing a vehicle for storage who wants to maintain proper bowl water levels and hygiene.