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General Causes of Premature Seal Failure – not brand specific

  1. Over inflation / excessive pressure to fill large gaps between lid and tank
    • Do not exceed 1 bar pressure
    • Consider a seal profile with extra expansion to fill large gaps
  2. Rubbing/abrasion due to a bent lid arm
    • Ensure the lid arm is centered and the seal does not rub on the tank when raising/lowering the lid
    • A bowed/bent lid arm pushes the lid against the inside tank walls and will wear a hole in the seal. Repair bent lid arms to ensure they are centered to eliminate rubbing
  3. Other abrasion
    • When moving an unattached lid, do not roll the lid on the ground with the lid seal in place
  4. Impact – rubber cannot be both soft/inflatable and hardened for impact resistance
    • Avoid any contact with the lid seal and sharp edges when moving the lid outside the tank.  
  5. Excessive stretching – wrong seal length
    • Seals can usually stretch up to 3-5% of their original length. Excessive stretching will cause stress on the bond where the seal is joined into a circle. Excessive stretching and over inflation will cause premature failure.

Slow Leaks

If a seal system is experiencing a slow leak, each component should be inspected and tested

Leaks can occur at various places in the system such as the air hose, air hose clamp, air hose valve, seal air stem, seal body.

If possible remove the seal from the lid and completely immerse in clean water if possible. Slowly inflate the seal – DO NOT EXCEED 15psi / 1 bar pressure. The source of the leak should become apparent.

Air stem leak:  Ensure the air stem is properly installed and tightened. See our air stem instructions. Ensure the rubber washer is flat and not twisted. Do not over-tighten the nut – the washer must be flat and not twisted/deformed in order to hold pressure. Over-tightening can also pull the air stem base right out of the seal. Tightening the nut with a hand held wrench is sufficient.

Leak on the seal body: Determine the spot of the seal. Detail whether the leak is on the inside or outside surface. Take pictures of the leak location and contact for warranty support.

Air hose leaks: Replace any third party leaking air hose, clamps and valves as required.