This high-quality replacement rubber O-ring is designed specifically for use with the SUNSUN HW-704A and 704B series canister filters. It restores the filter’s sealing performance, helping to prevent leaks and maintain optimal operation.
Key Benefits
- Exact fit for SUNSUN HW-704A & HW-704B models.
- Restores the canister’s seal integrity — important after years of use or when O-ring shows wear, cracking, or flattening.
- Helps prevent leaks and potential water damage—especially critical for aquariums or setups inside cabinets.
- Cost-effective spare part vs full unit replacement; ensures continued reliable performance.
Usage & Maintenance Notes
- When servicing your canister filter, inspect the existing O-ring for signs of wear (flattening, cracks, loss of shape) and replace if needed.
- Before re-assembling the filter, lightly lubricate the new O-ring with aquarium-safe silicone grease to help maintain a good seal.
- Make sure the O-ring groove and mating surfaces are clean and free of debris, then seat the ring evenly into the groove before re-closing the canister.
- After installation, check for proper fit and check around the lid area for any signs of seepage once the filter starts up.
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