Plastic water storage barrels are a practical solution for emergency water, rain harvesting, and long-term off-grid storage. Proper cleaning removes biofilm, algae, and odors, ensuring stored water stays safe and palatable. This guide walks American households through a clear, step-by-step process using common cleaning tools designed for plastic drums and wide-mouth barrels.
Quick Answer
Start with a rinse to remove loose debris, scrub the interior with a plastic drum brush or scraper, sanitize with a safe solution, and rinse thoroughly. Allow the barrel to air-dry completely before resealing. For stubborn residue, repeat with a stronger scrub or a follow-up sanitizer.
What You’ll Need
- 55 gallon drum cleaning brush plastic handle
- drum cleaning kit for water storage barrels
- HDPE barrel cleaning brush wide mouth
- plastic drum scraper and scrubber set
- water storage barrel sanitation kit
Before You Start
Ensure the barrel is empty and the cap is accessible. Work in a well-ventilated area and wear gloves to protect skin from cleaning agents. Inspect the barrel for cracks or leaks; any damaged barrels should be retired from water storage. If the barrel previously contained chemicals or unknown substances, consider a more thorough rinse and a different sanitizer approach. Plan for a total cleaning window of 1–2 hours, plus time for drying. Never mix stronger cleaners with mild ones and follow label instructions for any chemical used.
Step-By-Step: How To Clean Plastic Barrels For Water Storage
- Rinse the barrel with clean water to remove loose dirt and sediment.
- Use a long-handled HDPE barrel cleaning brush wide mouth to scrub the interior walls, focusing on corners and the bottom.
- For stubborn residue, switch to a plastic drum scraper and scrubber set to lift stuck deposits without scratching the plastic.
- Rinse again to remove loosened material and debris.
- Prepare a sanitizing solution appropriate for potable water (e.g., a recommended EPA-registered sanitizer). Apply according to the product directions.
- Scrub any inaccessible spots by tilting the barrel and cleaning the neck area with a narrow brush from the 55 gallon drum cleaning brush plastic handle set.
- Allow the sanitizer to sit for the contact time specified by the product, then thoroughly rinse the interior with clean water until no residue remains.
- Air-dry the barrel with the cap removed or loosely attached to promote complete dryness. If needed, place the barrel upside down to accelerate drying.
- Reinspect for any odor or remaining films. If detected, repeat the cleaning cycle or switch to a different sanitizer approach.
- Seal the barrel with a clean cap, label the contents, and store in a cool, shaded area away from potential contaminants.
- Document the cleaning date and the sanitizer used in a log to track maintenance over time.
Troubleshooting
| Symptom | Likely Cause | Fix | Prevention |
|---|---|---|---|
| Persistent odor after cleaning | Residual organic matter or biofilm | Repeat cleaning with a stronger sanitizer or use a dedicated water storage kit | Clean on a strict schedule; avoid storing dirty water |
| Discoloration inside barrel | Algae growth or mineral deposits | Increase contact time with sanitizer; consider a soak with a suitable cleaner | Rinse thoroughly and dry completely between uses |
| Scratches or cracks found | Right tools or improper scrubbing | Replace damaged barrel; use gentler scrubbing methods next time | Inspect regularly and avoid harsh abrasives |
| Unclean corners or neck area | Limited access | Utilize narrow brushes and scrapers to reach tight spots | Choose a kit with specialized attachments |
Common Mistakes
- Using non-food-grade cleaners inside potable water barrels
- Skipping a thorough rinse after sanitizing, leaving chemical residues
- Forgetting to air-dry completely, which invites mold growth
- Overlooking small cracks or hidden damage that can compromise storage safety
Tips For Best Results
Pre-wet the interior before scrubbing to reduce surface friction and make debris easier to remove. Use a dedicated drum cleaning kit for water storage barrels and only attach tools designed for plastic drums to avoid scratching. For best sanitation, rotate between sanitizers if a persistent odor or biofilm returns. Label every cleaning with date and product used to maintain a routine schedule. Consider storing water in a cool, shaded area to minimize algal growth between cleanings.
Call A Professional
Seek professional help if the barrel shows cracks, persistent leaks, or severe damage that compromises its integrity. If you suspect contamination with hazardous substances or if the interior remains stained after multiple cleanings, contact a water storage or plastics specialist. Do not attempt to repair structural damage with temporary fixes.
FAQ
Can I use bleach to sanitize plastic water barrels?
Yes, but only with proper dilution and thorough rinsing. Bleach can leave residues that affect taste and safety if not fully rinsed.
How often should I clean a water storage barrel?
Typically every 6–12 months, or more often if the barrel is used for drinking water in warm climates or if odor appears.
What cleaners are safe for HDPE barrels?
Choose cleaners labeled safe for HDPE plastics and potable water use, following manufacturer directions.
Do I need to dry the barrel completely between uses?
Yes. Complete drying minimizes microbial growth and helps prevent odors before refilling.
Is a water storage sanitation kit necessary?
Not always, but a dedicated sanitation kit simplifies disinfection and reduces the chance of chemical residues.
Buying Guide
When choosing tools and kits for cleaning plastic water barrels, consider size, compatibility, and ease of use. A complete setup often includes a long-handled brush, a set of scrapers, and a dedicated sanitation kit. Look for products designed for food-grade barrels and HDPE plastics to ensure safety and durability. Pay attention to brush stiffness—soft to medium is typically best for plastic interiors to avoid scratching. Consider a kit with narrow attachments for wide-mouth and small-neck barrels. Noise, weight, and ergonomics matter if you work in large-scale storage setups. Finally, compatibility with your barrel size (usually 55 gallons) and the type of cap or venting your barrel uses will influence your choice.