How to prevent common Plastic Tank Cleaning problems and when to call a pro

Quick answer (read this first)

• Regularly inspect your tank for leaks or damage.
• Clean the tank every 3-6 months to prevent buildup.
• Use appropriate, mild cleaning agents suitable for plastic.
• Ensure good ventilation during the cleaning process.
• Check all inlet and outlet pipes for any blockages.

Safety first

• Always wear gloves, a mask, and eye protection.
• Ensure the area is well-ventilated to avoid inhaling fumes.
• Never mix different cleaning chemicals.
• Disconnect power to any water pumps connected to the tank.
• Avoid entering the tank if you are alone or feel unwell.

Tools you may need

• Stiff bristle brush
• Bucket and mug
• Mild cleaning agent (e.g., bleaching powder, vinegar, mild detergent)
• Garden hose or pressure washer (optional)
• Safety gear (gloves, mask, eye protection)
• Flashlight (for internal inspection)

Step-by-step

Step 1

Turn off the main water supply to your home and completely drain the plastic tank through its outlet valve until it’s empty.

Step 2

Using a stiff brush, scrape off any accumulated sludge, sediment, or algae from the bottom and inner walls of the tank. Scoop out or flush loose debris.

Step 3

Prepare your cleaning solution by mixing a mild cleaning agent (like bleaching powder, white vinegar, or detergent) with water as per product instructions. Apply it evenly to all interior surfaces.

Step 4

Allow the cleaning solution to sit for 15-30 minutes, then thoroughly scrub all internal surfaces, including the tank lid and all connection points, to remove stubborn grime and film.

Step 5

Rinse the tank vigorously and repeatedly with fresh water using a garden hose or pressure washer. Ensure all cleaning solution residue is completely flushed out until the water runs clear.

Step 6

Close the outlet valve and refill the tank with fresh water. Allow the water to run through a tap for a few minutes to ensure it’s clear, odor-free, and safe for normal use before turning the main supply back on.

Step 7

After refilling, carefully inspect the tank’s body, lid, and all pipe connections for any signs of new leaks, drips, or structural damage.

Common mistakes

• Not fully draining the tank before initiating the cleaning process, which dilutes cleaning agents.
• Using harsh or abrasive chemicals (e.g., strong acids) that can degrade or damage the plastic tank liner.
• Forgetting to thoroughly clean the tank lid, inlet, and outlet connections where bacteria and grime can also accumulate.
• Insufficient rinsing, which can leave harmful chemical residues in the tank, affecting water quality.
• Performing the cleaning without wearing proper personal safety gear, risking exposure to chemicals or contaminants.

When to call a professional

• If you observe large cracks, significant structural damage, or persistent leaks that DIY methods cannot fix.
• When a foul odor, persistent water discoloration, or unusual taste remains even after thorough cleaning and rinsing.
• If the tank is located in a high or confined space, making it difficult or unsafe to access and clean properly.
• For complex plumbing issues such as faulty valves, pump malfunctions, or blockages directly linked to the water tank system.
• When you suspect severe bacterial or viral contamination that requires professional disinfection and testing beyond simple cleaning methods.