Frequently Asked Questions (FAQs)

Yes, we recommend booking 1–3 days in advance. This ensures your preferred time slot and allows better planning of water usage, thus avoiding wastage. We do try to accommodate urgent and same-day requests when possible.

Ideally 1–3 days in advance. Early booking is especially helpful during weekends or peak seasons.

Yes, Clean Sense services are available on weekends and public holidays to cater to the convenience of our customers. Bookings are subject to availability; we recommend booking in advance to secure your preferred day and time slot.

Yes. You can reschedule or cancel up to 12 hours in advance. We request that you avoid last-minute cancellations, as it causes a lot of inconvenience to other customers and disruption to our schedule.

Pricing depends on the number and type of tanks. Contact us for a free estimate. Contact us for a free estimate.

Yes. We offer special prices for bulk bookings (i.e., tanks in multiple houses within the same housing society or gated community scheduled on the same day). Call us to know more.

Yes. We offer AMC. These come with priority scheduling and discounted rates. Call us to know more.

No. Our team will take care of draining the tank as part of the cleaning process. Water is a precious and scarce natural resource. Clean Sense recommends that you keep only minimum water (below 1 foot) in the tanks, prior to cleaning, thus reducing water wastage and speeding up the cleaning time.

No, you don't need to provide anything. Clean Sense arrives fully equipped with all the tools, machinery, and cleaning supplies required to complete the job professionally.

Yes. A 15-amp socket within 10 meters of the tank is required to operate our equipment safely and efficiently.

Here are a few tips:

• Maintain minimum water level (below 1 feet) in the tanks and sumps
• Store sufficient water for essential use
• If apartment/community, inform watchman / concerned person not to fill the tanks one day prior to cleaning. Inform residents about the cleaning schedule to minimize inconvenience
• Ensure unrestricted access to the tanks
• Provide a nearby power socket

Our team will take care of the rest.

For underground or indoor tanks, cleaning continues. For overhead tanks, we may reschedule in case of heavy rain.

The time taken for cleaning can be between 2 and 4 hours, depending on the tank size, condition, and water level.

Yes, water supply will be temporarily unavailable during cleaning. We recommend scheduling the cleaning process during off-peak / lean hours to minimize inconvenience.

That's a valid concern. And, that's why we follow a staggered cleaning approach:

• First, we clean your overhead tanks
• Allow you to pump water from your underground sump (for maximum 10 minutes)
• Then we clean the underground sump

Brief water disruption is expected during overhead tank cleaning.

For apartments or residential buildings, we recommend you schedule the cleaning during lean-usage hours, typically mid-morning or early afternoon, when most residents are at their workplace. This minimizes inconvenience and ensures smooth operations.

We use dewatering pumps, high-pressure jets, sludge removal pumps, vacuum cleaners, and UV light for a deep, hygienic and professional clean.

Yes. It is 100% safe and eco-friendly. Clean Sense follows a 6-stage mechanized water tank cleaning process that is completely safe, hygienic and eco-friendly. It is also highly professional, scientific and effective. Our cleaning process thoroughly cleans, sanitizes and disinfects your water tank, making it fully clean ready to receive a fresh supply of water.

Yes. Our process is effective against mold, algae, and sediment buildup.

Absolutely. You are welcome to observe the process. Our teams follow all safety protocols and will also explain each stage if you're interested.

We dispose of all waste in an eco-friendly manner, either in your rainwater pit or nearby drain.

The only anti-bacterial agent we use is Sodium Hypochlorite (NaClO). It is a widely approved and effective disinfectant that is completely safe for water tank cleaning when used as per standards.

Yes. Just flush taps for 1–2 minutes after refilling.

No. Our process is designed to be non-invasive and tank-friendly. We use appropriate pressure levels to avoid any damage to plastic, concrete, or metal tanks.

Some of the signs include:

• Bad smell from the water
• Water discoloration
• Visible sediment or discoloration of the tank
• Growth of algae
• Presence of insects/pests
• Floating or sunken particles
• Contamination due to mixing of rain/drain water

Yes, we clean loft tanks, commonly found in kitchens, bathrooms, or utility areas. However, our team does not handle the disconnection or reconnection of the tank. You will need to engage a plumber to disconnect and dismount the tank prior to our visit. Once that's done, our team will perform a safe and hygienic cleaning using portable tools designed for such tanks.

Yes. Our portable equipment can handle rooftops, basements, and narrow areas. Please note that we do not carry an upward ascent ladder as part of our equipment.

Yes, depending on accessibility, quantity and water tank type. Additional charges may apply for transportation. Please contact us with complete details such as volume, number and type of tanks, your exact location, etc., to confirm availability and charges.

Our staff are not equipped to paint and/or repair leaks. They can identify and report visible issues like cracks or leaks during cleaning. We recommend you engage a specialist to do the needful.

Yes. GST and other documentation are available upon request for vendor registration, procurement or billing purposes.

Yes. All Clean Sense staff are trained in PPE usage, confined space safety and emergency procedures.

Our staff wear protective gear (masks, boots), and follow safety protocols to ensure both their safety and the hygiene of your water tanks.

We follow full confined space protocols: gas detection, harnesses, blowers, and supervisor oversight.

Yes. All staff are experienced, trained, and covered under insurance.

Yes. We work closely with FMS teams and site engineers to align with access, scheduling, and compliance protocols.

Yes. We clean, fire tanks, flush tanks, etc.

Yes. We provide Tool List Documentation (TLD) for gated entry and audit purposes.

Yes, on request. At least one day prior written request must be provided.

Yes, upon request — we issue a Service Completion Report — for documentation or compliance purposes.