With the increasing demand for efficient water storage solutions across the farming, industrial, and domestic sectors, flexible water storage tanks have become a popular choice. However, before these tanks can be legally manufactured or sold in India, they must comply with Bureau of Indian Standards certification requirements.

In this blog, we will explore everything you need to know about BIS certification for flexible water storage tanks, including its importance, applicable standards, certification process and benefits.

What is BIS Certification?

The Bureau of Indian Standards is the national body relaible for maintaining the quality, safety and reliability of products in India.

Under the BIS Act, 2016, certain products must comply with Indian Standards and obtain a BIS license before they can be manufactured, imported or sold in India.

BIS certification makes sure:

• The product meets the Required quality and safety standards.
• Consumers receive safe and Enduring products.
• Manufacturers build brand credibility and reach wider markets.

Read More: Introduction To Bureau Of Indian Standards

Applicable Standard for Flexible Water Storage Tank

The BIS standard that governs flexible water tanks is:

IS 16823:2021 – Flexible Water Storage Tanks

This standard specifies requirements for:

• Material composition
• Construction and design
• Performance testing (pressure, leakage, and durability)
• Visual inspection
• Marking and labelling requirements

BIS Certification Scheme Applicable

Flexible Water Storage Tanks fall under the Mandatory BIS Certification Scheme

This means manufacturers must obtain a BIS ISI Mark License before selling the product in India.

• Type of License: BIS ISI Certification 
• Product Category: Flexible Water Storage Tanks
• Standard Number: IS 16823:2021

Documents Required for BIS Certification for Flexible Water Storage Tank

Below we mentioned required documents for BIS certificate for flexible water storage tank

Category	Documents Required
Company Details	Certificate of incorporation, factory license, MSME/Udyam registration, GST certificate
Manufacturing Infrastructure	List of machinery, layout plan, process flow diagram
Testing Facilities	List of in-house testing equipment with calibration certificates
Product Details	Technical specifications, drawings, raw material details
Quality Control	Internal test reports, quality assurance manual
Authorized Representative (if foreign manufacturer)	AIR nomination form, authorization letter, Indian office details

Read More: Documents Required For BIS Registration

Process BIS Certification for Flexible Water Storage Tanks

Below we mentioned staps to obtain BIS certificate for flexible water storage tanks

Step 1 – Filing the Application: Apply online through MANCOLINE portal by selecting the relevant product standard.

Step 2 – Document Review: BIS officials verify your documents and may request additional technical details.

Step 3 – Sample Testing: A product sample is taken from your factory and tested in a BIS-approved Lab to confirm compliance with IS 16823:2021.

Step 4 – Factory Audit: BIS officers conduct on-site audits to Review your production facilities, testing setup and quality system.

Step 5 – License Grant: If all Criteria are satisfied, BIS grants you ISI Mark License, allowing you to place the ISI logo on your flexible water tanks.

Read More: Process for getting BIS for Certification

Validity and Renewal of License

• The BIS license is valid for 2 years from the date of issue.
• It can be renewed by submitting the renewal application along with production and testing records before the expiry date.
• Regular surveillance audits and product testing are conducted to maintain license validity.

Benefits of BIS Certification for Flexible Water Storage Tank

Obtaining a BIS certification for flexible water storage tank license provides several advantages:

• Legal Compliance: Completes mandatory regulatory requirements under BIS Act.
• Quality Assurance: Confirms product durability, leakage Refusal, and safety.
• Market Access: Enables participation in government tenders and bulk supply contracts.
• Consumer Trust: Builds brand reputation through the ISI mark.
• Export Advantage: Boosts acceptance in international markets due to standardised quality.

BIS Certification for Importers

Foreign manufacturers exporting Flexible Water Storage Tanks to India must obtain a BIS FMCS (Foreign Manufacturers Certification Scheme) license.

Under this scheme:

• The application is filed from the home country.
• BIS conducts overseas inspection.
• An Indian Authorized Representative is appointed to coordinate compliance.

Penalties for Non-Compliance

Selling or importing flexible water tanks without BIS certification attracts penalties under Section 29 of the BIS Act, 2016, which may include:

• Fine up to ₹5 lakh
• Imprisonment up to 2 years
• Product recall and cancellation of license

How ELT Corporate Can Help

At ELT Corporate, we specialise in end-to-end BIS certification services for Flexible Water Storage Tanks. Our expert team assists with:

• Standard identification and applicability check
• Technical documentation and application filing
• Coordination with BIS testing laboratories
• Factory audit preparation
• License issuance and post-approval compliance

Whether you are an Indian manufacturer or foreign exporter, we ensure a smooth and compliant BIS registration process within minimum turnaround time.

Conclusion

The BIS certificate for Flexible Water Storage Tanks is not just a compliance requirement—it’s a mark of trust, quality, and safety.

As demand for flexible storage systems continues to rise, manufacturers who proactively obtain BIS certification gain a significant edge in both domestic and international markets.