PVC Tarpaulin Water Tank Manufacturer | Flexible PVC Storage Tanks

Q: What is a PVC tarpaulin water tank made of?

A PVC tarpaulin water tank is typically fabricated from woven high-tenacity polyester reinforced with PVC coating on both sides. The polyester provides mechanical strength, while the PVC coating provides the waterproof and weldable surface.

Q: What GSM is suitable for a PVC tarpaulin tank?

There is no universal best GSM. The correct specification depends on tank capacity, filled height, yarn denier, thread density, tensile and tear performance, coating adhesion, seam design and fitting reinforcement.

Q: Can a PVC water tank store oil, chemicals or other industrial liquids?

Compatibility must be checked case by case using the exact chemical or liquid, concentration, pH, temperature and contact duration. A standard PVC water tank should not be assumed suitable for every fuel, solvent or chemical.

Q: Can DERFLEX customize valves, size and branding?

Yes. OEM projects can discuss tank capacity, dimensions, inlet and outlet sizes, vent position, valve type, color, logo, packing, groundsheet and accessories.

Direct Answer

What Is a PVC Tarpaulin Water Tank?

A PVC tarpaulin water tank is a collapsible or flexible storage tank fabricated from polyester-reinforced PVC coated fabric.

The woven polyester reinforcement carries mechanical load, while PVC coating on both sides provides the waterproof, weldable barrier. Panels are joined by a controlled welding process and fitted with inlets, outlets and vents. The finished tank may be a closed pillow / bladder tank, a self-supporting onion tank, a rectangular flexible tank or a coated-fabric liner supported by a frame.

Built for Projects Where Rigid Tanks Are Not Practical

Steel and molded plastic tanks can be effective for permanent installations, but their transport volume and fixed geometry can make them inefficient for temporary, remote, seasonal or rapidly changing projects. A flexible PVC tarpaulin tank packs down when empty and can be transported closer to the point of use.

?Compact when empty: reduces return and storage volume.

?Portable: practical for temporary or remote water projects.

?Custom dimensions: tank footprint can be matched to site constraints.

?Weldable construction: PVC coating supports sealed panel fabrication.

?Replaceable fittings: project-specific valves and couplings can be discussed.

?OEM-ready: color, logo, packing and accessories can be customized.

DERFLEX PVC tarpaulin flexible water tank with hose connection

DERFLEX closed flexible water tank fabricated from coated technical fabric.

Product Family

PVC Tarpaulin Tank Types

The tank form should be selected before finalizing GSM or thickness, because tank geometry changes load paths, filled height, accessibility and connection requirements.

01

Pillow / Bladder Water Tank

A closed flexible tank that rises as it fills. It is a strong choice for portable water storage, irrigation, construction and applications where enclosed storage is preferred.

Compact folded size
Closed water containment
Low-profile filled shape
Custom inlet / outlet layout

02

Onion / Self-Supporting Tank

A quick-deploy open-top or covered tank that becomes self-supporting during filling. Useful where rapid field access and filling are more important than fully enclosed storage.

Fast deployment
Easy visual inspection
Quick fill / drain access
Optional cover and groundsheet

03

Rectangular Flexible Tank

A custom flexible configuration for sites with restricted footprint, transport limitations or defined installation zones. Final dimensions must be reviewed against filled height and material stress.

Custom footprint
Bulk water storage
Project-specific fittings
OEM dimensions

04

Frame-Supported Tank Liner

A reinforced PVC liner supported by a steel or tubular frame. This direction is useful for aquaculture, temporary process water and open-tank applications that require stable geometry.

05

Vehicle / Transport Water Bladder

Flexible bladder designs can be developed for vehicle platforms or remote water transport. Load movement, restraint, baffles and local transport requirements must be evaluated separately.

06

Custom OEM Fabrication

For distributors, tank fabricators and project buyers, DERFLEX can discuss custom fabric construction, capacity, marking, accessories and packaging rather than forcing every order into one stock specification.

Technical Selection

PVC Tarpaulin Water Tank Specifications

Use these values as sourcing directions rather than universal finished-tank limits. Final tank construction should be approved against capacity, geometry, liquid, operating temperature, site conditions and required documentation.

Specification	DERFLEX Project Direction	Procurement Note
Base Material	High-tenacity polyester reinforcement with PVC coating on both sides	Mechanical strength comes from the complete coated textile—not PVC thickness alone.
Reinforcement	1000D-class polyester constructions available; an existing DERFLEX tank reference uses 1000D × 1000D, 20 × 20	Yarn denier and thread density should be selected according to filled load and geometry.
Fabric Weight	Project-specific; an existing DERFLEX heavy water-tank reference uses 1200 gsm	Do not compare suppliers only by GSM. Check tensile, tear, coating adhesion and weld performance.
Thickness	Existing DERFLEX water-tank material direction: approximately 0.7–1.5 mm	Higher thickness may improve some durability aspects but also changes folding and welding behavior.
Capacity	Existing DERFLEX material / flexible-tank references: approximately 100–500,000 L	Very large tanks require review of filled dimensions, ground load, seam stress and drainage.
Welding	HF / RF welding and other compatible thermal welding routes depending on coated fabric and geometry	Representative weld samples should be validated for important OEM programs.
Tank Shapes	Pillow / bladder, onion, rectangular, frame-supported liner and custom fabrication	Tank style should be selected from operating method, access and site footprint.
Connections	Inlet, outlet, air vent, flange, threaded fitting and custom valve positions	Fittings concentrate stress and need dedicated reinforcement around attachment zones.
Ground Protection	Optional groundsheet / protective layer	Recommended on rough concrete, gravel or sites where puncture and abrasion are possible.
Temperature Direction	Selected DERFLEX water-tank materials are specified around -30°C to +70°C	Finished-tank suitability must be confirmed for actual liquid and operating conditions.
Color / Branding	Blue, grey, green, black and other project colors; custom marking available	Confirm print area, folding pattern and seam locations before bulk production.

Specification note: published DERFLEX legacy pages include multiple tank and material constructions. The correct final specification should be confirmed on the quotation / technical sheet for the specific order.

Buyer Insight

GSM, Thickness and 1000D: What Actually Matters?

A PVC tarpaulin tank is a pressure-loaded textile structure. The most useful buying question is not “Which tank has the highest GSM?” but “Which material-and-weld system is designed for my filled dimensions and service conditions?”

1000D / yarn construction: influences tensile capacity and dimensional stability.
Thread density: changes how load is distributed through the woven reinforcement.
PVC coating weight: contributes to waterproofing, weldability and surface protection.
Total thickness: affects abrasion resistance, stiffness, folding and weld behavior.
Coating adhesion: must remain stable under flexing, welding and service load.
Tear strength: matters around fittings, corners, folds and accidental local damage.

A Better RFQ Question

Instead of requesting only “900 gsm” or “1200 gsm,” send:

tank capacity and expected filled height;
maximum available footprint;
stored liquid and operating temperature;
deployment / folding frequency;
site substrate and ground protection;
required connection sizes and discharge rate.

This gives the manufacturer enough information to recommend a more defensible construction.

DERFLEX Product Images

PVC Tarpaulin Water Storage in Different Tank Forms

Existing DERFLEX images show both closed flexible bladders and large open / supported containment systems fabricated from coated technical textiles.

large DERFLEX PVC tarpaulin water storage tank — Large PVC tarpaulin containment application for temporary or project water storage.

DERFLEX flexible PVC tarpaulin pillow water tank — Closed flexible pillow tank with hose connection.

large flexible PVC water bladder tank manufactured by DERFLEX — Large indoor flexible bladder illustrating the importance of footprint and floor preparation.

Capacity & Application

Match Tank Capacity to the Job, Not Just the Available Volume

Capacity Direction	Typical Uses	Important Selection Questions
100–1,000 L	Compact field storage, mobile supply, small equipment / temporary jobs	Handling, connection size, folded dimensions and transport method.
1,000–5,000 L	Farm water, small irrigation, construction service water, backup storage	Groundsheet, filling rate, outlet position and deployment frequency.
5,000–20,000 L	Agricultural irrigation, site supply, temporary municipal / emergency storage	Tank footprint, fabric construction, seam layout and hose support.
20,000–50,000 L	Bulk temporary water, infrastructure, remote projects and emergency reserve	Ground loading, reinforced fittings, safe access and controlled drainage.
50,000–500,000 L	Large engineered water-storage projects	Project drawing, filled height, site preparation, seam stress, valve flow and deployment method.

Applications

Where PVC Tarpaulin Water Tanks Are Used

A

Agriculture & Irrigation

Flexible water storage for fields, orchards, greenhouses, livestock and seasonal irrigation where rigid tank transport is inconvenient.

B

Construction Sites

Temporary service water, dust suppression, cleaning, remote jobsite supply and project water staging.

C

Emergency Water Storage

Rapid-deployment reserve for disaster response, temporary camps and disrupted infrastructure. Required water-contact standards should be specified in advance.

D

Rainwater Collection

Temporary or seasonal storage paired with filtration / collection systems where a collapsible tank is useful.

E

Aquaculture & Water Management

Frame-supported or custom tanks for fish farming, quarantine, RAS and temporary water management.

F

Selected Industrial Liquids

Process water, wash water, wastewater and selected liquid-storage projects can be reviewed. Compatibility must be confirmed against the actual medium before approval.

Selection Guide

Pillow vs Onion vs Rectangular PVC Tarpaulin Tank

Closed Storage

Pillow / Bladder Tank

Closed liquid containment
Compact folded volume
Low-profile shape when filled
Suitable for temporary / portable storage
Requires clean, stable ground support

Fast Field Access

Onion Tank

Self-supporting during filling
Rapid deployment
Easy top access
Useful for emergency and firefighting reserve directions
Optional cover for contamination control

Custom Footprint

Rectangular / Custom Tank

Can be developed around available space
Useful for project-specific layouts
Custom fitting locations
Requires filled-shape engineering review
Good fit for OEM programs

Manufacturing

From PVC Coated Polyester to a Finished Water Tank

DERFLEX's value is not only the finished tank. The company also produces PVC coated tarpaulin material used in flexible containment, allowing material and fabrication discussions to be connected.

1

Application Review

Confirm capacity, liquid, tank type, site footprint, climate, deployment cycle and connection requirements.

2

Material Selection

Match reinforcement, PVC coating, weight, thickness and surface requirements to the operating conditions.

3

Cutting & Panel Layout

Panel geometry and seam locations are planned around the final tank shape and load path.

4

HF / RF Welding

Compatible PVC coated fabric can be joined using high-frequency welding, with weld parameters matched to the selected material.

5

Valve Reinforcement

Inlets, outlets and vents are high-stress zones and require suitable attachment and reinforcement design.

6

Inspection & Packing

Check dimensions, seams, fittings, workmanship and accessories before the tank is folded and protected for shipment.

Compatibility

Water, Potable Water and Industrial Liquids Are Different Specifications

A generic PVC tank should not automatically be described as suitable for every liquid. The correct formulation and finished-tank documentation depend on the actual storage medium and market requirements.

General water: confirm UV exposure, temperature, service cycle and expected storage duration.
Potable / drinking water: specify the required destination-market water-contact standard before material approval.
Industrial liquid: provide chemical identity, concentration, pH, temperature and contact time.
Cleaning / sanitation: identify cleaning chemicals and method if the tank will be repeatedly reused.

PVC vs TPU

When Should You Discuss TPU Instead?

PVC coated polyester is a practical solution for many flexible water-storage programs because it combines reinforcement, waterproofing, weldability and cost control. TPU coated fabric may be considered for selected projects where repeated folding, low-temperature flexibility, abrasion behavior or a specific contact requirement points to a different coating system.

The correct choice should be made from project conditions, not from the assumption that one polymer is universally better.

Compare Flexible Water Tank Material

Installation

Ground Preparation Prevents Avoidable Tank Damage

Even a reinforced PVC tarpaulin tank can be damaged by an unsuitable deployment surface. As the tank fills, thousands of kilograms of water can press the membrane continuously against the ground.

Choose a level, stable surface sized for the fully filled footprint.
Remove stones, screws, metal fragments, roots and sharp construction debris.
Use a suitable groundsheet on abrasive or uncertain surfaces.
Keep the filled tank away from vehicles and uncontrolled sliding / rolling loads.
Support connected hoses so they do not pull continuously on the outlet fitting.
Do not drag a filled or partially filled flexible tank.
Drain, clean and dry the tank according to the stored water / liquid before folding.

large PVC tarpaulin water bladder tank on prepared indoor floor

A large flexible bladder places continuous load on the substrate; footprint and ground protection are part of the product system.

OEM Procurement

What to Include in a PVC Tarpaulin Water Tank RFQ

The fastest route to a useful quotation is to define the operating conditions before asking for a GSM or price.

1. Stored MediumClean water, rainwater, wastewater or exact industrial liquid and required standard.

2. Usable CapacityLiters, cubic meters or US gallons; state whether capacity is nominal or usable.

3. Tank StylePillow, onion, rectangular, frame-supported or request DERFLEX recommendation.

4. Available FootprintMaximum length × width and any height restriction.

5. Operating TemperatureMinimum / maximum air temperature and liquid temperature.

6. ConnectionsInlet, outlet, vent, flange, thread, coupling and target fill / drain rate.

7. Material RequirementTarget GSM, thickness, 1000D construction or compliance requirement if already specified.

8. Site ConditionsIndoor / outdoor, concrete / soil / gravel, UV exposure and groundsheet requirement.

9. OEM DetailsColor, logo, label, repair kit, packing, accessories and documentation.

10. Commercial DetailsQuantity, sample requirement, destination port / country and target delivery date.

Manufacturer Capability

Why Source PVC Tarpaulin Water Tanks from DERFLEX?

Coated Fabric + Fabrication

DERFLEX manufactures PVC coated tarpaulin material and also fabricates flexible containment products, so coated-textile selection and finished-tank production can be discussed together.

Project-Based Specification

Rather than relying on one generic water-tank construction, capacity, thickness, reinforcement and fitting layout can be reviewed against the actual job.

OEM & Bulk Purchase Support

Custom color, logo, packing, valve arrangement, accessories and repeat-order specifications can be discussed for distributors and project procurement teams.

Related DERFLEX Pages

Continue Your Tank & Material Selection

Heavy Duty Tarpaulin TanksHeavy-duty solution hub for reinforced water and liquid storage tanks. Flexible Water BladderPortable and collapsible flexible water storage product direction. PVC Water BladderClosed PVC bladder tanks for mobile and temporary water storage. PVC Tarps for Flexible Water TankCoated textile material direction for flexible water-tank fabrication. Aquaculture TanksFrame-supported and flexible tanks for fish farming and water management. Potable Water Tank Liner MaterialReinforced liner material for projects requiring reviewed drinking-water compliance.

Frequently Asked Questions

PVC Tarpaulin Water Tank FAQ

What is a PVC tarpaulin water tank made of?

It is typically fabricated from woven high-tenacity polyester reinforced with PVC coating on both sides. The polyester provides tensile and tear strength, while the PVC coating provides the waterproof and weldable surface needed for flexible tank fabrication.

What GSM is suitable for a PVC tarpaulin tank?

There is no universal best GSM. DERFLEX has existing tank references that include heavy 1200 gsm construction, but the correct specification also depends on tank capacity, filled height, yarn denier, thread density, tensile and tear performance, coating adhesion, seam design and fitting reinforcement.

Is 1000D PVC tarpaulin suitable for a water tank?

1000D-class polyester reinforcement is used in heavy coated-fabric constructions, including existing DERFLEX water-tank references. However, “1000D” alone does not define suitability. The complete fabric construction, coating, weld behavior and finished tank geometry should be reviewed.

How large can a PVC tarpaulin water tank be?

Existing DERFLEX water-tank material references cover approximately 100 L to 500,000 L. Large-volume tanks should be treated as engineered projects because footprint, filled height, ground loading, seam stress, connection size and safe drainage become more important as capacity increases.

What is the difference between a pillow tank and an onion tank?

A pillow tank is a closed flexible bladder that expands into a low-profile shape during filling. An onion tank is a self-supporting field tank that provides easier top access and rapid deployment. The preferred structure depends on contamination control, access and operating method.

Are PVC tarpaulin water tanks waterproof?

PVC coated polyester is designed as a waterproof technical textile and can be thermally welded into sealed tank panels. Finished-tank leak performance also depends on weld quality, seam design, fitting attachment, material condition and correct deployment.

Can a PVC tarpaulin tank store drinking water?

Only when the selected PVC formulation, seams, fittings and finished system meet the required potable-water or food-contact standard for the destination market and project. Potable-water suitability should be confirmed specifically rather than assumed from the word “PVC.”

Can a PVC water tank store oil, chemicals or other industrial liquids?

Compatibility must be checked case by case. Provide the exact chemical or liquid, concentration, pH, temperature and contact duration. A standard PVC water tank should not be assumed suitable for every fuel, solvent or chemical.

How are PVC tarpaulin tanks welded?

Compatible PVC coated fabrics can be joined by high-frequency / RF welding and other controlled thermal welding processes. Welding parameters, seam width and reinforcement should be matched to the selected fabric and tank design.

Can DERFLEX customize valves, size and branding?

Yes. OEM projects can discuss tank capacity, finished dimensions, inlet / outlet sizes, vent position, valve type, color, logo, packing, groundsheet and accessories. Provide a drawing or complete RFQ for the fastest evaluation.

Request a Custom PVC Tarpaulin Water Tank Quote

Send your required capacity, tank type, stored water / liquid, available footprint, operating temperature, valve details, quantity and destination. DERFLEX can review the PVC coated fabric construction, thickness, fittings, OEM requirements and finished-tank direction before quotation.

Request A Quote Email sales@derflex.com