GSC=Galvanized and Stainless Steel Plates Compound

Take Note:GSC is new type of material,widely used as UNDERGROUND water tank

Suitable for both drinking water and firefighting water use (non-drinking)

What is GSC Water Tank?

GSC modular water tank is Galvanized and Stainless Steel Compound water tank.Made from 3 types of raw materials.Inner is stainless steel plate and outer is hot dip galvanized plate with one layer of high modular materials sandwiched.High pressure and high temperature to form this new type of compound plate.Because of inner stainless steel plate and outer steel structure,it has the advantages of storing drinking water. GSC modular water tank could be applied either ground or underground used for rainwater colletion,which effectively solved tight earth issues by underground water tank application.

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The full name of GSC is:


S—Stainless steel



1. Inner layer: 0.5 mm food grade stainless steel 304

2. Outer layer: Galvanized steel


1. The size GSC panels are produced by standard with 1.22*1.22 m, 1*1 m, 1*0.5 m and 0.5*0.5 m.

2. The panel thickness is depends on tank height.

3. The maximum height available is 5 meters (Maximum 4 meters if for underground.


Height Bottom Board Side 1 Side 2 Side 3 Side 4 Side 5 Top board
1000 mm 3 mm 3 mm 2 mm
1500 mm 3 mm 3 mm 3 mm 2 mm
2000 mm 3 mm 3 mm 3 mm 2 mm
2500 mm 4 mm 4 mm 3 mm 3 mm 2 mm
3000 mm 4 mm 4 mm 3 mm 3 mm 2 mm
3500 mm 4 mm 4 mm 3 mm 3 mm 2.5 mm 2 mm
4000 mm 5 mm 5 mm 4 mm 3 mm 2.5 mm 2 mm
4500 mm 5 mm 5 mm 5 mm 4 mm 3 mm 2.5 mm 2 mm
5000 mm 5 mm 5 mm 5 mm 4 mm 3 mm 2.5 mm 2 mm


Item 2 mm 2.5 mm 3 mm  3.5 mm 4 mm 5 mm
500 x 500 mm 6 kg 7.5 kg 9 kg 10.5 kg 12 kg 13.5 kg
500 x 1000 mm 11 kg 13.5 kg 16.5 kg 19 kg 22 kg 24 kg
1000 x 1000 mm 19 kg 24 kg 29 kg 34 kg 39 kg 43 kg


Physical properties Standard requirement Result
Tensile strength ≥350 MPa 405 MPa
Yield strength  ≥220 MPa 296 MPa
 Elongation  ≥23% 24%


1. Concrete beam         2. Outlet flange         3. Inlet flange         4. Manhole         5. External ladder        6. C-channel         7. Vertical support

8. Tie rod plate          9. Sealing rubber         10. Top angle bar

●BOLTS & NUTS——                              1. Hot dipped galvanized                                                                                                             

●SKID BASE ——                                    1.Hot dipped galvanized                                           2.Painting

●INTERNAL STRUCTURE——              1. Hot dipped galvanized                                          2.Stainless steel materials

●FLANGES——                                        1. Hot dipped galvanized                                         2. PVC

●SEALING RUBBER——                         1. Food grade white color EPDM                            2. Silicon

●WATER INDICATOR——                       1. Glass with brass valve                                         2. Float type


1. GSC water tank consists of four types of panels which can customize capacity according local area.

2. The water tank height is usually set within 4 meters,we have set the water tank height up to 6 meters with my engineer good design.

3. GSC modular water tank structure is strong which can be used in underground and above ground used for either drinking water or firefighting water.

4. GSC water tank warranty time is 18 months since shipped out factory or 12 months since installation,based on closed one.

5. GSC water tank mainly used in hospital,residence,campus,supermarket,airport,football ground,irrigation,and somewhere lacking water.


1.All GSC panels consists of three parts including inner stainless steel plate,outer hot dip galvanized plate,middle high molecular compound material.

2. Panels consist of 1220 x 1220 mm,1000 x 1000 mm,1000 x 500 mm,500 x 500 mm four types.

3. Water tank uses the different panel thickness according to above table.

4. U-steel is optional between hot dip galvanized and painting according to customer’s requirement.

5. GSC is widely used underground for saving area and space,above ground and overhead GSC water tanks are also commonly used.


What are water tanks widely used for?

1. Potable Water Storage Tanks

2. Agricultural Irrigation Tanks

3. Septic Tanks and Sewage Tanks

4. Distillation and Process Tanks

5. Fire Reserve Storage Tanks,Swimming Pool Balance Tanks

6. Hot Water Storage Tanks and Chemical Substance Storage Tanks

7. Rain Water Harvesting Tanks,Well Water Tanks,Sea Water Tanks

8. Reverse-Osmosis Water Tanks(water with high or low conductivity)

9. Industrial Process Tanks,Chiller Water Tanks,Cooling Tower Water Tanks


  • What is the GSC water tank used for,drinking or not?

  • What capacity of the GSC water tank and how many flanges?

  • Other details,please kindly let me know in advance.

  • According to above information,we design the drawings for your reference.



With over 20 years factory manufacturing experience and  five years of export experience,we designed and evolved packing a lot for delivery safety and most cost effective.

  • Iron frame for GSC water tank panels.

  • Plywood cases for GSC panels and accessories.

  • Pallet for GSC panels and accessories.

  • Cartons and bags for small pieces of accessories.

  • Each packing will be marked with special tags from factory (Huili only),so it is easy to know which is which during water tank installation.

Connect to your next successful water tank project !



Technical support

  • According to GSC sectional water tank capacity,our engineer will provide detailed drawing for your reference.

  • Customers just need to provide concrete base according to our drawing( Concrete base see below pictures).

  • Our water tank quotation includes all panels and accessories and C-channel base and some spare parts.

  • For each our GSC water tank project,we provide installation manual.

Request for installation manual



GSC water tank inner stainless steel materials,outer hot dip galvanized materials,which decides the good anti-corruption from outside and drinking water storage from inside.


This panel is new type of materials,meet drinking water use and mainly used underground,overground for its better structure.


The size of panel can be 1.22*1.22 m, 1*1 m, 1*0.5 m and 0.5*0.5 m, which can assemble kinds of volume from 0.125 m³ to 5000 m³. That’s extremely convenient to select for you.


Factory precast panel is easy to assemble and disassemble, the construction drawing, installation video, and a series of complete installation plan will be provided.


Using the 1000 T hydraulic press integrated molding, no welding seam at panel corners.


All the HUILI steel material water tank can be bury underground, the thickness of inner structure and panels are thicker than normal tank.



As over 20 years of water tank manufacturer,we have established 4 production lines separately for GRP modular water tank,HDG water tank,Stainless steel water tank,GSC underground water tank,which include 58 skilled engineers, 8 sets of molding pressure machines.

Except above water tank series,we could process and customize other SMC products such as electric pole protection cases,farm planting SMC series.

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