General Specifications

Standard :

Singapore Standard SS245: 2014 Similar to British Standard BS 7491 Part 3:1994 and BS EN 13280:2001

Materials :

Sheet Moulding Compound(SMC)consists of:

  • Resin- Isophthalic unsaturated polyester resin conforming to BS 3532 specification
  • Fiber Glass- Low alkali fibre glass conforming to JIS R3411 to R3417 or BS 33396, BS 3496 and BS 3749 specifications
Manufacturing Process :

Hot pressed SMC compression moulding

Tank Structural Support :
Tie-rod System:


  • Standard Type : Hot Dipped Galvanised Steel


  • Standard Type : SS 304 Tie-Rod , Optional SS316
  • Roof Support : PVC/ABS pipes with GRP roof panel stiffener
External Braced System :


  • Hot Dipped Galvanished Steel


  • None (metal free inside, non-partitioned tank only)
  • Roof Support: PVC Poles with GRP roof panel stiffener
Sealant :

Non toxic PVC foam/EPDM Rubber

Bolt, Nuts, Washers :


  • Standard : Hot Dipped Galvanised Steel
  • Optional : SS 304/316


  • Standard : SS 304 (In-contact with water)
  • Optional : SS 316 (In-contact with water)

Roof :

  • Standard: Hot Dipped Galvanised Steel
  • Optional: SS 304/316
Ladder :


  • Standard : Hot Dipped Galvanised Steel


  • Standard : PVC or Aluminium
  • Optional : GRP or SS304/316
Water Level Indicator :
  • Standard : Reversed Reading Mechanical Ball Float Type (Cat & Mouse)
  • Optional : Direct Reading Clear Tube Type
Nozzel Panel :
  • Pipe nozzels not inclusive
  • Flat panels will be provided on request
GRP Panel Design

By encapsulating a 25mm ~ 50mm layer of rigid polyurethane foam, POTAGLAS pre-insulated panel could maintain the desired water temperature stored inside the tank under extreme temperature condition. POTAGLAS pre-insulated panel could be selected for water storage where there is a need to stabilize the temperature against extreme heat or freezing conditions so to prevent dew formation.

  • *Flange height (FH) varies according panel series
  • *Standard colour: gray

Performance of Panels

CharacteristicsPotaglas GRP –
Tank Panel Performance
Acceptance Criteria
(SS 245:2014 Specification)
Tensile Strength (MN/m²)> 103>70 (min)
Bending Strength (MN/m²)> 171> 100 (min)
Elastic Modulus in Bend (MN/m²)> 12260> 6000 (min)
Glass Content (%)> 40> 25 (min)
Barcol Hardness57>30 (min)
Water Absorption (%)0.10.5 (max)
Skid Base Specifications
Tank HeightMain BeamSub BeamConcrete Plinth
1.0mnot providednot provided1000mm c/c
1.5mHollow Section 50mm x 50mm x 3mmHollow Section 50mm x 50mm x 3mm1000mm c/c
2.0mHollow Section 50mm x 50mm x 3mmHollow Section 50mm x 50mm x 3mm1000mm c/c
2.5mHollow Section 50mm x 50mm x 3mmHollow Section 50mm x 50mm x 3mm1000mm c/c
3.0mHollow Section 50mm x 50mm x 3mmHollow Section 50mm x 50mm x 3mm1000mm c/c
3.5mC-channel 150mm x 75mm or
I Beam 150mm x 100mm
Angle bar 6mm x 75mm x 75mm or
C-channel 50mm x 100mm
1000mm c/c
4.0mC-channel 150mm x 75mm or
I Beam 150mm x I Beam 150mm x 100mm
C-channel 50mm x 100mm1000mm c/c
*Potaglas reserves the right to provide alternate skid base designs

Potaglas recommends an ideal concrete plinth size of 300mm (W) x 500mm (H), with maximum variance in height of not more than 2mm

Internal Tie-Rod Design

Potaglas GRP sectional water tank is constructed with bottom, side and top panels, completes with external and internal structural reinforcement and necessary tank accessories to facilitate water storage.

Main ComponentsExternal Structural SupportInternal Structural SupportTank Accessories
Top PanelBody AnglePoleAccess Manhole
Side PanelCorner AnglePole SupportAir Vent
Bottom PanelTie RodWater Level Indicator
Drain/Pit PanelFlat BarRoof SupportInternal Ladder
Stay PlateIn Corner BracketExternal Ladder
External Braced Design
Main ComponentsInternal Structural SupportExternal Structural SupportTank Accessories
Top PanelPoleFlat BarAccess Manhole
Side PanelPole SupportBody AngleInternal Ladder
Bottom PanelRoof SupportExternal Ladder
Drain/Pit PanelIn Corner BracketC-ChannelAir Vent
Vertical I BeamTube Level Indicator
Roof Flat Bar
Side I Beam Support Bracket
External Bracing Support