FRP Bio-Tank Interconnection — 12KL System, Chettinad Hospital, Kalpakkam
FRP TANK WORKS
CASE FILE 12KL–CHT–KLP
Installation Case Study

Four tanks. One system.
12KL of interconnected capacity.

A modular FRP bio-tank network delivering hospital-grade wastewater treatment at Chettinad Hospital, Kalpakkam — built from four reusable 3KL units instead of one fixed structure.

Site
Chettinad Hospital, Kalpakkam
Required Capacity
12 KL
Configuration
4 × 3 KL, Interconnected
Material
FRP (Reusable)
FRP bio-tank lowered into excavated pit at Chettinad Hospital, Kalpakkam, showing riser vents and interconnection piping.
FIG. 00 — TANK BODY IN EXCAVATION, KALPAKKAM SITE
INTERCONNECTED MANIFOLD RUN — COMMON INLET / OUTLET HEADER TANK 01 3 KL TANK 02 3 KL TANK 03 3 KL TANK 04 3 KL TOTAL = 4 × 3KL = 12KL
01 — DESIGN RATIONALE

Why interconnect four tanks instead of casting one

05 FACTORS
01

Modularity

Smaller 3KL units move easily through restricted hospital access roads and tighter installation footprints.

02

Reusability

Each 3KL FRP tank is an independent module — redeployable or relocatable without discarding the whole system.

03

Redundancy

Any single tank can be isolated for inspection or servicing while the other three keep the system running.

04

Load Distribution

Spreading 12KL across four units reduces structural stress versus one oversized tank.

05

Faster Install

Pre-fabricated units are interconnected on-site in a fraction of the time a custom-cast tank would need.

02 — TECHNICAL REFERENCE

Interconnection keywords & components

Manifold SystemCommon inlet / outlet header connecting all four tanks into one hydraulic circuit
Inter-tank PipingFRP / PVC lines linking each 3KL unit to the balancing pipeline
Balancing PipelineEqualises flow and pressure so no single tank is overloaded
Reusable ModulesEach tank functions as a standalone unit, redeployable elsewhere if needed
Capacity Expansion3KL × 4 = 12KL, expandable in further 3KL increments
Joint SealingAirtight interconnection joints rated for continuous bio-digester service
FittingsAnti-corrosive FRP fittings suited to hospital wastewater composition
03 — INSTALLATION SEQUENCE

How the 12KL system works

05 STEPS
01

Position the four 3KL tanks

Units are placed at the designated site within the hospital premises, arranged for shortest pipe runs.

02

Interconnect inlet & outlet

Tanks are linked using FRP/PVC piping so wastewater flows sequentially or in parallel across all four units.

03

Fit the common header

A shared header line balances flow and pressure so no single tank carries excess load.

04

Commission the network

The interconnected system is tested end-to-end and brought into continuous service.

05

Reserve for future expansion

Additional 3KL tanks can be added to the same network later without replacing existing infrastructure.

04 — SITE RECORD

Installation gallery

02 PLATES
FRP bio-tank lowered into excavated pit at Chettinad Hospital, Kalpakkam, showing riser pipes and interconnection piping on the near end.
FIG. 01Tank body positioned in excavation — riser vents & inlet/outlet stubs visible
FRP bio-tank installed in trench, full length view, with interconnection piping loop on the right end and protective film still wrapped on the shell.
FIG. 02Full trench view — interconnect loop & multi-chamber risers along the top
05 — OUTCOME

Benefits for a healthcare facility

Hygienic, leak-proof containment suited for hospital wastewater streams.

Space-efficient layout using four smaller tanks instead of one bulky structure.

Lower long-term cost from the reusability of individual tank units.

Easy scalability — capacity grows in clean 3KL increments as needed.

Quick deployment with minimal civil work versus concrete tank construction.

Corrosion resistance and long service life from FRP construction.