FRP Chemical and Wastewater Treatment Tanks

Page updated: October 2026

Mui Fatt Marketing Sdn Bhd supplies FRP chemical and wastewater treatment tanks in Malaysia, manufactured by its subsidiary Y.T. Fibreglass Industries Sdn Bhd in Port Klang. The range covers five open-top tank shapes and a closed sludge settling tank, from 1 m to 3 m in diameter (4 m subject to road access) and up to 4 m wide and 8 m long. Every tank is built to the customer's drawing in GP, ISO or vinyl ester resin, checked before delivery, and typically made in 7 to 14 working days.

These tanks hold water treatment chemicals, wastewater and sludge in wastewater treatment plants, sewage treatment plants and chemical plants. Customers often ask for them as a PAC chemical holding tank, a clarifier tank, a bio tank, a sludge holding tank or a sludge settling tank. Every tank is made to order, with the resin matched to the liquid it will hold.

FRP and GRP are two names for the same material: glass-fibre reinforced plastic. In Malay these tanks are often searched as tangki air sisa FRP or tangki enap cemar gentian kaca.

Key Features and Benefits

Built to Your Drawing

Send us your drawing and what the tank will hold, and we make the tank to suit your plant. If you have no drawing, we propose a standard design for you to approve. There is no fixed catalogue size you have to fit around.

Resin Matched to the Chemical

We choose GP, ISO or vinyl ester resin for the liquid, its concentration and its temperature. A hybrid build with vinyl ester inside and GP outside is also available.

Working temperature: GP resin 25°C to 40°C. Vinyl ester about 40°C to 75°C, depending on the chemical.

Corrosion Resistant

FRP does not rust. Wet plant rooms, outdoor sites and chemicals that attack mild steel do not eat the tank wall.

Seamless Round Bodies

Round tank bodies are filament wound and then laminated, so there are no welded seams to leak or rust.

Light to Install

FRP is far lighter than steel or concrete, so tanks lift into place with smaller cranes and lighter supports.

Checked Before Delivery

Every tank gets a Barcol hardness test, a thickness check and a leak test before it leaves the factory.

Fast Production

Tanks are typically produced in 7 to 14 working days, subject to the production schedule. Vinyl ester tanks need about 5 more working days to order the resin.

FRP Chemical and Wastewater Tank Specifications

Specification	Details
Product type	FRP chemical and wastewater treatment tanks, open-top and closed
Brand / supplier	Mui Fatt Marketing Sdn Bhd
Manufacturer	Y.T. Fibreglass Industries Sdn Bhd, Port Klang
Shapes	Round flat base, round conical base, square pyramid base, rectangular with partition, vertical sludge holding, closed sludge settling (horizontal or vertical)
Round tank size	Diameter 1 m to 3 m (4 m subject to road access)
Square and rectangular size	Width 1 m to 4 m, length up to 8 m
Height	Under 4 m for road transport, 3 m suggested
Manufacturing process	Round tanks filament wound then laminated; square and rectangular tanks hand laid up on a wooden mould
Resin	GP (orthophthalic), ISO (isophthalic), vinyl ester, or hybrid; from established resin makers such as AOC and Eternal
Working temperature	GP resin 25°C to 40°C; vinyl ester about 40°C to 75°C, depending on the chemical
Corrosion barrier	Optional resin-rich inner layer with polyester veil
Outdoor protection	Gelcoat with surface veil on the outside
Design standard	BS 4994 / BS EN 13121 for all tanks; ASTM D3299 for filament wound round tanks; engineering calculation on request
Drawing approval	General arrangement drawing sent for your approval before production
Support stand	Bare mild steel, mild steel laminated with FRP, or pultruded FRP
Nozzle flanges	Standard off-the-shelf HDPE flanges; FRP flanges on request
Options	Cover, fiberglass ladder, railing, level strip or level tube, partitions
Quality checks	Barcol hardness test, thickness check and leak test on every tank
Warranty	1 year standard; extended warranty on request
Lead time	Typically 7 to 14 working days; about 5 more working days for vinyl ester
Repair	Repair and relining of existing FRP tanks
Delivery	Peninsular Malaysia; Sabah and Sarawak through a freight agent

Models and Sizes

Model	Size	Use
FRP Round Open-Top Tank, Flat Base →	Diameter 1 m to 3 m (4 m subject to road access)	Pre-treatment water, sludge water
FRP Round Open-Top Tank with Conical Base and Support →	Diameter 1 m to 3 m (4 m subject to road access)	Clarifier, bio tank, coagulation tank, PAC chemical holding tank
FRP Square Tank with Pyramid Base (Primary Clarifier) →	Width 1 m to 4 m, height under 4 m	Primary clarifier, settling tank
FRP Rectangular Open-Top Tank with Mild Steel Support and Partition →	Width 1 m to 4 m, length up to 8 m, height under 4 m	PAC chemical holding tank
FRP Sludge Holding Tank →	Diameter 1 m to 3 m, standing vertically	Sludge holding before the filter press
FRP Sludge Settling Tank (Tangki Enap Cemar) →	About 1,000 L to 100,000 L, horizontal or vertical	Closed sludge settling tank

Example Capacities

Tank	Size	Approximate volume
Round, flat base	2 m diameter x 2 m high	about 6,300 L
Round, flat base	3 m diameter x 3 m high	about 21,200 L
Square, pyramid base	3 m x 3 m, 2.5 m straight wall	about 22,500 L above the pyramid
Rectangular	4 m x 2 m x 2 m high	about 16,000 L
Sludge holding	2 m diameter x 4 m long	about 12,600 L

Volumes are approximate and for guidance only. Every tank is built to your sizes.

Applications

• Wastewater treatment plants: pre-treatment water, clarifiers, bio tanks and sludge holding.
• Sewage treatment plants: sludge settling tanks and sludge holding tanks.
• Chemical dosing: PAC chemical holding tanks and coagulation tanks.
• Chemical plants and factories: holding tanks for acids, alkalis and process liquids, with the resin chosen to suit.
• Water treatment contractors: tanks made to the contractor's own plant drawing.

Materials and Construction

Round tank bodies are filament wound and then laminated. Square and rectangular tanks are hand laid up on a wooden mould. The test results below are for the GP laminate used in our Mui Tank range; chemical-grade laminate data is available on request.

Resin Selection Guide

• GP (orthophthalic polyester): for water and mild, non-aggressive liquids.
• ISO (isophthalic polyester): a premium polyester with good chemical resistance.
• Vinyl ester: for severe corrosion, including strong acids and alkalis. For solvents, tell us the chemical and we will confirm.
• Hybrid: vinyl ester inside for chemical resistance, GP outside for economy.

A resin-rich inner layer with polyester veil can be added on the wet side as an extra corrosion barrier. This inner layer is what protects the structural wall from the chemical, so a thicker barrier gives a longer life in aggressive service. Tell us the chemical, its concentration and its temperature, and we will recommend the resin and the inner layer. We use resin from established makers such as AOC and Eternal, and the resin maker's chemical resistance data can be supplied with your quote.

For outdoor tanks, the outside is finished with gelcoat and a surface veil to protect the laminate from sunlight and weather.

Laminate Test Results (GP laminate, Mui Tank range)

Property	Result	Limit
Tensile strength	103.0 MPa	70 MPa min
Bending strength	182.4 MPa	100 MPa min
Bending modulus	7,906 MPa	6,000 MPa min
Water absorption	0.15%	1.0% max
Lap shear strength	11.03 MPa	7.0 MPa min

FRP vs Mild Steel Tanks

Point	FRP tank	Mild steel tank
Rust	Does not rust	Rusts unless coated, and the coating must be kept up
Chemical resistance	Resin chosen for the chemical	Needs a lining for most chemicals
Weight	Light, easier to lift and support	Heavy
Joints	Seamless round bodies	Welded seams

Standards, Certifications and Quality Control

All tanks are designed to BS 4994 / BS EN 13121, and filament wound round tanks also to ASTM D3299. Engineering calculations are prepared by our fibreglass engineer and provided on request.

Every tank is checked before delivery:

• Barcol hardness test: confirms the resin has cured properly.
• Thickness check: confirms the wall is built to the design thickness.
• Leak test: confirms the tank holds liquid without weeping or leaking.

Mui Fatt Marketing Sdn Bhd and Y.T. Fibreglass Industries Sdn Bhd hold ISO 9001:2015 certification for the manufacturing of advance composite and industrial products. Certificate copies are available on request from our certificate page →.

Installation Requirements

1. Prepare a level concrete plinth at least 250 mm (10 in) above ground, free of stones and debris. Every tank, or its stand, must sit on a plinth.
2. Lift the tank only when empty, with slings on the lifting lugs. Never lift by pipes or fittings.
3. Set the tank or its support stand on the plinth.
4. Support every connecting pipe and valve on its own steel or concrete footing.
5. Fit the nozzles without overtightening, using rubber or plastic washers and no putty.

Care and Handling

• Keep the tank away from heaters, light bulbs and other heat sources.
• Fence the area so the tank is not struck by hammers, spanners or sharp tools.
• Do not knock the nozzles or hang weight from them.

How We Design and Quote Your Tank

1. Send us your requirement. A drawing is best, together with what the tank will store.
2. We check the design and choose the resin. If you have no drawing, we propose a standard design.
3. We send a quotation. Engineering calculations by our fibreglass engineer are available on request.
4. You approve the drawing. Production starts only after you approve the general arrangement drawing.
5. We build and check the tank. Typically 7 to 14 working days, plus about 5 working days for vinyl ester resin. Every tank gets a Barcol hardness test, a thickness check and a leak test.
6. We deliver. Across Peninsular Malaysia, and to Sabah and Sarawak through a freight agent.

What We Need for a Quote

• The chemical or liquid, and its concentration
• Operating temperature
• Your drawing, or the volume and sizes you need
• Open top or closed, and any cover, ladder or railing
• Nozzle sizes and positions
• Indoor or outdoor installation
• Support type: concrete plinth or stand
• Delivery site

Industrial Effluent Projects in Malaysia

Under the Environmental Quality (Industrial Effluent) Regulations 2009, an industrial effluent treatment system must be designed by a professional engineer. In these projects we build the tanks to the consultant's design and drawings, and supply the tank drawing and, on request, the calculation for the project file.

How Long Does an FRP Chemical Tank Last?

Our FRP chemical tanks typically give around 10 years of service. The actual life depends on the chemical, its concentration and temperature, the corrosion barrier and how the tank is maintained. Mild liquids such as treated wastewater are easy on the tank, while strong acids and hot liquids shorten its life. Choosing the right resin and a thicker corrosion barrier, keeping within the working temperature and inspecting the tank regularly all help it last longer.

Repair and Relining

Repair and relining of old FRP tanks is a common job for us. A worn inner surface can be relined with a new corrosion barrier, and local damage can be repaired, which is often faster and cheaper than replacing the tank. Send us photos of the tank and tell us what it stores.

Chemicals We Do Not Accept

FRP is not suitable for every chemical. We decline some very concentrated acids. Tell us the chemical, its concentration and its temperature, and we will confirm whether FRP is the right material before we quote.

Technical Expertise and Attribution

Technical content on this page is by Danny Ng Shin Lai, Director & Lead Composite Technical Specialist, Mui Fatt Marketing Sdn Bhd, and the Mui Fatt technical team. Danny Ng studied Materials Science and Engineering at UC Berkeley and oversees composite fabrication, resin selection and engineering design for Mui Fatt FRP products.

Frequently Asked Questions

What is an FRP chemical and wastewater treatment tank?

It is a fibreglass reinforced plastic tank built to hold water treatment chemicals, wastewater and sludge, with the resin matched to the liquid it will hold.

What is the difference between FRP and GRP tanks?

There is no difference. FRP (fibreglass reinforced plastic) and GRP (glass reinforced plastic) are two names for the same material.

What sizes are available?

Round tanks are 1 m to 3 m in diameter, with 4 m subject to road access. Square and rectangular tanks are 1 m to 4 m wide, rectangular tanks up to 8 m long, and heights stay under 4 m for road transport.

What is a PAC chemical holding tank?

It is a tank that stores PAC (polyaluminium chloride) coagulant for dosing in water and wastewater treatment. We make it as a round conical-base tank or a rectangular tank with partition.

Which resin should I choose?

GP suits water and mild liquids, ISO gives good chemical resistance, and vinyl ester is for severe corrosion such as strong acids and alkalis. Tell us the chemical, its concentration and its temperature, and we will recommend one.

Which design standard do you follow?

All tanks are designed to BS 4994 / BS EN 13121, and filament wound round tanks also to ASTM D3299. Engineering calculations by our fibreglass engineer are provided on request.

Do I get a drawing to approve?

Yes. We send a general arrangement drawing for your approval, and production starts only after you approve it.

What do you need from me for a quote?

Your drawing, or the sizes you need, together with the chemical, its concentration and its temperature. Nozzle positions, indoor or outdoor use and the support type help us quote accurately.

What checks do you do before delivery?

Every tank gets a Barcol hardness test, a thickness check and a leak test before it leaves the factory.

Which resin brands do you use?

We use resin from established makers such as AOC and Eternal. The resin maker's chemical resistance data can be supplied with your quote.

Can the tank be used outdoors?

Yes. Outdoor tanks are finished with gelcoat and a surface veil on the outside to protect them from sunlight and weather.

What flanges are used on the nozzles?

We suggest standard off-the-shelf HDPE flanges. FRP flanges are more expensive and can be supplied on request.

Can I add a cover, ladder or railing?

Yes. A cover is optional, and fiberglass ladders and railings can be made to suit the tank.

Can I see the liquid level in the tank?

Yes. A round flat-base tank can have a semi-transparent strip down the side, or a transparent level tube, so the liquid level can be seen from outside.

Does the tank need a concrete plinth?

Yes. Every tank, or its support stand, must sit on a level concrete plinth at least 250 mm above ground.

What is the warranty?

The standard warranty is 1 year. An extended warranty can be requested.

What is the lead time?

Typically 7 to 14 working days, subject to the production schedule. Vinyl ester tanks need about 5 more working days to order the resin.

How long does an FRP chemical tank last?

Typically around 10 years, depending on the chemical, its concentration and temperature, the corrosion barrier and maintenance.

Do you repair or reline old FRP tanks?

Yes. Repair and relining of old FRP tanks is a common job for us. Send us photos of the tank and tell us what it stores.

Do you deliver outside Peninsular Malaysia?

Yes. We deliver across Peninsular Malaysia, and to Sabah and Sarawak through a freight agent.

How much does an FRP chemical or wastewater tank cost?

Every tank is built to order, so the price depends on size, shape, resin and support. Send us your drawing or sizes for a quotation.

Request a Quote

Send us your tank drawing or sizes, what the tank will hold, and your delivery site. We will recommend the resin, send you a quotation and, once you order, a drawing for your approval.

Mui Fatt Marketing Sdn Bhd
Lot 11793, Jalan Pengkalan Nelayan, Telok Gong, 42000 Port Klang, Selangor, Malaysia
Tel: +603-3134 3888
Email: sales@muifatt.com.my

Full catalogue: Download the FRP Chemical and Wastewater Treatment Tanks catalogue from our E-Catalogue page →

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