Chemical water treatment in Malaysia since 1996
Treat the Water
Cut the OPEX
Keeping cooling towers, chillers and boilers running at their best for Malaysia's most demanding facilities
Book a site survey Explore services COOLING TOWER
01 TREAT · DOSING SKID
02 FILTER · SIDE-STREAM
CHILLER · CONDENSER
03 OPTIMISE · BMS + ML
35
Br
Bromine
Oxidising biocide
15
P
Phosphorus
Scale inhibitor
42
Mo
Molybdenum
Corrosion inhibitor
R
NH₂
Amine
Corrosion inhibitor
FIG. 01 — Complete water solution · treat, filter, optimise
pH 7.8–8.6
Cond. ≤ 2,000 µS/cm
30
Years of proven experience
257+
Active accounts
30+
Certified in-house technicians
5
Industries served
01 — Complete water solutions
Treat, filter, optimise — all under one roof.
Oasis combines proven treatment chemistry with side-stream filtration, then layers on our own engineering and software to automate the entire loop.
01 / 03
Treat
Chemical
Treatment chemistry for scale, corrosion and microbiological fouling control, matched to your water.
02 / 03
Filter
Side stream
Self-cleaning side-stream filtration that keeps suspended solids out of the loop.
03 / 03
Optimise
Engineering & Software
End-to-end dosing, monitoring and control that runs 24/7, built by our own engineering team.
02 — Services
Scale, corrosion and fouling quietly drain your chillers.
We treat, filter and flush them out, then help you save energy and water for good.
FIG. S1 · tower treatment
S.01
Open recirculating
Cooling tower chemical treatment
Scale, corrosion and microbiological control programmes matched to make-up water quality and cycles of concentration. Self-cleaning side-stream filtration is advisable to keep suspended solids down.
Inhibitors · Oxidising & non-oxidising biocides · Side-stream filtration
Get my tower water reviewed → FIG. S2 · bleed-off control
S.02
Automation
Automated dosing systems
Supply, installation and calibration of automated conductivity-based bleed-off controllers that run the bleed-off valve and metering pumps, with chemical tanks.
Conductivity-based bleed-off control
Automate my bleed-off → FIG. S3 · closed loop
S.03
Closed loop
Chilled water treatment
Cetamine® Programmes for corrosion inhibition, microbial control and routine monitoring for closed chilled water loops, with occasional flushing.
Cetamine® Programmes · Microbial control · Flushing
Protect my chilled water loop → FIG. S4 · tube brushing
S.04
Mechanical
Chiller tube flushing
Mechanical brushing and chemical descaling of condenser and evaporator tubes to restore heat transfer and approach temperature.
Brush & chemical descale
Book a tube flushing → FIG. S5 · consumption
S.05
Advanced technology
Energy & Water Saving Programmes
Advanced technology programmes designed to reduce energy and water consumption while maintaining optimal system performance.
Software and ML run on top of your BMS
See what I could save → Equipment · FIG. 02
Side-stream filtration
Self-cleaning screen filters remove suspended solids from a portion of recirculating water, reducing fouling in condenser tubes and improving biocide performance.
Flow
5–10% of recirculation rate
Cleaning
Automatic, differential-pressure triggered
Integration
Linked to dosing controller
Ask about filtration 
FIG. 02 · side-stream filter
cutaway · screen + flush valve
03 — Industries served
Different loads, different failure costs.
I.01
Semiconductor fabs
Process cooling with tight temperature tolerance and zero tolerance for unplanned downtime.
Process cooling towers · PCW loops
I.02
Hospitality
Hotels and resorts running continuous chiller plant with Legionella risk near guest areas.
Rooftop towers · Chilled water
I.03
Healthcare
Hospitals and clinics requiring documented microbiological control and audit-ready records.
Cooling towers · Closed loops
I.04
Commercial offices
Multi-tenant buildings where energy efficiency of the central plant drives operating cost.
Central chiller plant · AHU loops
I.05
Manufacturing plants
Process and comfort cooling exposed to dust, process contamination and variable loads.
Process towers · Heat exchangers
I.06
District cooling
Central plants supplying chilled water to multiple buildings through large distribution networks.
District cooling towers · Chilled water networks
04 — Process
Root cause first. Then the programme.
Cooling tower louvres
Hot water basin
Centrifugal chiller plant
Fouled fill media
Tower interior
Cooling tower rain zone
Spray distribution
Cooling tower cells
Mini cooling tower
Chiller plant survey
Chemical dosing system
Cooling tower louvres
Hot water basin
Centrifugal chiller plant
Fouled fill media
Tower interior
Cooling tower rain zone
Spray distribution
Cooling tower cells
Mini cooling tower
Chiller plant survey
Chemical dosing system
01
On-site assessment
Inspection of towers, condensers and dosing equipment under your actual operating conditions.
Output: Site survey report
02
Lab testing and corrective action
Make-up and system water analysed to identify the root cause. Targeted corrective actions and dosing setup follow.
Output: Site-specific treatment specification
03
Oasis WaterCare Programme
Monitoring, control and optimisation to maintain long-term system reliability, with results trended against control limits.
Output: Monthly service report
05 — Ask an engineer
Send us what you're seeing.
FIG. A · approach temperature
01
Approach temperature creeping up?
Your chiller is working harder than it should and it's usually tube fouling or scale. Send us your evaporator and condenser readings (water in/out temps and refrigerant saturation temps) and we'll tell you where the heat transfer is being lost.
Send my chiller readings →
FIG. B · tube cross-section
02
White crust on your fills or tubes?
Scale builds up quietly and cuts efficiency long before anything breaks. Snap a photo of your cooling tower fills, basin or condenser tubes and we'll identify the scale type and how to remove it safely.
Send a scale photo →
FIG. C · pipe wall
03
Rust stains or pitting?
Brown water, flaking pipes or rust in the tower basin can mean corrosion is eating into your system. Take a clear photo of the inside of your cooling tower or the affected pipework and we'll assess how serious it is.
Send a corrosion photo →
FIG. D · fill pack
04
Slime, algae or fouling in your tower?
Biological growth clogs fills, speeds up corrosion and raises Legionella risk. Send us a photo or your latest water test report and we'll check whether your current biocide programme is working.
Send my water report →
FIG. E · monthly kWh
05
Electricity bill keeps going up?
Dirty condensers and poorly treated water can quietly raise chiller power use by 10–30%. Share your last few TNB bills and your chiller log sheets and we'll help you see how much is due to water treatment.
Analyse my bill →
FIG. F · service report
06
Is your current programme really working?
Can't make sense of your current service report? Send it over and we'll explain what the numbers mean and whether anything needs attention.
Get a second opinion →
06 — Case studies
Measured before and after.
All case studies Semiconductor fab
Tube flushing · 3 chillers
Condenser approach temperature restored on LT and MT chillers
Two low-temperature and one medium-temperature chiller were cleaned and put on a treatment programme. Approach temperature was logged per chiller before and after.
Read the case study →
3.6 → 0.5 °C
Average condenser approach, before → after
85.6%
Average improvement across 3 chillers
Hotel
Cooling tower programme
Cooling tower programme and bleed-off automation
Manual blowdown replaced with conductivity-controlled bleed-off and a revised inhibitor programme.
Read the case study →
3.2 → 8
Cycles of concentration
28%
Reduction in make-up water
Hospital
Microbiological control
Microbiological control for rooftop cooling towers
Dual-biocide programme with monthly dip-slide and quarterly laboratory Legionella testing.
Read the case study →
0
Positive Legionella samples, 24 months
< 10³
CFU/mL total bacteria, all visits
ISO 14001:2015 certified
Committed to Responsible, Compliant Operations
We are certified to BS EN ISO 14001:2015 by NQA, demonstrating that we maintain a structured Environmental Management System for our cooling-tower chemical supply works. Our processes focus on safe handling, spill prevention, proper waste management and ongoing monitoring so you can work with us confidently and compliantly.
© 2026 Oasis Engineering & Supplies Sdn Bhd · ISO 14001:2015
