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All products & services are priced in "US Dollars".

Those with price tags can be purchased immediately online. Those without a price tag would require you to contact us for product info, price & payment details.

Where specified, payments may also be made in "Ringgit", or in your preferred currency particularly for Memberships, eCalculations, eDrawings, eTutorials & eCourses.

Payment for Products & Services can be made by any of the following methods specified below, please choose most suitable one when you make purchase :- 


Payment via PAYPAL, is very secure, fast and easiest. You can use your own Credit or Debit Cards (Visa or Master) or transfer from your own Paypal Account to our Paypal Account. This can be made immediately from the comfort of your office/home.


Our default payment gateway is PAYPAL and default currency is US $


Payment via BANKS - Online Transfer, ATM or Deposit Cheques to our Bank Account. We have International Bank for payment in "US Dollars", and Malaysian Bank for payment in "Ringgit".

  If you wish to pay via Banks please email for details. 
3. Western Union Bank - the easiest way to pay or send money in US$. Just call up your favourite bank and ask if they handle Western Union Bank Payment. Then just let us know your preferred mode. 

If you have problems choosing payment methods, please Contact Us or email

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 Calculations & Worked Examples for Design of Drainage System.

 Drainage Calcs

 Calculations for Design of Water Reticulation System

 Water Supply

 Calculations for Design of Circular RC Water Tanks

RC Water Tanks



Authur- Philip Goh (B.Sc, MIEM, P.Eng. MICE, C.Eng) MEC Engineers, Civil & Structural Engineer HP: 016-8672189, Email: Widget: email cloaker