JAS Calc is an accurate design software. It is designed to analyse rainwater drainage systems for system balancing. It has been used for 35 years and has been installed in more than 35,000 systems worldwide.

JAS Calc software is used to balance the flow and pipe size in a siphonic system based on Bernoulli’s and Colebrook-White’s equation.

Bernoulli’s equation

Colebrook white equation