Sizing House connection for high rise buildings

[waseem19]

All,

How would you size the house connection for a high rise building, I know that no body put these in water distribution models so how do you size it ?

I thought about assuming a fixed velocity "say 0.5m/s" and use the peak demand for each building to come up with a reasonable size. normally this would be in the range of 0.5in or 3/4in , If I'm going to use this method I explained I will have 2in and maybe 100mm pipe. I'm not really convinced of assuming a fixed velocity but if it isn’t right then how would you size it ?

I'm also worried if I use too big house connections at the plots close to the source then very high velocities will be generated in them.

The source is a pumping station and I’m pumping to 1 day storage under ground tank in each building.

Regards

 

[sokos]

In the projects which I have worked on, we usually use 32mm for single lots, 64mm for several lots, 64mm for pubic lots (school,..). I think that 80mm is more than enough.
You can check how much flow you can get through a 80mm pipe, with max. headloss gradient 15m/km, max. velocity 1 m/sec; then compare it with the required flow to fill your storage tank.