Hello every one,

It takes long time for the hot water to come on while we take shower especially on the second floor shower, once it is running then it is OK, but in the beginning wasting a lot of water, any suggestions please.

You have to install a hot water recirculation system:

Hot Water Recirculation Systems (http://www.toolbase.org/Technology-Inventory/Plumbing/hot-water-recirculation)

It is something that I can install it myself and how much would it cost, Thanks

My guess is that you didn't try any of the links on the website like this one:
Hot Water Circulator Recirculator Pump (http://www.redytemp.com/)

Thanks guys,

I installed the Watts instant hot water recirculating system Model # 500800 and works great, Thanks again.