Hello!

I am wondering if anyone can give me some advice on how I can fix my water problem at home. For the past year or so I have absolutaly no hot water pressure in my kitchen sink and or some other areas of the house, bathroom, shower etc..

I have had a few plumers come by and they tell me I have to change all my pipes in the home which can cost me a lot.

My WH is OK per some of their advice?

Please let me know or give any advice?

dip tube (http://www.masterplumber.net/Electricwh/dip_tube.htm)
Thehomeinspector.com/Clients/DipTube.html
Do a bit of research on dip tube and dip tube failure. It is likely your dip tube has failed and the areators are simply clogged.
It appears you called plumbers that have big ads in the yellow pages and they are trying to sell work.