Water Heaters - pls help me out with my hot-water heat system

hello all members!
I have a issue as following:
I just bought a house that was built in 1947, 3 beds, 1 floor and it has the hot -water heat system that has the pipe system be buried under the floor.:mad:. The worst thing is the pipe system that is used for heat up the kitchen be crack :(. I have tried to shut off 5 valves after the pumb but water still pour out. Here are the link of those valves' pictures:
http://i653.photobucket.com/albums/uu257/josedoan/DSC01616.jpg
http://i653.photobucket.com/albums/uu257/josedoan/DSC01615.jpg
I don't understand why there is not the valve at the last branch pipe, left side in those pics.:wall:
If there is anyone can tell me how is the pipe system be organized or the outline of pipe system in other words.
Thank you for reading my thread and I really appreciate for all the replies. God bless you all.

P.s: can anybody give me the best advice to switch or convert the pipe system to the other one such as baseboard sytem.

i dont know a lot about these systems but it seems to me the last one which does not have a valve may be the feed for the domestic hot (hot to sinks and such).

you may have to turn the water off at the boiler and bleed down the system to make the repair

Those things you think are valves are cocks, from your picture none are shut off. That brass rectangle on the top should be srtaight across the pipe, if its pointing in the same direction as the pipe it is on. The pipe without any control on it means you will probably have to shut down the whole system, sorry. :(


Edit: After looking at your pictures again it looks like you took the nuts off the valves, if so get them back on because the whole center section of the valve can come out!! :eek:

sounds like a Levittown house with the heating and a poured floor of concrete buring the copper....the worlds first attempt of radient heating 1947 technology.you need to shut the water valve on the boiler or that galvinized line coming from the left thru the union into the cir pump.that far left copper tee feed isn't valved but still on the header so it is feeding water to the other side of those brass shut-offs!even ith the circulator off the system pressure is leaking wihin the concrete and thru that un-valved left tee.shut the water feed to the boiler and drain down there.the fix to that system is to take the feed from the cir.pump and run it to new Slant-Fin mounted above the concrete floor all the way around the perimeter of the house.