How does one clean the waterfeed copper pipes that go to the polishing heads, some clog after a few a few minutes of use
some one please advise

If you're clogging the pipes...especially after only a couple minutes...then your water is way too dirty. I'm surprised that you can even get a polished finish with water that dirty. Are you filtering the water at all before sending it to the machine?

Again, Nick McDonald over at Marmo can probably help you out..... 248.853.9000...I agree with Brian though, thats not a typical problem and it sounds like you need to consider some water filtration at minimum...you can find some cheap solutions for this used on the market right now. Good luck!

a couple used ones located here fyi :

http://www.usedstoneequipment.com/c...?catid=391