Hi, Have recently bought a cast iron radiator that was supposed to have been pressure tested. But when it has been installed a small pit mark started blowing water out. It is going to be a bit of a hassle to sort this out from where i bought it from so was wondering if there is any tried and tested method of repairing it. The thing is about 2 metres long by 2 foot high so weighs a bloody ton so don't really want to be taking it anywhere either if i can help it. Any advice would be greatly appreciated thanks.