Did the idiot thing - nail through heating pipe... straight through the other side. Have cut the pipe either side of the hole and used push fit suitable for heating and hot water pipes, to rejoin the two pieces of pipes... at first it leaked straight off so removed and re filed, made sure ends of pipe good and then wrapped in ptfe tape to make a snugger fit... refitted push fit connector... Refilled full heating system, joint is bone dry. Turned heating on so pipes fully hot. Still bone dry. 24 hrs on, still bone dry. Scared to put floor board down again as then I can’t constantly check it’s still bone dry every 4 seconds of the day - lol. Can I presume that if it was going to leak then it would have done so by now??! So worried to put floor back down and carpet etc and then not know if for some reason it’s sneaked open again?!?! Would covering the full thing in plumbers putty be a good back up plan? Finally - with the floor board laid back on top, it’s resting on the now bigger pipe... will this be a problem/put pressure on the new joint?! Thank you in advance from one seriously paranoid diy-er!!