How can we make our services more useful for you? Your installer may offer to do this for you. You can either replace the plug or you can mortar a piece of tile over the eye if you need to open the rodding eye again, the tile will knock off easily with a crowbar and hammer. If you were to finance your new gas boiler over a period of - years, it could pay for itself in energy savings including the interest! More efficiency: we will provide you.