hi.. we have just moved into a house with a lovely rayburn 355m solid fuel stove which heats the rads and water. we are due to have a condeser boiler put in soon for convieniance and would like to use the rayburn just as a cooker. have read about putting sand in the boiler once it is disconnected??? also to definatley not cap off the old pipe outlets...apparently agas are not allowed to run if they have a back boiler and have been disconnected from heating and water. is it the same for rayburns??