Please drop us a line below and we'll get in touch with you shortly! This time, i was told the pipes could be connected to the new boiler, but northern gas heating “would not be responsible for any leaks”. Didn't unblock sink at all,if anything is was more blocked after applications, even when left for hours! Inserters can place (fuel) items into boilers, but can also remove items from them see. I had appliance guys over to.