Radon mitigation systems: is your home safe? Are the most common type of boiler in uk homes – and it’s no wonder why they. Plumbing or a blocked drainage emergency - make us your first port of call! Broken or blocked derby sewers or sewage pipes. When it comes to plumbing, heating & cooling service or installation in your home or at your business, h jack's plumbing & heating’s team of trained and certified professionals can help.