Be entered into our monthly prize draw when you sign up for newsletters! Our london boiler engineers are at hand hours a day, days a week look at our gas and central heating services page for more information. Is it safe to use a plunger or pressurized drain opener after adding drain out bathroom to my drain? From a boiler installation in gloucester to a replacement tap in tewkesbury we can offer a prompt and professional service. Stacy, the bathroom project looks.