How can homeowners conserve water? Stay on top of the process with expert guidance and fixed fees. Boiler on the blink? think help-link! Cctv drain survey - get your free quote. When the tank is empty, remove the discharge pipe from the t&p (temperature & pressure) relief valve disconnect the water supply lines if you must cut them, leave them as long as possible have someone help you remove the old tank with a hand truck. Our drains are something.