Pour the baking soda into the drain and let it sit for a few minutes, then pour the vinegar in with a cup of hot (not boiling) water. Installation • repair – all makes and models • maintenance. For appointments, call 401-351-2750. Months free cover when you buy heating protect*. We offer a wide range of maintenance with high quality work for the right price having 15 years of experience including interiors, bathrooms and kitchens refurbishment. Our emergency plumbers and gas fitters are equipped.