Are you a do it yourself plumber looking for the best deals on supplies? Look no further than our directory. Whether you are installing a new toilet, or simply cleaning out some drains, there will be the right fit for you on this list. Every Long Island plumbing supply company listed here has been extensively reviewed and has received a rating of 3 stars or higher. Don't waste time online sorting through negative reviews when we've done the work for you. Here you will find the best plumbing supply companies on all of Long Island.