Jun 10, 2016 - Installing a Main Drain. Materials needed: One main drain for vinyl pools. I. Dig the trench. II. Prepare the main drain. III. Set the main drain. IV. Continue with the piping. V. Plumb in the valve. VI. Connect the line to the pump and skimmer. VII. Cutting in the main drain (Yikes!) Apr 24, 2016 - Hello, I am not sure if swimming pool questions are answered but here we go. I have a pool with 2 main drains and then there is pipe that . do it yourself. Cancel. Search Replacing the main drain in your pool can be complex and it can sometimes be difficult. It can be . You will want to replace your old main drain cover with a version which meets new government guidelines. Nov 3, 2010 - An inground swimming pool's main drain is located in the deep end of the pool. A main drain circulates the pool's water by pulling water off the . Feb 24, 2011 - Professional pool service companies can do this for you, but if you don't mind getting wet; you can do it yourself. A pool drain cover should be . Mar 8, 2015 - When the pool main drains are correctly positioned in each hole, the top of the drains should be at the finish grade, and there should be 4″ to . Mar 23, 2012 - Main drains can also be difficult to winterize properly in an above ground pool, which of course only matters if you live somewhere that has hard . During normal operation, water flows to the filtration system through the skimmers around perimeter surface of the pool as well as the main drains at the bottom.