Each tap will pick off fuel at a high or low level in the tank according to whether you have "on" or "res' respectively selected on the tap. You should run pipes from each to a "T" or "V" piece and then to the carb. If you want to insert a filter in the system you will probably find there is not much room between T-piece and carb. If so, get a pair of filters and place them close to the taps. They are cheap to buy. You can buy t-pieces from BSR-Aerotech and the like. Also try aquarium suppliers - they sell this stuff. Buy a couple as the are easy to break, especially when cold.