Good morning pool guy….What is the easiest way to install several 3 or 4 inch 
drains in an existing pool deck to get rid of water that puddles? is it as simple boring a hole with a concrete cutter into the stone beneath the concrete and putting a cover on it? we are not talking much volume…..what products would you use?…….thanks 
Photos would help if you have any you could send over for your drainage question. The first thing we always do is add saw cuts to a patio where there is water puddling. That helps draw it away so it can disperse and drain. Feel free to send in images that would help us give you some better advice!