Suziespool

Total newbie to the swimming pool experience. My new INTEX 22 x 52 has these two 'strainers' on the output side of the pump in the pool. I disassembled them and want to replace the cover with the holes with a solid cap. [I plan top angle of the flow to the side.] The cap screws on but I don't know the size of the cap I need. Home Depot was not helpful. Thanks for your anticipated help. jim