D3 branes stretching between webs of (p,q) 5branes provide an interesting class of 3d N=2 theories. For generis pq-webs however the Iow energy field theory is not known. We use 3d mirror symmetry and Type 1113 S-duality to construct Abelian gauge theories corresponding to D3 branes ending on both sides of a pq-web made of many coincident NS5's intersectìng one D5. These theories contain chiral manopole operators in the superpotential and enjoy a non trivial pattern of global symmetry enhancements. In the special case of the pq-web with one D5 and one NS5, the 3d low energy SCFT admits three dual formulations. This triality can be applied locally inside bigger quiver gauge theories. We prove our statements using partial mirror symmetry 'a la Kapustin-Strassler, showing the equality of the S3b partition functions and studying the quantum chiral rings

DATA: 06-07-2016