Click or scroll to zoom Tap or pinch to zoom SeaFlo 51 Series 1/2" NPT M & F Inline Filter Diaphragm Pumps by ConFit Australia Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $20.06 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 51S01 Filter - 1/2 MNPT 51S01 Fitting Suitable for 33/34/42/44/51/54 Series Diaphragm Pumps.