![0.5" Coupler](http://shop.neptunesystems.com/cdn/shop/products/12-adapter_{width}x.jpg?v=1553378488)
0.5" Coupler
178-00011Replacement 0.5" Coupler
Replacement Coupler for the FS-50. Sold each, not in pairs.
0.5" BSPP > 0.5" PCV Slip Coupler 
 
Replacement Coupler for the FS-50. Sold each, not in pairs.
0.5" BSPP > 0.5" PCV Slip Coupler