This Bulkhead Fitting Kit is for "adding" an additional Valve port where there are not predrilled holes. This 1.5" accessory kit includes a complete SS bulkhead fitting valve installation, Tassilini sample valve. It combines the BH3, BV3, SV3 units. This kit fits all "Older Generation" Eco and Dexter Maturation and Heavyweight tanks plus the Apollo Fermentor. It may be installed at any location on the tank and does not require molded in inserts.