Home / Aztec / DOUBLE BLOCK AND BLEED VALVE (MODEL NO. FBB-FBNNT) DOUBLE BLOCK AND BLEED VALVE (MODEL NO. FBB-FBNNT) Category: Aztec Related products DIRECTLY MOUNTED FIVE VALVE MANIFOLD 5VMT DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBNT) DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBBT) DOUBLE BLOCK VALVE, FLANGE X FLANGE (MODEL NO. DB-FBNF)