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Can I replace a Hoffmann 40 with a Hoffmann 41 if I use an elbow

Can I use a Hoffmann 40 with a 41 if I use an elbow 


  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    I'm pretty sure the 41 is a faster vent, though I wouldn't describe either one as fast.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24