Since 1896, Peterson have featured House Pipes in their portfolio. The first iterations were designated by an "O" stamp for "oversized" and presented three shapes, "O1," "O2," and "O3." Over time, however, those shapes were discontinued, replaced by the House Pipe series. Defined by only two shapes — a straight and a bent Billiard — the House Pipe line offers Peterson's largest designs in regards to chamber depth and in-hand substance. The exaggerated size exemplifies the Irish marque's signature robust shaping style, taking that muscularity to the extreme.