The TopTier™ Modular Brewing Stand is highly engineered and designed to safely hold a maximum of three tiers (up to 30 gal pots per tier). For safety and liability reasons, we do not recommend installing additional tiers and we do not sell additional mounting arms for this reason. However, we do offer a 10" X 10" utility shelf (50 lbs. max), pump brackets, and chiller brackets to allow you to customize your stand. In addition, we include spare mounting nuts for you to add your own accessory items to the T-slot system.
For details on those items, check the Photo Gallery Accessories tab on our web site at the link below.