Use as a termination on vertical systems. Category I and II appliances require a raincap with wind protection. Vent systems for positive pressure appliances may omit the raincap if there are other provisions for draining rainwater from the system. The raincap may also be used as a horizontal termination. Each raincap includes a joint locking strap as well as a storm collar. Call Heat-fab to inquire about larger diameters.