The Rod: the rod of a conventional duct rodder is typically composed of two main part: the fiberglass inner core and polypropylene sheath. The inner core is constructed from fiberglass filaments which are impregnated with liquefied resin. These are then pultruded into rods and covered with very durable and scratch resistant PP sheath. The other type called traceable duct rodder has three parts, with the same two parts as the conventional type but also includes an inner core inserted with copper wire. This is what gives an excellent traceable performance.
The Frame: this part is usually very durable and stable as it’s made of galvanised reinforce steel pipe. Like the rod, it also comes in different types. Generally, portable duct rodders have vertical handle that has smaller diameter and lighter, making it convenient to carry around. On the other hand, a wheeled duct rodder is heavier and has larger diameter so it has an oblique handle for easy pushing and pulling around.
The Wheels: as mentioned, heavy weight and larger conduit rodders come in wheels for easier transportation and operation. However, in some cases, there are also portable duct rodders that are wheeled. The wheels of a duct rodder can either be made from nylon which is economical, or from rubber that offers better abrasion resistance.
When it comes to choosing the most suitable rodder for the task, there are three important factors to consider. These include the size of the conduit, the distance of the rod to be pushed and the number and tightness of bend in the duct. Only determining these things beforehand will give you the best tool for the job.