Permafunnel is an internal funnel, which is easily installed in hand pumps in order to provide a straight water flow. It is machined from the food grade plastic UHMWPE (Ultra-high-molecular-weight polyethylene) and is fully inserted into the spout of a hand pump. The outer diameter is selected to ensure a slight interference which fits with the inside of the spout and can be installed by using a hammer or alternatively, a hydraulic press. The inner diameter is designed to prevent restriction of the water flow at the highest possible pump rates. The funnel is cut at a 45 degree angle to enable it to be fitted deep inside the outlet spout. The upper part is specifically shaped to calm and guide the water flow.
The correct size is selected to match the particular pump spout diameter and the installation is quick and simple. It can be fitted following the manufacture and prior to installation or also, into previously assembled hand pumps. It is not limited to a certain hand pump model.
Without a funnel, the chaotic water flow exiting from hand pumps results in water waste of 30% or more. Hand pumps provide access to drinking water for many millions of people in rural and developing areas. When water is pumped into containers with narrow openings (jerry cans etc.) a large percentage is spilled due to the uncontrolled water flow exiting the pump spout. This waste contributes to unsanitary water points; longer pumping times and hence queues. Sometimes external funnels are made from organic materials such as leaves, but they are usually not handled properly and fall into the muddy area around the pump, contributing to the contamination of water.
In regions where clean drinking water is a precious commodity, it is imperative to have easy-to-handle systems that can stem the chaotic flow of water. This leads to less water being wasted and the population being able to save time and money on procuring water for their needs. Additionally, an invisible funnel system will not be touched by users, further reducing the rate of infection. Geographically, the funnel can have a huge impact in all areas where hand pumps are a primary source of clean drinking water. Small local companies could produce the funnel in order to retrofit previously installed hand pumps. Thus, jobs could be created by production and retrofitting.
Diameter: Variety of external diameters to match the sizes found on installed hand pumps
Tools required: Hammer or hydraulic press
Costs: ~$10.00 per unit
Organization: Nile Center for Alternative Technology - Australia
Contact: Rowan Matthews-Frederick
Used by: Sudan