I have been using a interpump 202 for the last week or so and have been trying out using from a buffer tank( wheelie bin) and straight from the mains. Regardless of if i use a filter or run water straight through the 3/4 inch hose the pump does not run anywhere near its max capability as it is not getting nearly enough water. Now it is still powerful and cleans well but when its being used straight from the mains its a different machine with excellent pressure and amazing cleaning speeds. Now apparently this should not be the case as mains pressure per minute should not be enough to run the machine at full capacity. It may well not be running at full tilt but its a hell of a lot closer to it than using a single 3/4 inch hose with NON tapered filter.Now it may be different if i am pulling water from the bottom of a tank as the water pressure will be superior to the pump pulling from the top (as in what you do when using a wheelie bin). After trying this various times as different jobs its of my opinion that a single water intake will reduce the life of this pump as its not getting nearly enough water. I will be running this off the mains at all jobs until i get a dual intake to try and compare. Can i ask any other 21lpm users to give me there experience and indeed if they have not tried it from the mains to try it and see the difference . I have seen the video regarding the filter on a 21lpm which was tapered and therefore thats why the company was using dual intake. My filter was not tapered and i did try it as i said with no filter and water pressure was the same. I feel there may be a need to have a dual intake to get the best out the pump but would love to hear how others are getting on ?.