Brayden's dad Posted July 6, 2007 Share Posted July 6, 2007 Hi, I've set up two closed loop systems on my 6x2x2.5. One seems to be working ok but the other is sucking air from somewhere. There's really no point in boring everyone with confusing details of the system, suffice to say that it must be sucking air from one of the PVC joints in the pipework leading from the tank to the pump. The problem is that I can't pinpoint where it is leaking. There is no evidence of water leaking out (that would be too easy) from any of the joints but I can hear it sucking the air in as well as see the micro bubbles being produced from the discharge points. I thought I may be able to pinpoint it by listening intently to it, but I think the sound is travelling through the pipe making it hard to locate, hence my problem. Does anyone know of a way I can find from where it is leaking? I know how to find leaking gas from a positive pressure line, but this is a negative pressure line. Thankyou, Troy Link to comment Share on other sites More sharing options...
Stuart74 Posted July 7, 2007 Share Posted July 7, 2007 Wrap insulation tape around each joint until you find out which joint is leaking or Shut down the system, fill the line with water and pressurise it or shut down the system and pressurise the line with air, spray water over the joints and wait for the air bubbles Link to comment Share on other sites More sharing options...
BaZ Posted July 7, 2007 Share Posted July 7, 2007 Put an earplug in one ear and hold a length of pipe or hose, about half a metre, to your other ear. Then hold the free end of the hose or pipe near each joint and listen for the noise. This should help to amplify the sound a bit for you while also blocking out the other noises associated with the system. I'm not sure how well this works, but I've often seen mechanics use this method when trying to diagnose engine noises. Link to comment Share on other sites More sharing options...
orcy Posted July 12, 2007 Share Posted July 12, 2007 sometimes a smoking candle, or incense stick can help. just hold the smoke near the joints. if you get a change in movement, you probably have your leak. are all the joints glued? were they primed properly? hope you find it cheers Link to comment Share on other sites More sharing options...
matt_frontosa Posted July 12, 2007 Share Posted July 12, 2007 another trick plumbers use sometime use to find leaks is to spray ajax where u think it is leaking and see if there are any bubbles coming form the soap. Link to comment Share on other sites More sharing options...
obsessed1 Posted July 12, 2007 Share Posted July 12, 2007 another trick plumbers use sometime use to find leaks is to spray ajax where u think it is leaking and see if there are any bubbles coming form the soap. I would strongly advise against this! He has said that it is "sucking air" so therefore the only bubbles that form would probably be from the ajax entering the tank and killing the fish. Link to comment Share on other sites More sharing options...
Ash Posted July 12, 2007 Share Posted July 12, 2007 another trick plumbers use sometime use to find leaks is to spray ajax where u think it is leaking and see if there are any bubbles coming form the soap. I would strongly advise against this! He has said that it is "sucking air" so therefore the only bubbles that form would probably be from the ajax entering the tank and killing the fish. ya, I'd feel better about orcy's idea about the smoke from a candle/incense than soap Link to comment Share on other sites More sharing options...
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