PVC pipe leak

Hi,

 I am hoping someone can offer some advice. I am having a bit of a water leaking issue and I think it is coming from my shower drain.  I had to cut out the drywall and remove the insulation in the ceiling of my garage in the area below the PVC pipes because of water damage.  The only time water runs down the outside of the pipe is when the shower is on and someone is in it.  There is a 2" ( i believe) coming down from the drain and is joined or connected to the 3" main drain line.  The water seems to be coming from the connection point, but I can't quite see it.  How do they connect and could it be leaking from that point? And what should I do to fix the problem: do I go from the top and replace the shower drain or work from the bottom?  Any help is appreciated as I am a new homeowner and a home repair DIYer in training.

Thanks,

 Casey

looks like you may have a problem with a flexing floor at the drain. watch this video and see if it helps

you apply the solution. http://www.wonderhowto.com/how-to-troubleshoot-leaky-shower-with-old-house-191689/view/

Thanks kodiakbear for the video.  I wound up doing some new caulking where the tile meets the shower pan and used plumbers putty around the shower hand shield (sconce, i think).  I also got a test plug so I can test the drain.  

I think you should go for leak detection services because finding leakage is not easy and it will take a considerable amount of time.So it is better to call a leak detection service.They can easily solve your problem and repair your pipes.Leakage may damage  your property .So give them a call as soon as possible.

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Leak Detection Plumbing UK

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