How to make a bubbler?

[jerrymc777]

Does anyone know or can direct me to the correct forum on making my own bubbler?
My searches on here are not coming up with anything.

I have a bunch of white sch40 pvc, but would like to use 1~2" clear with 3/8 barbed ports.

Also I'm not understanding how the water does not flow out of the bottom of the bubbler back towards the reservoir.

Thanks!

[fartsack]

http://images.search.yahoo.com/images/view;_ylt=A0PDoX4I4lJOYiYAhVWJzbkF;_ylu=X3oDMTA3cn MybzJvBHNsawNpbWc-?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearc h%2Fimages%3Fp%3Dhho%2Bbubbler%26ei%3DUTF-8%26fr%3Dytff-%26fr2%3Dtab-web%26b%3D1%26tab%3Dorganic&w=693&h=1024&imgurl=christopherbradshaw.net%2FThe_Project_Bin%2 FHHO%2520safety%2520bubbler.jpg&rurl=http%3A%2F%2Fchristopherbradshaw.net%2FThe_Pr oject_Bin%2Fhho%2520generator.html&size=288.4+KB&name=Safety+bubbler+device&p=hho+bubbler&oid=df756b3105d62d1546763f029b5b734c&fr2=tab-web&fr=ytff-&tt=Safety+bubbler+device&b=0&ni=28&no=1&tab=organic&sigr=12319kcja&sigb=138ntavmj&sigi=122i2va0r&.crumb=DVjk4nAaVbr
Hope this helps!

[jerrymc777]

http://images.search.yahoo.com/images/view;_ylt=A0PDoX4I4lJOYiYAhVWJzbkF;_ylu=X3oDMTA3cn MybzJvBHNsawNpbWc-?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearc h%2Fimages%3Fp%3Dhho%2Bbubbler%26ei%3DUTF-8%26fr%3Dytff-%26fr2%3Dtab-web%26b%3D1%26tab%3Dorganic&w=693&h=1024&imgurl=christopherbradshaw.net%2FThe_Project_Bin%2 FHHO%2520safety%2520bubbler.jpg&rurl=http%3A%2F%2Fchristopherbradshaw.net%2FThe_Pr oject_Bin%2Fhho%2520generator.html&size=288.4+KB&name=Safety+bubbler+device&p=hho+bubbler&oid=df756b3105d62d1546763f029b5b734c&fr2=tab-web&fr=ytff-&tt=Safety+bubbler+device&b=0&ni=28&no=1&tab=organic&sigr=12319kcja&sigb=138ntavmj&sigi=122i2va0r&.crumb=DVjk4nAaVbr
Hope this helps!

Is the plastic wrap and rubber band acting as a flash port?
How can this be air-tight though?

Thanks for the link!