On Jul 21, 9:28�am, "john"
wrote:
older homes have clay pipe, cast iron very rare. newer homes have
plastic pipe. clay pipe would drill pretty easy

Thats interesting. �Thought I read somewhere that they never use plastic
under the house so that it could support the weight of the house and not
crack. �Or something like that.

But like I said, my levels are down to 3.5 now and still dropping. �Im so
pleased right now. � Thanks Haller and others for the help.

My dad brought up a good point on the phone last night...saying I should buy
a plastic elbow connection as well so that the pipes will bend upwards when
installed. � Im going to home depot soon...not sure if i'll do the drilling
or not. � if so, i'll be careful.

you want the pipe to slope downward away from home.... since radon is
heavier than air

I would do a second one....... just to be on the safe side.

this is called passive radon control. no fans no power and nothing to
maintain