"EXT" wrote in message
anews.com...

"Harry K" wrote in message
oups.com...
On Aug 27, 6:55 pm, "Bill Stock" wrote:
I want to use a SonoTube as an access port for an underground valve. The
valve will be about 4' under ground. I thought if I painted the ST and
wrapped it in plastic it would hold up much better. It won't last a
thousand
years, but it should meet my needs. I'll insulate the Tube to prevent
freezing.

Any ideas on the best way to mummify my Tube?

As others have suggested, use plastic pipe. I used ABS though as it
has a much thicker wall and I think it is more sun resistant. It has
been in place now for around 20 years. A 5 or 6 ft section of even
large bore diameter will not be a high cost item.

Harry K
If the OP lives near a housing development that is just starting there are
often pieces of plastic water or sewer main material laying around for the
taking, offcuts from the installation process. Makes good materials for
your type of use.
Having grown up in the business, I gotta say it- ASK before you take.
Quite often what looks like scrap, isn't, and it is a major pain in the ass
to the crew (or the site go-fer, which was my job as a kid), to go round up
replacements for stuff that grew legs.

But as far as OP is concerned- a short piece of culvert pipe of correct
diameter, plastic or steel or concrete, makes a good access tube. Local
concrete products place has or can get them, in all flavors. (they don't
just carry stuff MADE of concrete, they carry whatever flatwork guys need.)

Note that you either need to pin the peices together, or have some sort of
slip-fit arrangement, to ensure things don't move around due to frost heave,
or the thing doesn't fill with mud in rainy season. Crushing from frost
heave or hydrostatic pressure would worry me with sonotube, even
waterproofed.

aem sends...