I need two 12 inch end caps for a pvc pipe.  It doesn't matter how
much PSI it is rated for.  I'm looking for a store where I can
purchase it in Washington DC area, or online store that would ship
them.  My budget is $50.  Most local hardware stores do not carry pvc
products of such large diameter.  I'm looking for store contact
info/website and price.

For clarity, this item is listed at
http://www.irrigationdistributors.com/Page20.htm for $29.90 each.

Will also welcome other suggestions on how to seal the ends of a pvc
pipe.  The pipe is used for storage.

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Clarification of Question by alekb-ga on 07 Oct 2003 12:00 PDT

Just to clarify, the pvc pipe is 12" diameter, and I need end caps for
it to seal the ends.

if the pipe is not too heavy/cumbersome, stand it on end in a biscuit
tin type lid and use epoxy or silcon to seal around the edge.

an easy way would be to get a stainless steel clamp (or several put
together) and use gasket material or tin cut with snips on the outside
diameter, tighten clamp on the outside. cost= 5 to 10 dollars.

Pipe this size is used in water and sewage systems. The exact size of
the cap will depend not only on  the nominal diameter but also on the
pressure rating of the pipe. The caps will require using proper sized
gaskets to be secure. You will also have to cut a chamfer  on the end
of the pipe  in order to fit the cap. These usually also use special
pipe lubricants to ease the fit of the cap onto the pipe. In other
words not an easy job for someone inexperienced in working with this
material and some special tools may be required.

Depending on the wall thickness you could simply cut a circle out of
plywood and use wood screws to hold it on the end of the pipe. You
would drive the screw through the plywood into the pipe. (length of
the screw would be parallel to the length of the pipe.)

If the pipe is too thin to hole a screw or you want something
sturdier, you can cut a 2x4 to fit across the end of the pipe and
screw this into the end walls. (Length of the screw perpendicular to
the length of the pipe). You could then screw the plywood into this
2x4.

For maximum strength using this sort of idea get a 2x12 and cut a
circular piece equal to the inside diameter of the pipe and insert it
into the pipe. Screw this into the pipe by driving screws
perpendicular to the length of the pipe around the circumference.

Most of these would be done with scrap pieces of lumber, you can ask
around a couple of construction sites or lumber yards for this and it
would usually be free.