Admittedly I haven't used that much 3 inch irrigation tubing. I have a
couple of lengths of 3 inch diameter (72 mil thick) stuff I bought from
Rain-for-Rent a few years ago and it was almost a perfect fit for 3 inch
ABS, but I wouldn't be surprised if other stuff wasn't as consistent.
Good to know about the well casing material for 4 inch irrigation
tubing, and I'll have to check that out. Lots of wells get drilled out
here in the boonies of southern Arizona. I still have about 70 feet of
the 4 inch irrigation tubing that I was never able to find a decent
sleeve for ... except for a very short piece of steel pipe I stumbled
across at a scrap metal place. I welded eye bolts to it for guy
attachments.
Agreed on the sharp edges on the countersunk holes for the toilet
flange. I just used a rat tail file to round them off.
73,
Dave AB7E
Rick Karlquist wrote:
> David Gilbert wrote:
>
>> 3 inch ABS fits very nicely over 3 inch irrigation tubing, and Home
>> Depot sells black "plastic" toilet flanges that will fit over the 3 inch
>> ABS. The toilet flanges are super tough and already have four holes in
>> them for fastening to a floor. Glue the toilet flange to a few inches
>> of the 3 inch ABS and then slide the assembly over the irrigation
>> tubing. Drill three or four holes through both the ABS and the
>> irrigation tubing for self tapping screws to secure the sleeve in place.
>>
>> In my opinion, one set of guys about 2/3 to 3/4 of the way up each
>> vertical should be sufficient for everything short of a hurricane or
>> tornado.
>>
>> 73,
>> Dave AB7E
>>
>
> I've done this before, however, there are a few issues. 3 inch ABS
> or PVC pipe may or may not fit "nicely" over 3 inch irrigation tubing.
> It depends on the tolerances of the pipe. I have seen pipe that would
> not slip over the irrigation tubing at all, even with a hammer. I have
> also seen pipe that is loose as a goose. This is why I slit the pipe
> and then clamp it with a hose clamp. The toilet flange has 4 holes,
> however they are somewhat offset from 90 degrees spacing, but it will
> sort of work. Also, the holes are made for countersunk screws and have
> sharp inside edges that are hard on the rope.
>
> BTW, on 4 inch irrigation tubing, I have seen exactly 1 piece of 4 inch
> PVC or ABS pipe that would slip over the irrigation tubing. Every other
> schedule 40 pipe I've tried has been too tight. You need to use
> 4 inch class 200 well casing. That will easily slip over 4 inch
> irrigation tubing because it is designed to slip over 4 inch pumps.
>
> Rick N6RK
>
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