Wells, not H.G. Fargo or saddlers

[Baloo]

" 100mm Perforated Land Drainage " Google it .. for around £35 + vat per 100 mtrs
It has some thing like six rows of 1 mm slits 70 mm long every 100 mm or so along its length .
Those tubes you mention would cost around the same for 60 mtrs perhaps ?? The tubes will also be a heck of a lot heavier than the land drain .
Plus you'd have to pay for your fuel and time etc.

I'd say that you would have to drill that many holes at least 5 mm every 35 mm or so and in inch apart rows all round the pipe in diameter that you'd need to buy two quality hard working power drills to replace the current one you have in mind using ....

Also be wary of having too much fast water movement else you'll draw in dissolved / dissolving clay and clog your pipes ... that's why I came up with the idea of having a bundle of pipes actually sat well down below the water table running into a fairly big draw off point. The slower the water moves the less it will silt up.

The pipes must sit on a bed of stones as well or you will quickly suck in mud from the bottom of the trench . It is not just a case of covering the pipes in stones.

hi

l have uncovered quite a bit of the normal perforated land drain plastic pipe around the field as l have been digging and have to say l have found it as about as much use as tits on a nun really, even at a minimal depth it just squashes flat with the wieght of the earth above it and renders it useless for carring water however it may have some use if l insert either in the 8" tube or between them when they are arranged in a 4x4 block, it was the 8mm wall on the 200mm dia tube that appealed to me for its ability to carry the wieght of 10' of pebbles,stones,earth above them

test pit has now been filled back in and l will switch to a 36" bucket and cut a new slot 9m long next, 12" of 20mm gravel then the pipes and then some more 20mm gravel and then back fill the last 3' or so

Andy

 

[pidgeon chit welder]

Andy,
The perforated land drain I excavated in my land from seven feet down that had 300 mm of pea grit above around and below ..it was in perfect shape had been there for nearly 30 years ..it was only the stuff that had no pea fill around it and just soil that was flattened a lot .

Perhaps talk to a land drain laying contractor in your area or the local land drainage board .... they should have lots of info on such things and see what they say before spending too much of your dosh .

" The paving expert " has some piccies on his site of using geo tex fabric to wrap the pipe to prevent silting .. interesting and also his use of the gravel.

I've always put the gravel external to the geo tex wrapped pipe he puts it inside adjacent to the pipe.