Drain pipe filter sock/sleeve - where to buy in Thailand?

[Bruce404]

In regard to a new retaining wall, for which improper drainage of rainfall/storm-water runoff is the most common cause of failures, I am trying to find where in Thailand one can buy the very convenient geotextile filtering "socks" or "sleeves" to protect perforated drain pipes used as part of a drainage system at bottom of the soil side of a retaining wall.  

 

These drain-pipe filter socks/sleeves are very common in many developed regions of the world, for use over both flexible tubing and rigid PVC pipe.  Google search for images of "Drain sock sleeve" yields many examples:

 

https://www.google.com/search?q=drain+sock+sleeve&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi5nbG5i87VAhVEQY8KHawmCH0Q_AUICigB&biw=1104&bih=852  

 

These products are also used for foundation drains around homes in the West (although I doubt many Thai homes have them).  See: 

 

https://basc.pnnl.gov/resource-guides/footing-drain-pipe#quicktabs-guides=1

 

https://pro.homeadvisor.com/article.show.Foundation-Drainage.13702.html

 

Although various rolls and sheets of geofilter materials are available in Thailand for protecting the gravel bedding for such drain pipes (example: http://www.tencate.com/apac/geosynthetics/product/infrastructure/tencate-polyfelt-ts-ket.aspx), it would be a real pain to have to cut from such rolls and sheets, and then manually surround the pipe and seam it, as an additional layer to keep silt, soil, and fines from clogging the pipe over its lifetime.  

 

So much easier would be pre-sewn geotextile tubes into which the pipe is inserted (as in the attached photo).   

 

Does anyone know what wholesale or retails outlets might sell such products?

 

Edited August 11, 2017 by Bruce404
better URL for geotextile filtering material in Thailand

[cooked]

Absolutely not, I never saw this stuff in Switzerland either, come to that.

If you contact Rueangsongthai in Buriram, they should be able to help you, http://www.burirambuildersmerchants.com/index.html

they have geotextiles in rolls, no big deal to cut it to size when you know how. They speak English.

What do you mean by 'seam'? I never did that I don't think, just overlapped a bit.

[grollies]

Since I couldn't find perforated drainage pipe (where did you get yours?) I built a frence drain along the high side of a retaining wall.

 

I lined the trench with plastic sheet and used grey 4" pvc pipe and slotted the top half only. Installed in the gravel trench with no geotextile, close to the bottom of the trench.

 

Any soil that gets through the gravel and into the pipe gets flushed out. 18 months on, no problems as yet, still runs near full bore in very heavy rain.

 

Most thai houses have large overhanging eaves to run water away from the base walls.

 

@cooked is right though, simple enough to cut geotextile from a roll. You don't have to see a seam, just overlap.

 

Everyone has their own ideas about how to construct a French drain.

[Bruce404]

Thanks to "cooked" and "grollies" for their comments to my post.

 

True, an overlap wrap of geotextile filter will work, without a seam to make it truly tubular. One  can alway tie around it every half-meter or so to keep the wrap from unfolding during the process of laying the wrapped pipe in the ground.  

 

But nothing beats the convenience of a tubular sock, for which 20-to-24 meters or so of material can be scrunched onto a single 4-meter pipe (as in the lower right corner of the photo in my original post), then 4 or 5 more pipe sections glued on, and the sock slipped over it all, without the hassle of trying to keep in placed folded-over rectangular sections of filter during the maneuvering of the pipe into its trench.  One of my runs is about 68 straight meters.

 

About where to find perforated pipe, I've never seen it in Global House, HomePro, Thai Watsadu, and all the other "big-box" construction-supply stores I have been in.  So I assume 1 cm holes (a tad smaller than one's gravel size) would have to be drilled into rows along the length of the pipe, perhaps every 5-to-10 cm.  I suppose one could also use a reciprocating saw to cut grooves/channels through 1/3 of the circumference.

The big question is whether holes or grooves/channels should face up or down.  There are perhaps 100s, maybe 1000s, of websites that discuss this question.  The great majority seem to recommend that the openings face down -- drilled around 5:00 o'clock and 7:00 o'clock on the circumference of the pipe, with "noon" facing up.  

 

I suppose small amounts of water will drain along the 6:00 o'clock route, and holes on the bottom will make it harder for sand, silt, and fines to drop in from holes on the top.

  

Here are some examples of a few websites on the question (I avoid openly pasting in URLs to videos, as ThaiVisa has the bothersome habit of automatically generating visual images to them that block adding or editing text or more URLs below them):

 

URL #1 (civil engineerng forum)

URL #2 (web page)

URL #3 (YouTube)

URL #4 (chatroom)

URL #5 (builder's forum)

 

Finally, a caveat.  There are many types of drainage systems -- foundation, interceptors, French, berms, swales, dry wells, sumps.  So, recommendations for some may not apply for all.  But the principles of gravity, slope, and keeping out clogging silt, sand, and soil will apply to most all -- and this probably includes where the holes in perfed pipe go. 

 

Edited August 11, 2017 by Bruce404

[Bruce404]

Here's an ingenious packaging system I have used for applying drain-pipe sock/sleeve to either a rigid PVC or flexible perforated drain.  

As mentioned in the video, without the "box", it can be a hassle to slide the sleeve onto the pipe, although certainly easier than cutting rectangular geofilter pieces and wrapping each one around the pipe when long runs are needed.

(PS. I have no financial interest in this outfit or any other in this field.)

 

 

 

 

[eyecatcher]

well a perforated land drain is to carry water from the surrounding soils away...so the perforations are always on the upper 270 degrees. the lower 90 degs needs a surface to carry water away and not back into the soil.

 

you can buy perforated drains here but not at the big box stores. I have seen 100mm and 75mm diameter pipes.

they are designed with oval slots here but really its no big deal just to use an 18mm flat wood bit and drill away.

i did the same to make my soil vent pipe as they dont have  balloon cages here.

 

you can also buy a perforated flexidrain, smaller diameter that they use for drip watering but not sure where I have seen it...maybe the local gardener markets

[kamalabob2]

This morning I  personally examined rolls of proper drainage pipe in large rolls both in 100 mm 4 inch and in 150 mm diameter with connectors. This double wall corrugated Polyethylene pipes was in 50 meter rolls ready for delivery to a home being built in Nong Song Hong.  I was able to speak English with the owner of this builders merchants store in Buriram. Most everything is really available in Thailand to build a home or garden. Getting home improvement stores to understand what you want to build a home in Thailand or drainage in your garden can be a challenge at Global House, Thai Watsadu, Home Mart, Do Home or Mega Home. 

[Bruce404]

kamalabob2, interesting discovery. 

Can you look on this product to identify a manufacturer name, product name, part number, and maybe barcoded EAN universal product code?  And perhaps ask the store's owner or buyer the identity of the wholesaler from whom it was obtained?

That might be helpful to others that reside too far, far away from Buriram but would like to buy some.

 

Edited February 11, 2018 by Bruce404