water drill

JethroB · Apr 19, 2021

Diggin It said:
I'm thinking of a variation on this. I'm laying 1" PVC pipe around the perimeter of the house to be able to inject insecticide in the future. Each section has a series of holes drilled at 6" intervals. The idea is to be able to pour the mix (using sweep ells that come up to the surface at each corner) in and let it seep out through the holes.

But I have one or two sections of concrete about 4' wide I'd like to get under. Obviously I can't use the sledge hammer trick to drive the PVC, especially with all the holes. I don't think it would survive without shattering somewhere.

I'm thinking about driving EMT to cut the hole, then extracting it to insert the drilled PVC. The extraction part has me wondering how much force will be required and if a chain, steel cable or something like a recovery strap wrapped around the EMT as a self tightening loop and tied to the tractor will hold the EMT enough to pull it out. Or maybe through drill the EMT and insert a bolt/pulling eye?

How leaving the EMT in place and running the PVC through it? That’s what was done in my post #16 above but heavy galvanized was used.

Diggin It · Apr 19, 2021

^^^ How would the insecticide seep out through the holes in the PVC into the ground if it was inside EMT that doesn't have holes?

I guess I could drill holes in the EMT, but would it still be strong enough to be driven and how long would it last without rusting out? Then again, rusting may not matter.

JethroB · Apr 19, 2021

Diggin It said:
^^^ How would the insecticide seep out through the holes in the PVC into the ground if it was inside EMT that doesn't have holes?

I guess I could drill holes in the EMT, but would it still be strong enough to be driven and how long would it last without rusting out? Then again, rusting may not matter.

I was assuming you were just trying to pass under a 4’ sidewalk or something similar. Would that area need to be treated? Just spit balling here.

Diggin It · Apr 19, 2021

Theoretically, the entire perimeter is supposed to be treated, unbroken. There is an area under the 25 foot wide driveway that won't though, short of drilling the blacktop, which I have no intention of doing.

JethroB · Apr 19, 2021

I once had a 10 year old house re-treated for termites. Where they couldn’t trench for drench they drilled holes every 12 inches in the concrete. Ain’t pretty.
Your idea is interesting but aren’t you concerned the little holes will clog eventually?

Diggin It · Apr 19, 2021

It's a possibility. I'm planning on allowing for a tire type valvestem on each section, so if the fluid doesn't seem to be draining (due to possibly plugged holes), I'll be able to apply 5 or 10 lbs to force it out.

sodamo · Apr 19, 2021

Diggin It said:
I'm thinking of a variation on this. I'm laying 1" PVC pipe around the perimeter of the house to be able to inject insecticide in the future. Each section has a series of holes drilled at 6" intervals. The idea is to be able to pour the mix (using sweep ells that come up to the surface at each corner) in and let it seep out through the holes.

But I have one or two sections of concrete about 4' wide I'd like to get under. Obviously I can't use the sledge hammer trick to drive the PVC, especially with all the holes. I don't think it would survive without shattering somewhere.

I'm thinking about driving EMT to cut the hole, then extracting it to insert the drilled PVC. The extraction part has me wondering how much force will be required and if a chain, steel cable or something like a recovery strap wrapped around the EMT as a self tightening loop and tied to the tractor will hold the EMT enough to pull it out. Or maybe through drill the EMT and insert a bolt/pulling eye?

If you look at my pic going under drive you’ll see I used 3/4 pipe inside the 1 1/2 pvc. The white 2x was a sled to attempt at maintaining direction and level. While I did start using a hammer to drive, I found using the backhoe to pull worked quite well. When finished, I put an eye on the iron pipe to extract.
Note. I wasn’t entirely successful and made several attempts. One that almost worked was using a nozzle on one end and a fitting before the hammer end that allowed me to hook up my hose. This worked well except the tool apparently took a dive as I could never find the end even though I was beyond distance required.
The BH method was my last, but I did without the water.

Here are some pics
Strange, app wouldn’t allow me to include in this post and not access more than 1, so had to post individually. Hope someone in charge notices.

I’m thinking a 4ft section might be fun.
Maybe you could use 1/2 pipe, but it might require 1 1/14 pvc then connect your 1 inch with adapters.

As for the possibility of future clogging, perhaps include a fitting for a pressure hose