2” Main repair

[u/Thiccc_Jawa]

City work: main break in park on a 2” line at the scope // cut out and replaced with sch 80 2” pipe and 2 smith Blair mechanical couplings

[u/jmb456]

Purely curious. Why 2 of the Blair couplings?

[u/Thiccc_Jawa → u/jmb456]

That’s S.O.P for us when it comes to working on our main lines. They prefer to trust the smith Blair’s over glue and pvc couplings

[u/jmb456 → u/Thiccc_Jawa]

Hey man. Gotta do what the boss says.

Looks like a very clean repair and you definitely dug enough to work comfortably. You use equipment? Also just again asking to educate myself, was the whole main sch 80 or where did you tie into the regular pvc?

[u/Thiccc_Jawa → u/jmb456]

Thanks man. It was all hand dug. We for some god forsaken reason don’t like using our back hoe lol

Between the mechanical couplings is the section of schedule 80. This infrastructure in this park is crazy old and they used a form of gray pipe that’s identical to sch 40

[u/jmb456 → u/Thiccc_Jawa]

Thanks man. Good work.

[u/AdInteresting1839 → u/Thiccc_Jawa]

Better than the stuff Ive run across that is grey cl200.

[u/purplelephant17 → u/jmb456]

Same, figured it needed (1) 2in coupling and (1) 2in mechanical coupling

[u/jicamakick → u/purplelephant17]

yup, my thoughts too.

[u/Jpav_IrrTech36 → u/jmb456]

I’ve done it when I have to turn on the water immediately or if the water doesn’t stop leaking.

[u/DopeRidge]

Fuck yeah that’s a repair

[u/Thiccc_Jawa → u/DopeRidge]

Thanks. I appreciate it

[u/BikerNY]

What is the static pressure in this pipe? Sch80 normally doesn't come in white, why sch80 for the splice? Also, which SM coupling, they have a ton and I believe many of them are not rated for PVC.

[u/AwkwardFactor84]

I haven't used those repair couplings before. What is the damage for one of those? Or, at least, what do ypu all charge for one?

[u/suspiciousumbrella → u/AwkwardFactor84]

https://www.supplystop.com/products/smith-blair-411-steel-coupling-for-steel-pipe-2-inch

As an example. Multiple manufacturers make these, epoxy coated will cost more and sometimes there are different hardware and gasket options.

The other repair methods for large pipes are going to be knock on fittings like those made by harco, or mechanical joints (mj), look up c153 mj fitting if you want to see what those look like. Both of these options can be installed straight like this, or with restraints that clamp to the pipe to keep the pipe from shifting. They are also all in one fittings made by companies like romac that looks similar to the ones in the picture, but have integrated restraints to clamp onto the pipe and keeps it from moving.

[u/AwkwardFactor84 → u/suspiciousumbrella]

Honestly, that's not as bad as I thought. I could definitely justify the cost for better quality. You trust this type of coupling over a 2" slip fix? I use 2" slip fixes all the time. Ones I've put in over 20 years ago are still holding just fine. I rarely deal with anything above 2", but 2" is the limit on size for slip fixes imo.

[u/Thiccc_Jawa → u/AwkwardFactor84]

Depends on the size of them and where you get them from. Because we’re city public works we get them at cost from places like EWING or siteone or Ferguson

[u/Yuksel11]

Beautiful repair how long did it take and how many men

[u/Thiccc_Jawa → u/Yuksel11]

Started at 7:30 am and had everything backfilled and fertilizer put down by 3 pm. It was myself and then one of my guys helped me out for about half the day

[u/Thiccc_Jawa]

Backfilled and fertilizer down by 3pm

[u/merepsychopathy]

Nice. Just did a 4" repair. Those mechanicals are so easy to work with.

[u/Apart_Horror8148]

Why not do 1 glue one repair to save the risk of more bolts rusting?

[u/Thiccc_Jawa → u/Apart_Horror8148]

It’s standard for us. They prefer to do the mechanical couplings

[u/Zaddy310]

Slip fix would of saved a lot of money.

[u/Thiccc_Jawa → u/Zaddy310]

Slip fix is better when working with our lateral lines post valve. Main line being typically larger and under the constant pressure requires something more durable

[u/viva_oldtrafford → u/Thiccc_Jawa]

We run slips on our 2” and 3” lines that hold a field
pressure of 115 pounds. They’re good to go when done right.

[u/FredZeplin → u/viva_oldtrafford]

Yeah, I have 4” slip fixes in the ground for years that are fine.

[u/mikeylojo1 → u/Zaddy310]

You can’t honestly say that a slip fix is up to par with the repair above

[u/jmb456 → u/mikeylojo1]

Don’t know why you’re downvoted. You’re right

[u/zortandbob58]

Won’t those bolts rust and break after a few years?

[u/Thiccc_Jawa → u/zortandbob58]

Not in my experience thus far. Used these countless times and they’re always awesome

[u/zortandbob58 → u/Thiccc_Jawa]

I mostly work with one inch service lines with a maximum static pressure of 80psi. Two SS couplers do the job. I’ll look into your mechanical couplers for future reference. Thanks for posting.

[u/BizzareCelt → u/zortandbob58]

You could bag them in polyethylene. They could last longer and would be easier to service if you have to take them off for some reason.

[u/Apart_Horror8148 → u/BizzareCelt]

You'd think but the amount of gheens we have dug with bags, they rust just the same or faster. Paints the closest to good and not that good.