Knock on couplings

[muddywater]

Anybody using these for 2" pipe? I am leaning toward trying more of these on 2" maybe even 1 1/2" pipe. I just don't feel good about telescoping couplings on these. I guess the only downside is we would have to keep a tool on the truck to bevel the edges.

[Irrigation Contractor]

I have banned my guys from using them on mainline period! LOL

1" to 2" can be used for laterals, but in the end our rule is to do it right with all new fittings if possible.

[mitchgo]

I don't know this term tho i've probably seen it. Link?

[Wet_Boots]

Originally Posted by mitchgo

I don't know this term tho i've probably seen it. Link?

we don't need no steenking link




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[ArTurf]

I used them on a main line at a golf course one time. As far as I know they held up, I haven't been back there in a while.

[CAPT Stream Rotar]

I've put those on a main line in Hollistan, MA @ some shotty Builder site..

Nothing like dripping 100+ declining trees off a rotor zone..

[agrostis]

I think those fitting's are junk. Steel only. The problem is you can't get ductile iron fitting's smaller than 2 1/2 inch's.

[muddywater]

Originally Posted by agrostis

I think those fitting's are junk. Steel only. The problem is you can't get ductile iron fitting's smaller than 2 1/2 inch's.

Why are they junk? A couple local golf superintendents swear by them.

[HokieAg07]

Harco Knock Ons are all I use on 2 1/2" and larger. Easy as pie.

[agrostis]

Originally Posted by muddywater

Why are they junk? A couple local golf superintendents swear by them.

Unless you have a perfectly straight run of pipe that never move's, those thing's will split along their construction seam. I try to use ductile iron only.