I have to install some PVC between already in-place fixtures.
I can install them dry easily, because I can rotate parts to insert a piece.
This won't work when I weld them -
unless I do multiple joints at once.
Are there any other tricks?

I have had the same issue the only solution I have been able to use is work from each end to meet in the middle somewhere and cement one coupling two joints at once. Or use a no-hub if it's a drain.

Easier to pull the fixture or pre fab as much as possible and work fast

a sheilded no hub coupling used in the right place might help?
swipe a slight coat of something slippery inside the rubber (bernabeu uses butter) to help the pipe rotate easily.

the no-hub coupling, if 'rolled back', needs no lube

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

'rolled back'?

Stick the shield loosely over one side - back from the joint

Put the rubber on one pipe ONLY, roll the rubber back on to itself sort of like one end inside out.

Align pipe ends after gluing everything else.

Un fold / un roll rubber onto pipe.

Slide shield over joint - tighten - voila : PLUMBING

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

i seem to remember hj describing it like rolling up a shirt sleeve.

Couple of weeks ago I tried to roll back a Fernco 300-150 while joining two 1 1/2 ABS pipes and could not do it, no matter how hard I tried. The stop inside the coupler was shallow enough that I was able to force it past the edge of one pipe and then after lining up the second pipe I was able to slide the coupler back in place.

Here's a link from our sponsor, showing the rolled back coupling, start to finish(scroll down the page).
[www.plumbingsupply.com]

Can also use slip couplings, compression couplings, or unions depending on the application whether it's pressure (like irrigation or pool) or drainage.

george,


No-Hub Couplings are often confused with Flexible Rubber couplings which are a much thicker walled rubber coupling with two stainless steel clamps but do not normally include a stainless steel shield. As defined in the Uniform Plumbing Code section 705.4.2. a mechanical joint shielded coupling for hubless cast-iron pipe and fittings shall have a metallic shield where installed aboveground. Flexible rubber couplings with stainless steel clamps, without a shield, are designed for use below ground.

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

[www.homedepot.com]
from "Fernco Experts"

Q: Is there some trick to folding back the black neoprene onto itself?
Am replacing a straight section of cast iron, not much play. I can
fold back the same type coupling on 2" and above, but not this 1 1/2",
too small and thick. | Apr 10, 2023

A: Hello Joe, Thank you for your interest in our products. With the 1
1/2, Unfortunately no, as they are size on size and do not give much
play. Especially due to thickness of insert. by Fernco Product Expert
| Apr 12, 2023

By 'slip couplings' do you mean repair couplings,
the kind without a stop in the center? I don't
see how to make those work unless I'm really
fast, or don't put cement on the coupling.

This works for ANY 'above ground' shielded code compliant no-hub coupling as per the UPC.

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638