How do you usually tackle installing a new drain—DIY or call in a pro?

- I always measure the main runs and check for square, but honestly, once you hit those weird corners, it’s a lot of “cut and fit as you go.”
- Extra couplers are pretty normal in older places. I’ve never had leaks from properly glued PVC, even with a bunch of joints—just make sure you clean and prime every time.
- If you’re worried, give the joints a little twist when you glue them. That’s helped me avoid leaks, even in some pretty Frankenstein setups.

I hear you on the “cut and fit as you go” approach—those weird angles always seem to pop up right when you think you’re cruising. I’ve had to wrestle more than one stubborn pipe into place, usually while lying on my back under a sink and questioning my life choices. I will say, I’m a bit paranoid about leaks, so I double-prime sometimes. Overkill? Maybe, but I’d rather overdo it than mop up a mess later. That little twist trick is gold, though. Saved my bacon more than once.

I get the paranoia about leaks—nothing worse than thinking you’re done, then spotting a drip an hour later. I’m usually a “measure twice, cut once” type, but those odd angles always throw me off too. I’ve never double-primed, though... just stick to one coat and cross my fingers. Curious if you ever use those flexible couplings for tricky spots? They’ve saved me a few headaches, but I wonder if they’re as reliable long-term.

Title: How do you usually tackle installing a new drain—DIY or call in a pro?

Curious if you ever use those flexible couplings for tricky spots? They’ve saved me a few headaches, but I wonder if they’re as reliable long-term.

Flexible couplings definitely have their place, especially when you’re dealing with old pipes that don’t line up or weird angles behind walls. They’re code-approved in most places for repairs, but I wouldn’t use them everywhere. Long-term, they’re fine if installed right—tightened to spec and not over-torqued. The real issue is people using them as a shortcut instead of fixing alignment, which can come back to bite you.

On the priming—one coat is usually fine if you’re using the purple stuff and you’re quick with the glue, but I’ve seen some joints fail when folks rush or skip it altogether. Double-priming isn’t standard, but making sure you get full coverage (especially on older pipes) is key.

I’m with you on the paranoia. I always run a test fill before closing anything up. Nothing like thinking you’re done, then finding a drip right at the last minute... especially when it’s above a finished ceiling.

Not sure I’d call flexible couplings a “long-term” solution everywhere. In my experience, they can dry out or loosen up over the years, especially if there’s any vibration or movement. I get that they’re code for repairs, but I’ve seen more than one leak show up a few years down the line.

- If it’s behind a finished wall or ceiling, I bite the bullet and fix alignment with solid pipe. Less risk of callbacks.
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“I always run a test fill before closing anything up.”

Just my two cents—sometimes shortcuts cost you more in the long run.