Cutting copper pipe under a bathroom vanity can be tight work.
This is even harder when the fitting is soldered in place.
A torch may not be safe in that small space.
That is why many homeowners look at an AUTOCUT-style pipe cutter.
Question
I need to cut a 1/2-inch copper pipe for a bathroom sink.
The old fitting is soldered on.
There is not much room under the vanity.
I need to cut as close as possible to the fitting.
How close will the AUTOCUT get me?
Can it overlap the connector a little?
Answer
No, the AUTOCUT should not overlap the fitting.
It must sit flat and square on the copper pipe.
The cutting wheel must ride on clean, round copper.
If the tool sits partly on the fitting, it may not cut straight.
It can also bind, slip, or damage the pipe.
The cut will only be as close as the tool body allows.
Most close-quarter cutters still need some pipe between the fitting and the cut.
The exact space depends on the cutter brand and model.
Before cutting, check the cutter instructions.
You can also compare the tool width against the pipe space.
A tape measure helps avoid a bad cut.
If there is not enough exposed pipe, use another method.
A mini tubing cutter may give better control.
A fine-tooth hacksaw blade can also work in tight spots.
Use care to keep the cut square.
After the cut, remove burrs from the copper pipe.
Burrs can hurt water flow.
They can also damage supply stops or compression fittings.
For safer plumbing guidance, visit This Old House Plumbing
Or review basic copper pipe advice from Family Handyman.
Bottom line: keep the AUTOCUT fully on the pipe.
Do not let it ride over the connector.
If it will not fit, pick a smaller tool.
I’m Chris Mayer, writing for Plumbing 101.
