Cutting ABS Straight??

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Geo, Jun 21, 2007.

  1. Geo

    Geo New Member

    Messages:
    15
    This weekend I am going to cut out a section of 3 inch underground ABS out of a hole I cut under my slab to insert a Wye.

    My question is is there any easy way to make sure I get a straight cut? If I don't get it 100% straight I don;t think the banded no-hubs I have will seal correctly since they seem to want a 1/4 inch gap

    Any easy way to make sure the cut is straight? Maybe use raditator clamps?

    Thanks!!!
  2. Cass

    Cass Plumber

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    5,979
    Location:
    Ohio
    That ill work
  3. kordts

    kordts In the Trades

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    551
    Location:
    exurban Chicago
    Hand-eye coordination.
  4. GrumpyPlumber

    GrumpyPlumber Licensed Grump

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    Personally when I am unsure, I break out my plutonium Q-39 space modulator for that.
    (that was grumpy humor)
  5. Cass

    Cass Plumber

    Messages:
    5,979
    Location:
    Ohio
    Huh................using old tools instead of the newest model.........that thingie has to be 50 years old.
  6. leejosepho

    leejosepho DIY scratch-pad engineer

    Hose clamps are bad for your teeth. Cut a couple of feet of 1x4 into three pieces with square ends, then nail then together like a trough to slip/flare down over the pipe and serve as a guide for your sharp handsaw.
  7. HandyAndy

    HandyAndy General Contractor, Farmer

    Messages:
    68
    Location:
    Haxtun, CO
    take a piece of paper and wrap around the pipe and then mark a line on it, the paper edges can be lined up and it will be square, (or at lest the mark you make on it will be), then use the line as a guide to cut it,
  8. GrumpyPlumber

    GrumpyPlumber Licensed Grump

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    well...30 anyway

  9. HandyAndy

    HandyAndy General Contractor, Farmer

    Messages:
    68
    Location:
    Haxtun, CO
    I have never tried this trick but it does make some sense,
    I saw it on an electrical board,
    I would think if it would work on PVC it would work on ABS as well, If you try it report back and tell us how it works?
    or

  10. GrumpyPlumber

    GrumpyPlumber Licensed Grump

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    Guitar string or cable cutter. but, it's not as easy as a hacksaw...best bet is a PVC saw or...if yer skilled...sawzall with a metal blade, good eye and STEADY hand.
  11. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    I thought that the only redeeming feature of PVC/ABS is that your cuts don't have to be perfect--just close. I've never had one leak yet and my cuts are definitely not perfect.
  12. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    I've used string to cut pvc in the ground. Makes for a much smaller hole to dig.
  13. markts30

    markts30 Commercial Plumber

    Messages:
    630
    Location:
    Phoenix, AZ
    A few hints about wire saws and the like...
    1 - you can buy one for a couple bucks at HD etc.... - string only works marginally...
    2 - don't try it if there is any standing water in the pipe... soon as the string/wire breaks through, the water flows into the cut and welds the melting PVC/ABS to your wire and you are done...
    3 - be very careful how you cut as the wire can and will travel in curves - it takes a knack to cut it straight....

    That being said, the wire saw is a great tool for cutting plastics in tight places... but I tend to use a sawsall with an 18 tpi metal-cutting blade for smoother more controlled cuts...
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