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I have this toilet bowl:

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It's hanging on the wall.

I bought this toilet seat:

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The seat is suited for bowls at least 45 cm long, mine is 42 cm long. As result, the ceramic rim is visible (reentrant) and a nuisance for men (you get the idea).

I checked and the remaining dimensions of my bowl would allow me to reposition the seat 3 cm backwards. I only need to drill new holes in the upper surface of the ceramic bowl.

Is this dangerous? I would use a diamond bit, submerge in water and use a cordless drill at low speed.

How should I proceed, besides changing bowl (it was expensive)?

  • 3
    This is a bad idea. Even if you do manage to drill the holes without cracking the toilet bowl, you will be changing the stresses on the structure, and considering this appears to be a wall-hung toilet, this would be very risky. – brhans Jul 23 '18 at 13:13
  • @brhans I thought that the upper surface would not be under much stress. Thanks – FarO Jul 23 '18 at 13:19
  • Very high risk of failure imho. I'd think about an adapter plate that attaches to the toilet, jogs sideways, then attaches to the seat. – Aloysius Defenestrate Jul 23 '18 at 13:31
  • The upper surface will be under tension, and even 'successfully' drilling it could easily introduce invisible stress fractures in a brittle material like porcelain. – brhans Jul 23 '18 at 13:33
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    @AloysiusDefenestrate my second option is to build an adapter that "translates" the attachment at the expense of some increase of thickness. – FarO Jul 23 '18 at 13:51

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