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Old 06-28-2015, 05:42 AM   #1
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Drilling drain fitting for dishwasher hose, what size drill bit?


First time dishwasher installation and I need to drill the hole for the drain fitting on my pipe. The internal diameter of the fitting appears to be 14mm. The largest bit under 14mm I have is 10mm. Will that suffice? Or will that create a bottle neck in the draining?

Should I remove the entire piece the fitting is on to make it easier to drill?
Is using a holesaw the best option for this? So I don't create a hole where I'm not supposed to.

Last edited by wesleysnipes; 06-28-2015 at 05:50 AM.
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Old 06-28-2015, 05:58 AM   #2
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That is NOT how to hook up a dishwasher drain. Replace the tailpiece on your sink's drain with one that has a connection for the dishwasher.
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Old 06-28-2015, 06:23 AM   #3
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My piece is exactly this:

Caroma 50mm Combination S And P With Dishwasher Connection

http://www.bunnings.com.au/caroma-50...ction_p4783898

the dishwasher hose fits perfectly over the little left piece, its hollow but blocked off where it meets the main pipe. I dont know if some american plumbing is a bit different because in all of the youtube videos the dishwasher connection piece looks different.
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Old 06-28-2015, 07:01 AM   #4
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Typically,the plug is designed to be knocked out with a flat screw driver---
If you use a drill--get one close in size and ream the hole to allow for full flow.
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Old 06-28-2015, 07:30 AM   #5
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I've never seen that part but like Mike I agree that it is probably designed like a disposal and meant to be knocked out with a round punch of dull screwdriver. I would remove and do the job in the vice.
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Old 06-28-2015, 08:35 AM   #6
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Go o Lowe's they make an adapter
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