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Trying to cap a water line that connects to my sewage out line. I purchased a cleanout adapter with cap in 2" and 3" and one is too big and one is too small. I think I need a 2-1/2" connector.

NOWHERE in my local brick-and-mortar stores can I find this size, which leads me to believe...

  1. I am measuring incorrectly, or
  2. The builder used some off-the-wall size and that is why I am having such a pain time to find the correct cap

To use the convertor coupler, is this the right size I'd need? (tried to block out the local box store as I wasn't certain if that was permitted to post)

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Machavity
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Stanley Jones
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2 Answers2

9

If you can't find a 2-1/2" cleanout adapter, but can find a 2", then consider this option instead:

Depending on your local suppliers, you might be able to find a cleanout adapter which will fit directly into the end of the reducer coupling, which then makes the 6" stub of 2" pipe unnecessary.

My (layman's) interpretation of the IPC - 708.7 Minimum Size rule for cleanouts is that Exception 1 probably applies:

stack cleanouts that are not more than one pipe diameter smaller than the drain served, shall be permitted

brhans
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6

If you have both sizes in hand and neither fits the pipe, then it's not an issue of measuring...

You don't indicate what brick and mortar stores you've looked at. I'm presuming you when to the local big-box retailers. Try an actual plumbing supply house instead. I'm pretty sure they'll have exactly what you're looking for. Bring them a pic of a tape measure across the pipe you're looking to put the fitting on and show it to the guy at the counter. Either he'll point you in the right direction or he'll have it pulled off the shelf in the back room before you put your phone away.

FreeMan
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