DWV clean out plug or antler

I came across this during an inspection. I’ve tried finding something else like it but can’t. I’m thinking it may be an old-school type of plug that I can’t find, but want to make sure. Has anyone seen anything like this?



It’s ET’s hand.


That’s how Bambi was birthed!!

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You’re going to have that when a reindeer falls down the vent stack…

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but on another note did You notice the support they put under that HVAC supply run ???

It’s a double dong test plug.


So, how does that riser drain? …or is it even hooked up?

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WARNING!!! whatever you people do, DO NOT!, put this into images search of google! You have been warned! :see_no_evil: :rofl: :upside_down_face:


No kidding! I guess I didn’t hang around enough plumbers while building homes.

Martin, will you be my pal? :man_shrugging: :upside_down_face:

Just forget the double dong part, K?


It’s an old plumber slang Simon :slightly_smiling_face:

We are pals Larry :blush:


It is an older version of this expansion plug:

Martin, that plumber slang is best not used around millennials! trigger phrase!


Robert they must have the discharge side of the wye open and the clean out side closed. I have no idea why this is in place in this configuration.

These are only used when stack testing. It allows a means of draining the stack test into the city sewer safely.

I have two of these somewhere in the garage and they must be 40 years old.

That’s OK Simon it will give the millennials time to pause and realize they are not in their pumpkin spice realm. Millennials are a delicate bunch.

Hey Martin,

Thanks for the info. Will these work on a septic system? The house isn’t on a sewer.

Simon, Thanks for the laugh! That was too funny.

It’s just a plug for a 3” PVC pipe. They need to glue in a clean out plug.

How do they get the plug out when they need to do a clean-out if it is glued in?

The handle can rotate counterclockwise. This will release the rubber seal.

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