Installing a 4″ sewer cleanout

Installation of an ABS 4″ two way cleanout tee in an existing cast iron sewer pipe

NOTE: READ MIKE THOMAS’ comment below. – As per Mike Thomas’ comment below, the screw cap is inadvisable. It should be replaced with a loose fitting rubber cap instead (in case of sewer backup this cap will pop off and prevent the house filling with sewer water)

Update: Note Richard’s comments below (in reply to Mike Thomas’ comment) : This idea might be fine in my situation where the clean out is OUTSIDE the house, clearly visible to anyone entering the house. However, you wouldn’t want to implement this loose-cap idea if the clean out was in a basement or crawl-space – or indeed any place where a spillage might not be noticed for hours or days. Having poop belching out on to the lawn I can deal with… in a crawl space, not so much:)

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Comment (0)

  1. Rule of thumb when glueing pipes together, lightly glue the socket end and heavy glue the spigot or pipe end that prevents the glue from the socket end pushing into the fitting and creating a glue lump inside the fitting.

  2. With a right angle T like that, how do you ascertain that future snake, runs in which direction? And wouldn't it be better to use two 45s, one toward each direction for proper cleaning, if that becomes ever needed? Also, we are told to fill the under pipe area with larger pebbles and gravels, with the depth according to the applicable code.

  3. Great job. The only thing is, the way I was taught was the cap on the clean out should be fitted loosely. That way the next back up will come out the cleanout in the yard and not in the house making a mess in the tub and shower. I would rather have it stink up outside the house and not inside. On the 4 inch pipe coming out of the ground just set a rubber cap on top and don't tighten the hose clamp, in fact take off the hose clamp so nobody tightens it.

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