Ask Experts Questions for FREE Help !
Ask
    Sealth10's Avatar
    Sealth10 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 5, 2009, 10:18 AM
    4" to 3" drain reduction
    Can I reduce a 4" toilet/sink drain line to 3" at the main stack? Toilet is approx 25' from stack.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Sep 5, 2009, 10:22 AM
    I'd feel a lot better if you were increasing from 3 to 4" instead of choking down from 4 to3". I wouldn't do it but let's wait until the reast of the experts chime in and see what they think.
    What say you guys? Tom
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #3

    Sep 6, 2009, 07:14 AM
    I agree with Tom... I wouldn't do it. Simply put, if someone tried to snake the drain line with a large cutter head and ran into the reduction it could definitely lead to a binding of the cable (if stuff stuck on the cutter head of the cable as it gets pulled back... picture roots from a tree) or a breaking of the sewer snake head.

    Good luck!

    MARK
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Removing 1 1/4" Copper Drain Pipe From Main 4" Drain [ 1 Answers ]

I discovered a big hole behind the drywall in my copper drain line about 3/4' from the main 4" Drain... I need to disconnect the fitting... which direction is the thread... it is in there really tight and is difficult to loosen.

Bathroom Drain slopes "UPHILL" to Min Drain instead of downhill [ 5 Answers ]

My house was build in 2003. Plumbing is PVC. All three bathroom toilets stop up often. The large drain from one of the upstairs toilets is sloping "uphill" to the main drain under the house. What's the best way for me to correct this? Can I cut away some of the vertical pipe and raise to proper...

Tying 2" drain pipe to perpendicular 3" drain line under slap [ 3 Answers ]

I want to avoid a 90 degree bend under slab. However, I have to reduce from the 2" pipe that drains the WM to the 3" main drain line, and the reducing tee I find has a very small sweep. Do I need to use a reducing combination wye and is there such thing?

F1 do I qualify for "Qualified Tuition Reduction" [ 1 Answers ]

I was a Teaching Assistant on F1 visa, and I received Tuition Assistance that covered most of my tuition. However, my university included this assistance as wage on my W-2 and I had to pay taxes on this. However, I've come across with IRS Pub. 970, and on page 7, it has a section called...

View more questions Search