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Thread: 4" PVC DC question

  1. #1

    4" PVC DC question

    Hi guys,
    Almost done with my DC and hit a snag. What fitting do I need in order to attach the flex hose to the 4" PVC? I thought a street cleanout fitting was the one... But no.

  2. #2
    Join Date
    Aug 2019
    I think one of these, I have not set up a DC system but have been researching. Hopefully someone with the right experience will chime in

  3. #3
    Join Date
    Dec 2005
    West Lafayette, IN
    Clearvue has fittings that will work too.

    I think 4” flex will make it over 4” S&D pipe, it’s just not easy. Some people cut slits in the pvc so it can get a little smaller. Could be wrong, as I use 6”.

  4. #4
    Cut a short pieces of 4" pipe (like 4" long) Mark two parallel lines along the length about 1 1/8" apart. Cut out the marked piece with a jigsaw. Squeeze the ends together and cover with a piece of foil tape.

    This will now slip inside 4" pipe and the hose will slip over it to be fastened with a clamp in the usual fashion. If you are connecting to a fitting hub, you will have to first insert a short piece of un-modified pipe, and then slip the adapter into it.

    Depending on your particular type/brand of pipe, the 1 1/8 may need to be adjusted. This works for any size pipe; you just have to adjust how big a slice you cut out of the pipe.

    If you want a fancier solution, there's a guy on utube that made a set of MDF forms, heats the pipe with a heat gun, and uses the forms to create a smoothly bent adapter.

  5. #5
    Depending on the type of flex, if you strip out several windings of wire it will slip it over the pipe more easily.

  6. #6
    Join Date
    Sep 2016
    Modesto, CA, USA
    Buy a tall can of pineapple juice and see if the can works for you with both ends cut out. I took a tape measure to the canned goods section an that is what I got to connect dc 4" hose. i think the spaghetti sauce is not the same can.
    Bill D

  7. #7
    Join Date
    Mar 2003
    SE PA - Central Bucks County
    A simple way to adapt PVC to flex hose is merely to take a piece of sheet steel (including cutting up a piece of snaplock) and rolling it so it fits inside of the PVC. That gives you a flange to clamp the hose to. Be sure to use screws or pop rivets to fasten the metal to the PVC so it doesn't slip out.

    The most expensive tool is the one you buy "cheaply" and often...

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