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Thread: Franke Drain Pipe size problem

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    Default Franke Drain Pipe size problem

    I am about to instal a Franke CWX161 work centre sink but have run into a problem... I am using the mechanical drain assembly under the large sink and the regular drain assembly under the smaller collander sink... the regular drain pipe fits in nicely with the ABS compression fitting to the 1.5" ABS pipe... however the other drain assembly is a 40mm (not 38mmm like the regular one) polypropylene drain pipe that nobody in this town seems to have a compression fitting for.. the normal 1.5" compression fitting is too tight (barring lubing and forcing it on)... one guy suggested that i shave off a portion of the compression fitting (that didn't sound right) and Franke reps told me they weren't plumbers so couldn't advise me either on why the drain pipe was a different size or as to how to get it to work!

    so far I'm not impressed! but I do need any help you can give me!

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    Moderator & Master Plumber hj's Avatar
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    Default drain

    Need a picture to see what you are working with, although from the picture I cannot see why you cannot use a different drain strainer/assembly, if the one you have does not work.
    Last edited by hj; 12-11-2009 at 11:12 AM.

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    #1 - 40mm drain pipe coming from the large sink
    #2 - 38mm drain pipe coming from the collander - fits fine with normal compression fitting and 1.5" ABS
    #3 - dishwasher will drain here... double drawer KA thus the two white coils
    #4 - turned opposite... where #1 drain pipe will connect to
    #5 - plunger that operates the drain plug for large sink
    #6 - 90 ABS to basement and line that includes vent stack

    all installed on island.. I still have to figure out a way of getting through the tile below the island... but that's another story!

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    ok... I think I may have a solution... as long as I can use ABS glue with polypropylene and ABS together... I found a 45 ABS joint that is pretty snug that as long as I use glue as well then it should be leak proof... anyone know?

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    Moderator & Master Plumber hj's Avatar
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    Default pipe

    You CANNOT glue polypropylene pipe. And "pretty snug" will usually not be "watertight".

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    Quote Originally Posted by hj View Post
    You CANNOT glue polypropylene pipe. And "pretty snug" will usually not be "watertight".
    ok... that saved me from a disaster... so any idea on how I am going to be able to join these two pieces of pipe, cuz the regular compression fittings are too tight unless I start sanding down the inside of the ABS fitting... I can barely squeeze the white ring of the fitting over the Poly pipe as it is, and there is no way barring modification that the poly pipe will fit in the second half of the ABS fitting...

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    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    Try this it will fit over both what you call 38mm and 40mm.

    http://www.fernco.com/plumbing/resid...pipe-connector

    John

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    thanks john... will hunt around town today to see if anyone has this in stock... do you know if HD carries this as a stock item... I think I recall seeing something like this at one point, although not sure if this size was available...

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    just came across a site that explains the different properties of plastics etc here and I think the Franke folks might have told me the wrong name of the drain pipe material... I'm sure the guy said polypropylene but from the chart at the link above it seems to be more of a polybutylene piping as it is definitely grey and not beige like the chart explains... regardless, I think your solution will work as long as I can find this fernco coupling... thanks again john

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    so this is what I have come up with but have been advised that it may not pass code due to "S" in ABS???... what does this mean?... below floor level is a double ABS line that the downdrain ABS hooks up with, one line of which goes to the vent stack

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    Forum Admin, Expert Plumber Terry's Avatar
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    I been advised that it may not pass code due to "S" in ABS???...
    No worries. You live a long ways from me.
    It will only smell in your kitchen, not mine.

    Because the trap is not vented, when the water drains, it will siphon the trap dry, then your wife will start complaining about the sewer smells while she's cooking dinner.

    A fix for that would be to add an AAV on top of a santee, the top for the vent, and the side of the tee for the p-trap.

    This is how most plumbers would have plumbed your sink

    The drain going down should have been 2" and have a clean out.
    Yours is 1-1/2", which hasn't been code since the 50's
    You're about 60 years late on your piping.
    You also haven't high looped or air gaped your dishwasher.
    Last edited by Terry; 12-12-2009 at 07:03 PM.

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    with this project we actually brought in a "real" plumber to start the job as we were taking down a bearing wall that encased the waste vent stack... and this is what he came up with...

    this is just below the island and my intent was to hook up what I had in my previous picture to this assembly thinking that it would provide me with the necessary air to get the water flushing down the system... is there any way I can then work with this?... can I run everything down below the studs and try and create a P trap below the floor and hook it up to the config shown here?

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    ok ... so this is the new "dry" setup showing picts of island as well as the drain and vent pipes below the island

    pict 1 - under cabinet... with DW hooked up on the horizontal run and white drainage hoses would be in large loop on back wall to ensure flow


    pict 2 - from island plumbing to Ptrap... hole (black arrow) shows where line from island plumbing would come down, make a 90, go through joist, and make a 90 into the Ptrap which would hook up with the line (within 10") of where it diverts to the drainage line and the vent stack


    pict 3 - a larger view of the Ptrap to main ABS line in place right now


    is this an ok setup or do I need additional changes?

    is the angle (can't be vertical due to close proximity of the drain line from left sink to sink bottom) of the DW ABS ok... it will probably be about a 70 angle once in place with this setup unless I move it closer to the main vertical line

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    DIY Member export!'s Avatar
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    I don't think most codes allow the P-trap under the floor but I see it all the time. Is that a horizontal vent under the flood rim? Could be a no-no too.


    PS I am not a plumber. Just chiming in.
    Last edited by export!; 12-13-2009 at 09:45 AM. Reason: To make sure nobody thinks I'm a plumber

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    Journeyman & Gas Fitter Doherty Plumbing's Avatar
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    Quote Originally Posted by export! View Post
    I don't think most codes allow the P-trap under the floor but I see it all the time. Is that a horizontal vent under the flood rim? Could be a no-no too.


    PS I am not a plumber. Just chiming in.
    You can put a p-trap under a floor no problem. If it's not readily accessible it must be a glued trap not a union trap.

    If you couldn't put traps in floors how could you ever put a trap on a shower or a bath tub

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