Portable dishwasher question

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by skittles, Oct 18, 2012.

  1. skittles

    skittles New Member

    Messages:
    1
    Location:
    Ontario
    I have a portable dishwasher and as a result my facets keep leaking due to the back pressure. I would like to know if its possible to get an under the sink attachment that I could open and close that could somehow be long enough to pull out and attach to the dishwashers adapter and leave them in the kitchen sink (for drainage). This could bypass my faucets. Any suggestions are appreciated.
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    "back pressure" does not cause leaks. Faucets are designed to operate under the full pressure of the line. You have a bad seal wherever you see the leak. Repair the faucet
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,233
    Location:
    Cave Creek, Arizona
    quote; Faucets are designed to operate under the full pressure of the line.

    Not true. Spouts are NEVER subjected to "full pressure" when operating normally. When a dishwasher is connected, then the flow is interupted and then they get full pressure, which is not what the spout hoses and seals are designed for. There is no connection which will work the way you are asking, unless you modify the dishwasher hose and cut off the end, which would mean it could not be used the intended way again unless you replaced the hose unit.
    Last edited: Oct 20, 2012
  4. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    There are quite a few million portable dishwashers out there . I strongly suspect that faucet manufacturers take that into account/ Most spouts I have seen are radial o-ring seal....the same type of seal we use on 3000 PSI hydraulics and 4500 PSI air, in my 'former life'.

    I think the weak spot would be the stem seal on the faucets, but these should also be "OK" He has something wrong which can be repaired, and far more easily than jury rigging something under the sink!!!!
  5. kreemoweet

    kreemoweet New Member

    Messages:
    371
    Location:
    Seattle. WA
    I have had to replace (with a faucet of different design) numerous kitchen faucets with pull-out spouts, because they failed when used with a portable
    dishwasher. Some faucets with pull-outs are now being made such that the dishwasher adapters cannot be installed at the outlet.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,233
    Location:
    Cave Creek, Arizona
    quote; I strongly suspect that faucet manufacturers take that into account/ Most spouts I have seen are radial o-ring seal....the same type of seal we use on 3000 PSI hydraulics and 4500 PSI air

    Do you REALLY think faucet manufacturers worry about, or design a faucet, to handle a portable dishwasher. They do NOT consider that a "normal use" for a faucet. Did that 3,000 psi hydraulic or 4,500 psi air connect "rotate" the way a spout does or did they have 3000 and 4500 psi "clamps" around them?
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