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Thread: Are All Pressure Assist Toilet Noisy?

  1. #1
    DIY Member herbolaryo's Avatar
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    Exclamation Are All Pressure Assist Toilet Noisy?

    I am trying to find a toilet that is to be used for the second floor. However underneath the 2nd floor bathroom is the guest room.
    One criteria is an efficient toilet which makes pressure assist a top choice. However, I heard that it is noisy...

    Are All Pressure Assist Toilet Noisy?
    What brands are not that loud when flushing?

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    All pressure assist toilets I've seen are noisey. Not all pressure assist toilet work all that well. Some are known to shread things, and leave little bits floating in the bowl when finished, which doesn't help, since you then have to flush again, wasting the water you were supposed to save.

    On Terry's home page are links to some independent tests on toilet performance. Many of the best flushing toilets are not pressure assist. It's all in the quality of the engineering. A pressure assist also requires more expensive parts that are not available everywhere when it eventually needs service.

    Personally, I'd stay away from them and use one of the highly rated gravity flush toilets. I've had good luck with the Toto toilets I've bought, they are quiet and work well; plus, they've gotten great reviews.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3

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    Who cares if it's noisey. Put it in a warehouse and flush it there.
    Ther not taht noisey anywha. Maybe cyan hear them from 65 gett away.
    but you shoudn't nt that clo9se anyway.

  4. #4
    Moderator & Master Plumber hj's Avatar
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    Default toilet

    They are noisy just by definition as to how they flush. In most cases the water is at 60 psi or more when the flush starts, compared to 1 psi or so for a conventional toilet.

  5. #5

    Default Noisy Toilets

    Help! I am in the midst of remodeling a bathroom. It sits between my 4 yr olds room and the master bedroom. The problem is the 4 yr old wakes at the slightest noise and obviously we need to flush sometimes. We need to replace the Kohler Wellworth as it is not strong enough for the waste that is produced in our home. What is a good strong toilet that is quiet?:

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    Homeowner geniescience's Avatar
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    no solution in sight, AFAIK. Eliminating the flush valve is a good step, but what to put next is hard to know.

    Bowl Flush noise, and then drain flow noise, are not easy to measure with even the best instrumentation, and way way harder to describe. Any flush down toilet will be good; someone may like one or another, but all you will get is anecdotal information.

    In a year from now he'll be that much older, and at some point he'll sleep through anything.

    In the meantime, after the new toilet, if that doesn't help enough, you either adjust living habits or you rebuild: solid walls and cast iron drains.

    david
    Last edited by geniescience; 05-28-2007 at 08:19 PM.

  7. #7
    Homeowner geniescience's Avatar
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    Quote Originally Posted by WallPaperDown
    ... not strong enough for the waste that is produced in our home. What is a good strong toilet that is quiet?:
    I'll bet your water supply pipes were too small to produce the flow that the Weelworth needed. The pipe has to be large to let any flush valve work as designed. If true, then you can conclude that your waste is not the problem. Any flush down that has a smooth noise when flushed will be fine for your situation.

    david

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    Forum Admin, Expert Plumber Terry's Avatar
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    The Wellworth is one of the poor flushers out there. I remove them all the time.

    There isn't much that is super quiet anymore. The ones in the past took over nine gallons to do it quietly.

    I installed a standard height Drake toilet at my daughters home, and it seems pretty quiet though. She has kids, and they haven't plugged it yet in 1.5 years.

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    DIY Member herbolaryo's Avatar
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    There is an independent joint testing done by USA and Canada for Maximum Performance of toilet fixtures for pressure assist, gravity,etc.
    http://www.cuwcc.org/MapTesting.lasso

    However I have not seen any noise/acoustic testing for toilets... Even in the manufacturers technical specification/manual, there is no mention of such.
    I know its kinda too detailed for independent testers to take there time and do this... But there are situations like when you have an elderly, a baby, live in an multilevel apartment where noise level can really be an important issue.

    Is there a website which makes such noise testing?

  10. #10
    DIY Member herbolaryo's Avatar
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    I found one toilet that is dual flush and pressure assist and has the highest maximum performance rating of (1000) ...
    Zurn Z5572 EcoVantage EL ADA...
    http://www.zurn.com/pages/catalog.as...OperationID=19

    I contacted the manufacturer with regards to the noise level... Here is his reply...

    "Our Z5562 dual flush pressure assist toilet is quieter than most pressure assist models in the market today. Many manufacturers vary on how noise (Db) ratings are tested / measured on toilets, so it is very difficult to measure one toilet against another based on their published noise ratings.

    On average, our EcoVantage series of pressure assist toilets have equal to or lower Db ratings than most low consumption gravity operated toilets in the market today."


    The bottomline is it looks promising because of its performance and water saver at the same time...However, the claim that it is equal or lower noise than the conventional gravity operated toilets is still a claim...

    In its website, it says it is a commercial toilet... Has anyone seen or have this in there property?
    Last edited by herbolaryo; 05-29-2007 at 10:21 AM.

  11. #11
    Forum Admin, Expert Plumber Terry's Avatar
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    MaP testing
    None,
    And the testing you mention, doesn't look into things like

    Quality control
    Bowl cleaning
    Ease of Assembly
    Ease of repair and cost of repair
    Noise levels
    Longevity
    Style and appearance
    Depth of water in bowl
    Total dimensions (some round bowls are longer that others elongated bowls)

  12. #12
    DIY Member herbolaryo's Avatar
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    Exclamation

    So far I have this partial list of Pressure Assist with a high maximum performance rating... (I rank it based on decreasing Maximum performance done by veric)


    1. Zurn Z5572 Ecovantage EL ADA
    Characteristic:Two piece, Elongated, Pressure Assist, Dual Flush, ADA compliant, 2 1/8" trapway
    Maximum Performance rating: 1000
    Comments:
    a. "In our experience, the some of the absolute quietest toilets in the industry flushes at around 70 db… The high range for noise ratings in toilets are over 110+ db. Our EcoVantage pressure assist toilets average in the 80s for a decibel level." ---Zurn representative
    Noise Level:
    Price:

    2. Mansfield EcoQuantum 148-119RHCL
    Characteristic: Two piece, Elongated, Pressure Assist, Dual Flush, ADA compliant, 2" trapway
    Maximum performance rating: 925
    Comments:
    Noise Level:
    Price:

    3. Gerber Ultra Dual Flush DF 21-324
    Characteristic: Two piece, Elongated, Pressure Assist, Dual Flush, ADA compliant, 3 1/8" trapway
    Maximum Performance rating: 800
    Comments:
    Noise Level:
    Price:

    4. Gerber Maurice One piece Pressure Assist 21-012
    Characteristic: One piece, Elongated, Pressure Assist, 3 1/8" trapway
    Maximum Performance: (no rating published but Gerber have 800 or + rating)
    Comments:
    Noise Level:
    Price:

    I made the following assumption: 1. The larger the trapway diameter, the less likely to clog; 2. One piece toilet is easier to clean. 3. Performance can be objectively compared using stats from independent testers.; 4. Dual Flush saves the most water compared to other types; 5. Pressure assist makes the toilet bowl side cleaner coz it pushes down the water from the rim rather than "vacuum" it in from under like the gravity fed; 6. Pressure assist will be noisy??? coz of the high pressure; 7. ADA compliant is better coz the bowl height is right so it won't be a "pain" on your knees; 8. Elongated is better so it is easier for the guys to "Aim"; 9. Cost of repair????I dont know yet; 10. Longetivity??? I don't know yet

    P.S. I am not affiliated in anyway with any of the manufacturer... Just a homeowner doing a bathroom remodel and some research... So I am listing facts based on reports, testing and manufacturer specs.

    I will update the list so it can be a summary...
    I am emailing the manufacturers for added info...
    Please do include comments, corrections or personal experience on the list of toilet like noise level, repair, ease to clean...etc.

    and if you have a toilet model which you can add, please do post...
    Last edited by herbolaryo; 05-29-2007 at 06:55 PM.

  13. #13
    Forum Admin, Expert Plumber Terry's Avatar
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    Trapways on the pressure assist toilets are about 2" at the outlet.
    Many of the Gerber are 1-7/8"

    It doesn't matter if you have a large end on a funnel, it still needs to squeeze out of the end.

    Pressure assist toilets are mainly siphon jet, with just a little bowl wash in most cases.

    All toilets rated at 1.6 gallons use about 1.6 gallons.
    Meaning, there is not really an advantage either way from going pressure assist, or using a large flapper.
    Some pressure assist bowls take the paper and poop, break it up, and will leave little bits and shreds in the bowl after a flush. Looks a little bit like soap in the bowl when done.

    Humans average about 250 grams.
    Anything over 500 grams is probably overkill.

    It's easier to get repeat sales from toilets that use a 3" flapper.
    Repeat sales from pressure assist toilets are hard to get.
    I've been selling them for more years, but you can't really argue with the mothers and their kids and tell them to buy another one.
    They will let you know if they want more like it.
    I guess that's why I don't get many orders for them.
    Last edited by Terry; 05-29-2007 at 12:04 PM.

  14. #14
    Homeowner geniescience's Avatar
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    Default conclusion?

    so to answer the original query, YES pressure assist will be noisy. Flush down, or gravity, toilets may be a better choice.

    I suggest new thread, called "Sounds. Toilet flush noise." where people post clickable sound file attachments so everyone can compare toilet flush noises.

    It might require a lot more bandwidth from the site host.

    david

  15. #15
    Forum Admin, Expert Plumber Terry's Avatar
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    I have quite a bit of video now from different toilets.
    I guess I better edit it up and post it.
    They are all done with the same camera with built in mic, Sony VX2000

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