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Discuss Macerator noise comparison Saniflo vs Grundflos: Desperate to do the right thing! in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Leigh Florence

    Leigh Florence New Member

    Hi all

    I live in a second floor flat and my toilet needs a macerator. I have bought the Grundfos Sololife 2 CWC-3 wall hung macerator 620W from Screwfix. Grundfos tell me the noise level for this pump is 70dB(A). It cost me £320.

    I bought this a while ago as had to wait for the builders, so now would be difficult to return.

    However, I am desperate to do right by my neighbours and want the quietest solution. My old building is like a tin can.

    I see that Saniflo do a similar type to the one i want, much more expensive and i think a newer model the Sanipack Pro Up. It says the Bruit is 48dB(A). This will cost me at least £400.

    I have a floating chipboard floor on top of joists. The builders tell me they are going to put some underlay down and screw the mascerator to the floor. Can they do more?

    Can anyone please advise me, should i make the change. Will this make a significant difference? Are these noise ratings really comparable?

    Thank you to any kind, informed person who can help me!

    Leigh
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

  3. Leigh Florence

    Leigh Florence New Member

    Is this a reply shaun? I cannot see anything.
     
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Just tagging in our macerator expert
     
    • Agree Agree x 1
  5. Leigh Florence

    Leigh Florence New Member

    ok thank you!
     
  6. rpm

    rpm Trusted Plumber Top Contributor!!

    Bruit ? What branch of medicine are you in?

    Stick with what you`ve brought, just follow the instructions re installation.
     
  7. Leigh Florence

    Leigh Florence New Member

    I'm just reading what is on the website. Not in medicine.
    It would really appreciate it if you could share with me why you are giving me this advice, so i can understand your thinking.
     
  8. rpm

    rpm Trusted Plumber Top Contributor!!

    Grundfos is a good pump correctly installed and used.
    To sell it you would loose money.
    I don`t believe everything I read.
    I`ve yet to hear the new Saniflo Up range as they are so new on the market.
     
  9. Leigh Florence

    Leigh Florence New Member

    Okay. Thank you for taking the time!
     
    • Like Like x 1
  10. Leigh Florence

    Leigh Florence New Member

    Hi i've installed the Grundfos, and it runs every 5-7 hours when not in use. Can you tell me if this is expected. I called technical support and they told me it wasn't and to check the return valve (which plumber said okay), leaking appliances (toilet and shower - seem okay) and if not faulty pressure valve. Got a replacement from screwfix, installed that, does exactly the same thing. In your experience would you expect the macerator to come on a run for a few seconds periodically when not in use? Have no idea what to do now. Please help maserator expert!
     
  11. neilrj

    neilrj New Member

    Pressure rise and probably pressure drop too! set these things off, I lived in a remote grotty countryside house (no neighbours) and using a tap would set it off occasionally, and overnight with no use of any outlets, I assume that was a leak but did it even with everything isolated!
    Hated it, but at least it was plumbed in with unjointed pipe and with a fall, so never a worry of a pressure jet of you know what..
    Saniflo bog, complete, not just the shredder pack.
     
  12. rpm

    rpm Trusted Plumber Top Contributor!!

    My $ is on one of two things.
    1 The flush valve is ever so slightly leaking water into the pan.
    Use toilet paper and dry around under the rim and about 3" down. Use a few squares of toilet paper and lay them under the rim then see if they become wet over time.

    2 The discharge pipe has little or no rise on it therefore the non-return valve has no weight of water on it to fully close it allowing a dribble of water to return over time.

    Please let me know which one was correct.
     
  13. rpm

    rpm Trusted Plumber Top Contributor!!

    PS
    How you finding the noise, is it acceptable?
     
  14. Leigh Florence

    Leigh Florence New Member

    Thanks will let you know if either of those have passed them on to my plumber. The noise sounds too loud to me. My plumber says no different to saniflo. It was a big shock when i first heard it, and i have had to come to terms with it, but am bracing myself for neighbour problems. I asked the plumber to take the sink and shower out and run them independently. He took the sink out, but said the drop on the shower was not good enough so didn't advise it. But am not sure he just didn't fancy changing it now it's done! I wish i had thought about/or been advised that i didn't have to put everything through it, not sure why i thought i did. Also the macerator comes with 4 dip switches. No-one (plumber or technical support at Grundfos) are able to tell me which setting (1,2,3 or 4) in my situation would be preferable. Technical support tell me it is 'customer choice', but as i don't understand what they do, i can't choose! I was kind of hoping that a half flush (that i may use during the night) wouldn't set off the macerator and this is what upping the level of the dip switch would do for me? But to be honest i don't understand it, my plumber doesn't and the technical support people don't either which is kind of frustrating. I have a shower that is about one meter to the sololift2, a toilet that is about 30cm away, and a waste pipe that runs from the macerator for about 1.5m before joining the soil pipe. If you can suggest what dip switch may be best for me and why you would be helping me again! Many thanks
     
  15. rpm

    rpm Trusted Plumber Top Contributor!!

    Think you mean you can adjust the motor run time which I wouldn`t advise doing.
    The start level is 72mm and the stop level is 52mm off the top of my head.
     
  16. Leigh Florence

    Leigh Florence New Member

    Well that's the point really i don't know what i mean. The dip switches came out of the box with 1 and 4 pressed down my plumber said. Technical support said the default is 1 pressed down, and that determine the time before the macerator runs. Delays of 1, 2, 3, 5 and 7 seconds are possible settings depending of which combination of switches you choose. I asked which scenarios would determine what time is best and he said the unhelpful 'customer choice'. A more knowledgeable person from Grundfos is meant to be calling me back, but nothing yet. When you talk about start and stop level i am assuming you mean water level. So i guess the longer the time before running the higher the level. As a consequence the run time will be longer. So swings and round abouts in terms of noise, but I just wanted a half flush not to make it run, so thought if water at higher level before kicking in then there may be a better chance?
     
  17. Leigh Florence

    Leigh Florence New Member

    Ps i just did test 1 RPM and the paper got wet! I saw my plumber check this, he obviously needs to learn about the loo paper test!
     
    • Winner Winner x 1
  18. rpm

    rpm Trusted Plumber Top Contributor!!

    Ok, tbh I wasn`t entirely sure so I spoke to a friend who is more hands on with Grundfos pumps than I am and .
    The switches are to adjust the run time and as I thought the activation levels (52 start & 75mm stop) are fully automatic as per all macerators. To know setting you need to know how long is the discharge pipe and how many bends in the line and tbh I wouldn`t go messing in case you invalidate the warranty but this is up to you.

    Glad you found the reason for it self activating and surprising how many plumbers don`t know the tissue test. ;)
     
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