Macerator noise comparison Saniflo vs Grundflos: Desperate to do the right thing!

[neilrj]

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.

 

[rpm]

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.

 

[rpm]

PS
How you finding the noise, is it acceptable?

 

[Leigh Florence]

PS
How you finding the noise, is it acceptable?

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

 

[rpm]

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.

 

[Leigh Florence]

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.

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?

 

[Leigh Florence]

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!

 

[rpm]

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.

 

[Leigh Florence]

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.

Hi again
Have to come back to you again to see if you can help me, because having a nightmare. I still have the same issue of water leaking into the pan. I have had new WC Grohe wall hung frame replaced because their engineers felt it must have been something to do with their cistern. I had to have my new bathroom wall taken apart to access it. Grohe had never had this issue but felt it could only be their issue. But after fitting the second one there is still the tiniest of dribble (that i identified from the toilet paper test) coming into the bowl. Plumber said (again) its probably the water held in the rim of the toilet but surely doesn't take 2 hours to drain away and become dry. Can you tell me about the rise and fall issue? If not the cistern is there any other way to cause a leak into the toilet pan? I just know it's going to eventually set off the macerator and that is not right, it might be 6 hours from now but it's going to happen. Also, when the toilet was off didn't seem to be a leak coming out the sticking out pipe. Please help!

 

[rpm]

Re rise and fall, there is a non-return valve to stop pumped water running back into the macerator and setting it off again.
This valve needs a weight of water to fully close it.