Grundfos Poo Pump

[MortarThePoint]

I'm considering a Grundfos Sololift2 WC-1 macerator over a Saniflo Santitop UP for a WC+basin situation. They seem cheaper which makes me nervous as Saniflo are the known brand. The Grundfos one looks better made though. Does anyone have any experience with either unit?

 

If you've installed the Grundfos Sololift2 WC-1, is the installation guide just saying it needs to go horizontally in something larger before it goes down to 22/25/28mm?

 

[Nickfromwales]

4 hours ago, MortarThePoint said:

I'm considering a Grundfos Sololift2 WC-1 macerator over a Saniflo Santitop UP for a WC+basin situation. They seem cheaper which makes me nervous as Saniflo are the known brand. The Grundfos one looks better made though. Does anyone have any experience with either unit?

 

If you've installed the Grundfos Sololift2 WC-1, is the installation guide just saying it needs to go horizontally in something larger before it goes down to 22/25/28mm?

 

The larger bit of pipe (500mm section) is a non-rigid / semi-flexible piece of pipe used to mitigate vibration / nuisance noise throughout the downstream discharge pipework   

 

You can convert to ‘rigid’ PVC or copper after that. 👍.

 

Only ever fitted Saniflows sorry, but I doubt Grundfos wouldn’t be comparable tbh.

 

Next issues will be how high up you need to pump etc. Needs to comply with the installation diagram in case of a warranty claim. 
 

For completeness, I’d rather 💩 in a bucket than fit one of these.

[MortarThePoint]

1 hour ago, Nickfromwales said:

The larger bit of pipe (500mm section) is a non-rigid / semi-flexible piece of pipe used to mitigate vibration / nuisance noise throughout the downstream discharge pipework   

 

You can convert to ‘rigid’ PVC or copper after that. 👍.

 

Only ever fitted Saniflows sorry, but I doubt Grundfos wouldn’t be comparable tbh.

 

Next issues will be how high up you need to pump etc. Needs to comply with the installation diagram in case of a warranty claim. 
 

For completeness, I’d rather 💩 in a bucket than fit one of these.

 

Macerators are definitely a serious compromise, but sometimes needs must.

 

The whole path is down hill but I can't fit 110mm pipe, just 32mm solvent weld. The path is approximately 5m at a low downwards slope, then 3m straight down followed by 0.3m at a gentle slope leading into the 110mm stack. It should be as kind to the macerator as possible.

Edited 5 hours ago by MortarThePoint

[marshian]

1 hour ago, Nickfromwales said:

For completeness, I’d rather 💩 in a bucket than fit one of these.

 

When we extended the house we wanted the extension to contain an ensuite

 

In order to do this we had to consider using

 

1. Macerator pump unit

2. External soil pipe and vent

3. Internal soil pipe (boxed)

 

1 was easiest, 2 would look horrible but was a better option than 1, 3 was the most work but overall would give the perfect result of not using 1 or having unsightly external soil stacks

 

I'm with @Nickfromwales except I'd rather sh*t in my hands and then clap over my head than go down the macerator route

[Nickfromwales]

27 minutes ago, MortarThePoint said:

 

Macerators are definitely a serious compromise, but sometimes needs must.

 

The whole path is down hill but I can't fit 110mm pipe, just 32mm solvent weld. The path is approximately 5m at a low downwards slope, then 3m straight down followed by 0.3m at a gentle slope leading into the 110mm stack. It should be as kind to the macerator as possible.

Sounds like a challenge. 
 

Why not ‘exactly’? FYI I have run 5m of 110mm almost snooker table flat before (to get rid of one of these forever-failing offending articles) and not a days trouble ever since.

 

I’d stick £20 on this being doable. 

[MortarThePoint]

13 minutes ago, Nickfromwales said:

Sounds like a challenge. 
 

Why not ‘exactly’? FYI I have run 5m of 110mm almost snooker table flat before (to get rid of one of these forever-failing offending articles) and not a days trouble ever since.

 

I’d stick £20 on this being doable. 

 

There are only two alternative routes:

1. Falling 100mm across 5m (1:50 so OK)but would then need to create a box out at the bottom of a large floor to ceiling window which would look terrible
2. Passing through the ceiling of the en-suite below and then having a large box out along the ceiling to take the 110mm pipe about 1m across the ceiling

It's a bit late in the game too as tiling and things have been done in the rooms below based on using a small pipe.

[Nickfromwales]

24 minutes ago, MortarThePoint said:

 

There are only two alternative routes:

1. Falling 100mm across 5m (1:50 so OK)but would then need to create a box out at the bottom of a large floor to ceiling window which would look terrible
2. Passing through the ceiling of the en-suite below and then having a large box out along the ceiling to take the 110mm pipe about 1m across the ceiling

It's a bit late in the game too as tiling and things have been done in the rooms below based on using a small pipe.

Stop now, or regret forever more.

 

Suck it up, fit the pipe. You can use 3” pipe btw, instead of 4”, if you didn’t know that. 

[saveasteading]

1 hour ago, MortarThePoint said:

Macerators are definitely a serious compromise,

Not if it solves a problem.. I've only ever used them on site, so that the thunderbox never needed emptying. One moved from job to jobby and saved probably £thousands.

An option is to use solid pipe and gravity til out of the house, then pump up to another solid pipe. The outside units are different in appearance .

Then only you know there is an occasional rumbling noise in a manhole.