Macerator / saniflow query

[Cpaulc]

Hi all, hopefully someone will be able to help me with this question. I have already done a lot of digging around this site and others and not found an answer....
Yes a macerator pump is needed (absolutely no room to get a normal waste pipe back to the soil pipe) I appreciate all the associated issues with them... We have not decided on a specific model yet, or indeed whether it is possible at all.

I will be putting the toilet on the ground floor, and just 3m horizontally from the soil pipe. Ideally i would like the pump to push the waste down (12 inches to below floor / joist level), then horizontally 3m (at the recommended 1%) to join the top of a horizontal run of our soil pipe. - QUESTION - will the pump cope with the initial drop to below floor level? or will i need a small amount of vertical inside the cavity to allow for back pressure to the pump, then once past the check valve the drop and then horizontal run?

Or .... Option 2 is to pump up and into the ceiling (2m), but this will require drilling through 3/4 joists before i can get a straight run to the vertical soil stack (3m). which i know is not ideal either and will require jointing lots of pipe.

Any thoughts team ??

Thank you
Paul

 

[centralheatking]

Hi all, hopefully someone will be able to help me with this question. I have already done a lot of digging around this site and others and not found an answer..
Yes a macerator pump is needed (absolutely no room to get a normal waste pipe back to the soil pipe) I appreciate all the associated issues with them... We have not decided on a specific model yet, or indeed whether it is possible at all.

I will be putting the toilet on the ground floor, and just 3m horizontally from the soil pipe. Ideally i would like the pump to push the waste down (12 inches to below floor / joist level), then horizontally 3m (at the recommended 1%) to join the top of a horizontal run of our soil pipe. - QUESTION - will the pump cope with the initial drop to below floor level? or will i need a small amount of vertical inside the cavity to allow for back pressure to the pump, then once past the check valve the drop and then horizontal run?

Or .. Option 2 is to pump up and into the ceiling (2m), but this will require drilling through 3/4 joists before i can get a straight run to the vertical soil stack (3m). which i know is not ideal either and will require jointing lots of pipe.

Any thoughts team ??

Thank you
Paul

Put up a plan drawing of the layout and then an elevation with the relative heights marked. This way you will get some advice. Centralheatking

 

[rpm]

Paul, turn off the blocker to allow a personal message through.

 

[king of pipes]

Rmp' s your man my opinion dont do it 😱. Kop

 

[rpm]

I'm happy to stand aside for this Rmp guy or gal 😛 and totally agree use them only as a last resort