Need advice on a macerator install?

[macka09]

hi guys. As the title suggests, I have a customer wanting a toilet and basin fitted under her stairs which is located in the centre of the terraced house. Would a Macerator solve the issue of getting rid of the waste water without an internal drain to link on to? I've not installed a macerator before but on reading up on them I'm unsure whether it's doable. Do all macerators need a vent pipe to atmosphere? Any advice would be a great help.

 

[ShaunCorbs]

@rpm

 

[king of pipes]

rpm is your man on these things . cheers kop

 

[townfanjon]

RPM has gone missing lol .
Yes you could do it providing you can get the waste pipe into the soil stack .

 

[macka09]

RPM has gone missing lol .
Yes you could do it providing you can get the waste pipe into the soil stack .

The idea would be to run the waste from the macerator at low level to the back of the house, where there's a drain. I'm unsure whether the pipe will need to fall or because it's pumped should it be level? Do all macerators need a separate vent pipe? Can it go to a drain that serves the bathroom above or does it need to get to the soil pipe?

 

[townfanjon]

They can pump vertically and horizontal for a fair distance, but they are designed for straight runs , with minimum bends ( pull any bends ) etc not elbows going everywhere. If you install it use 22 mm copper not overflow pipe, I run a mile if I see plastic.

 

[townfanjon]

Sorry , no vent pipe

 

[Best]

I will try to contact RPM
But I think he is having a break from here

 

[macka09]

They can pump vertically and horizontal for a fair distance, but they are designed for straight runs , with minimum bends ( pull any bends ) etc not elbows going everywhere. If you install it use 22 mm copper not overflow pipe, I run a mile if I see plastic.

Does it not have to be 1 1/4" solvent for the discharge?
Also what about connection to an open drain or does it need to go into a soil stack? The Ines I've seen seem to use a vent pipe. It will be picking up a WC and basin.

 

[townfanjon]

The only one I did with a vent pipe was a huge one that went in a factory . I have never seen a vent pipe on anything domestic.
I am no sani expert but 1 1/4 to the sani , but I have always used 22mm copper from the sani to the soil pipe , would never risk plastic on that . Just use a strap on boss on to the soil pipe , biggest problem is the run to the soil pipe.
If the customer wants it , drum , and I mean drum it in to them that all that goes down the pan is what comes out of them , NOTHING else .
No wipes , No kitchen roll , No tampons etc etc etc