Sani flo toilets

hufpc8w3adnk65

Hi lads.

I'm thinking about installing one of these under my stairs at home. I cannot get a 4inch waste under the stairs without some serious construction. I could get a 2inch (is that the size these normally take?) for the waste from under the stairs out under units in the kitchen behind the kick board and tie it into the 4inch waste from the bathroom upstairs without too much trouble. The run of pipe would be less then 20 feet. There wouldn't be any fall in the waste pipe from the toilet it would be level(no rises) all the way too the 4inch. I have acess too mains and tank fed water locally and too power too fit the spur. I also belive these toilets need too be "vented"? As in some sort of realise for gas's? I'd also be fitting a wash hand basin and running the waste out through the saniflo too

hufpc8w3adnk65

Any help here lads please?

sullzz

MrMac84 wrote: »

Any help here lads please?

What was the question ?

nmacc

Theoretically the Saniflo doesn't need 2"; the manufacturer will tell you that it can work through 22mm overflow pipe. However using this on a horizontal horizontal run may not be ideal. A vertical pipe (upwards) is fine, but beware of low spots in the horizontal pipe. If can happen that the macerated waste and paper may not completely clear the pipe after a flush. Eventually enough will build up to cause a blockage.

The pipe between the Saniflo and the soil pipe doesn't need to be vented; there is an in-only air vent on top of the Saniflo. Personally I think 40mm pipe laid without dips would work fine. But don't take my word for it!

hufpc8w3adnk65

nmacc wrote: »

Theoretically the Saniflo doesn't need 2"; the manufacturer will tell you that it can work through 22mm overflow pipe. However using this on a horizontal horizontal run may not be ideal. A vertical pipe (upwards) is fine, but beware of low spots in the horizontal pipe. If can happen that the macerated waste and paper may not completely clear the pipe after a flush. Eventually enough will build up to cause a blockage.

The pipe between the Saniflo and the soil pipe doesn't need to be vented; there is an in-only air vent on top of the Saniflo. Personally I think 40mm pipe laid without dips would work fine. But don't take my word for it!

Well too help prevent any blockages around half way on the soil pipe I'm going too fit a T rather than a straight through and blank the top of the T and I was thinking also where the pipe meets the 4inch waste rather then an elbow heading too the soil pipe I could fit a T there and blank the top of the T so I can get acess fairly easy but I think this would actually cause more blockages in the long term with tissue gathering


The in only air vent on top of the unit does that need too be piped too the outside or would the normal air in the room suffice?

Thanks for the help lads

antoinolachtnai

We have one.

First advice would be to run a separate pipe for the sink if it is feasible. It just makes the whole thing easier to manage.

I think we have a run of 22mm pipe on it. The pipe has never been an issue, even though it has a couple of right angles on it. If you don't have any right-angles, I can't see that much benefit in a larger pipe (i think the saniflo spec is a choice of either 22mm or 32mm). The actual outlet on our unit is actually more like 10 or 15mm. I think that a large pipe would be almost as likely to foul as a small one, though it would take longer.

If I were you, I would want to have a fall, however slight, on the pipe so that any water left in the pipe will drain out naturally. Even 2 or 3 cm of fall (the difference between the smaller pipe and the bigger pipe when you think about it) will give a bit of drainage and make blockages a bit less likely. However Saniflo specify a 1 in 100 fall (so I would want to have a fall of 6cm over 6 meters to meet this requirement - http://www.saniflo.co.uk/upload/pdf/Saniflo%20-%20Ten%20Golden%20Rules.pdf)

We have had issues with the macerator. It basically works well, but you have to be careful when having guests use it and make sure to have a bin available there, and make clear to guests that they must not put anything in it other than toilet paper (and the obvious).

There is no real problem with venting. There is a vent on the unit, as described previously.

Still, I would look at this carefully, and see if there is a way of doing it, even if it involves some construction. The saniflo unit will cost you a few hundred euros anyway, and after 20 years experience with one, I would say it is worth spending a further 1000 euros to avoid having a saniflo. But it is obviously your budget and your decision.

hufpc8w3adnk65

Does the vent on the unit need too be piped too the outside or can it suck in air that's in the room already?

nmacc

The vent is quite happy to use the air in the room, but I don't know the building regulations around ventilation for a toilet, so it would be worth checking.

I agree with antoinolachtnai, while they allow for a toilet where it would otherwise not be possible, they have their own issues. The oddest being that some of them just stop, for no obvious reason, maybe only once every 4 or 5 years. I have opened them up - neither an easy or a pleasant job - and found no obvious reason for the jamming. A simple twist on the macerator gets them going again.

That said, they usually come with a good on-site warranty.

I wouldn't bother with a separate pipe for the whb. It's easy to connect it to the Saniflo and I've never encountered an issue cause by grey water. Assuming we exclude the case where the tiler thought it would be a good idea to rinse all his left-over grout down the washbasin

Maid Upname

Hi, I'm new to Boards.

I was googling and found this thread. We are hoping to install an en suite in our bedroom, but were advised that Saniflo is the only option due to location of drains etc. I went down to Davies Bathrooms to have a look and pick out some sanitary wear, but I thought they installed and they don't.

Can anyone recommend a plumber (Bray area) who has experience of installing these?

Thanks

Maid Upname

Hi, can anyone help with the above query? Dublin area and willing to travel to Bray even?

Thanks