Hello,
I have a 35-year-old house, which does not have a roughed in place for a bathroom, and I am looking at putting one in. I was looking at the saniflo toilets and they seem like they will be right for me. I am looking at putting in 1 toilet and 2 sinks. My question is how do I vent this system? I can't access the existing house vents, nor am I suppose to use an air admittance valve, can I run a vent out the sidewall of the basement (near the ceiling of course)? If so, what type of venting materials will I need (PVC pipe, etc)? Any other ways to vent this?

Has anyone had any experience with these saniflo toilets? Reactions?

Thanks, Nic

Here's what Saniflo has to say aboul vents. The venting that you'll have to install will depend on the model you purchase.
Venting
As per plumbing code all p-traps need to be vented. Therefore, even though macerating systems are isolated from the main drain system (by means of a check valve), we need to vent the trap of the hand basin, shower, bathtub and possibly a bidet. The following external macerating systems need to be vented: Saniplus, Sanipro, Sanipack and Sanibest.

Products with built-in motors need not to be vented as they are considered to be a forced main. These units are known as Sanicompact, Sanimarin and Sanistar.

External macerating systems have a tapping on the lid, generally located on the right hand side and are 1 ½-inch diameter. To start one need to saw of the cap and connect the provided 1 ½-inch accordion connector to it. Then a street-elbow can be pushed into the other side of the accordion connector and one can finish off the vent installation in 1 ½-inch pipe.

Please note that a vent pipe slopes upwards (¼-inch per foot) when running in the horizontal plane. If one cannot get at the house’s vent system, the vent pipe may run along the joists to the outside of the house. Do not use an air admittance valve (also known as cheater vents). These are one-way devices and block air movement in one direction.

Macerating systems need a two-way air movement, out when the toilet is flushing, i.e. water running into the pump case and in when the macerating unit is pumping water out of the case.

Note: When connecting to a vent system, please push the provided plastic cap into the breather opening located on the left hand side of the lid. Otherwise there exists the possibility for odor (not sewer gas but odor). PVC pipe will be the easiest to vent with. Good luck

Thanks for the quick reply,
So basically I will be able to run the vent for the saniflo, and 2 sinks to a common 1 1/2" vent pipe and then slope it up and out horizontally to the outside wall? The saniflo takes a 1 1/2" vent. Will this be the same diameter as the sinks?

Thanks again, Nic

Go back and read"venting" again. Before I can even comment on the venting I have to know what system you're installing. Different vents for different systems. Tom

Sorry about leaving off that information. I am looking at the external macerating system called Sanibest.

"I am looking at the external macerating system called Sanibest

The following external macerating systems need to be vented: Saniplus, Sanipro, Sanipack and Sanibest. This means your system requires a DEDICATED VENT. you may not connect this vent into a existing vent but must run it out the roof as a separate vent. You will also to vent anything that has a "P" trap. However you may revent this back into a existing vent at least 6" over the highest flood rim if you wish. While we prefer 2" for our vents 1 1/2" is acceptable. Regards, Tom

I will need a dedicated vent for the Sanibest. This must go out through the roof and can't go out a sidewall?

And I will need 1 separate vent for the "P' traps. Which can run out the sidewall at least 6" above the highest flood rim.

2 vents in total. I just want to make sure I am understanding this correctly.

Thanks, Nic

"I will need a dedicated vent for the Sanibest. This must go out through the roof and can't go out a sidewall?"

You may terminate the dedicated vent out the sidewall if local codes permit.

" And I will need 1 separate vent for the "P' traps. Which can run out the sidewall at least 6" above the highest flood rim.
2 vents in total. I just want to make sure i am understanding this correctly?

Sorry I confused you. The 6" over the flood rim thing was just if you ran up and revented back into a existing vent. You may also take the lavatory vent out the side if local codes permit. Unless the two lavatorys you wish to install share a common stubout and drain each one will have to have its own vent, however you may tie them together before you exit the house. Cheers, Tom