Saniflo Rough In - Water shooting out of sink drains?

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Tuttles Revenge

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First. That is NOT a Saniflo.

Its hooked up to too small of a drain which should be in the installation instructions. Since its a pump, it should be pumped to wherever it can connect to the proper sized drain and typically downstream of other gravity connections where possible. Whatever Drainage Fixture Unit(DFU) equivalent that pump is pumping at is the size of drain it should be connected to.

PS. The rest of the drains are not sized correctly for 1.5" drains either since only 2 DFU are allowed on Vertical and only 1DFU on horizontal.
 

RockinRobLee

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First. That is NOT a Saniflo.

Its hooked up to too small of a drain which should be in the installation instructions. Since its a pump, it should be pumped to wherever it can connect to the proper sized drain and typically downstream of other gravity connections where possible. Whatever Drainage Fixture Unit(DFU) equivalent that pump is pumping at is the size of drain it should be connected to.

PS. The rest of the drains are not sized correctly for 1.5" drains either since only 2 DFU are allowed on Vertical and only 1DFU on horizontal.
zx
 
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John Gayewski

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I think a real honest to goodness vent would help. I'm not familiar with what you're using there, but the air needs to be pushed out of the piping as water enters. With a pump, down the drain, isn't always the easiest path. That aav isn't good. Looks like it could get gunked up really easy. Then you'll have more poop on the walls.
 

RockinRobLee

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I think a real honest to goodness vent would help. I'm not familiar with what you're using there, but the air needs to be pushed out of the piping as water enters. With a pump, down the drain, isn't always the easiest path. That aav isn't good. Looks like it could get gunked up really easy. Then you'll have more poop on the walls.
zx
 
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Tuttles Revenge

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but the air needs to be pushed out
Yes, this is true too. The waste that enters a sealed vessel displaces air inside that vessel that must go somewhere.

What that manual is showing is the flow chart of the pump. The higher the pump has to lift waste, the more work and the slower it pumps. I can't read the picture really well, but in order for the discharge to slow down to the point that 1.5" is the appropriate size, the discharge pipe must rise a specific height. Currently i has almost no restriction and is probably discharging at 4x the capacity of 1.5" pipe.
 

Tuttles Revenge

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Poop on the walls is definitely NOT an option! lol thank you for the response.
We had a client where when the inspector found some existing pipe work asked that it be brought up to code. The homeowner asked why and i explained that it was to prevent poop from explosively exiting their kitchen sink and hitting the ceiling. The homeowner mentioned that it had happened once before... I was flabbergasted that they hadn't mentioned that at the beginning as something they wanted to remedy in the remodel.
 

RockinRobLee

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We had a client where when the inspector found some existing pipe work asked that it be brought up to code. The homeowner asked why and i explained that it was to prevent poop from explosively exiting their kitchen sink and hitting the ceiling. The homeowner mentioned that it had happened once before... I was flabbergasted that they hadn't mentioned that at the beginning as something they wanted to remedy in the remodel.
zx
 
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Weekend Handyman

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I am not a plumber.

As an aside ... many brands of pex warn against exposing it to adhesives (looks like coloured electrical tape you are using to mark hot/cold).
 

Tuttles Revenge

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I'm thinking more that the pump should be discharging downstream/after any other fixtures. The riser pipe can be of almost any diameter because its a pumped line.. and likely should remain a smaller diameter to prevent settling of solids. But rising up to a height that the pump discharge meets the rate at which the pipe can accept will help.
 
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