[HoneyDo]

Can I connect my washing machine waste pipe into the toilet waste pipe? It is the nearest possible place to discharge my washing machine now I have movedit into the garage.

[speedball1]

Can I connect my washing machine waste pipe into the toilet waste pipe? It is the nearest possible place to discharge my washing machine now I have movedit into the garage.

Yes you may, providing you vent the washer trap. If running a vent up is too much of a hassle consider installing a AAV, (air admittance vent, see image) downstream from the washer trap. Good luck, Tom

[doug238]

Tom, the new code no longer allows this because of the shallow trap on the low flow toilets. Any fixture discharging from a pump or motor [washing machine or disposer or dishwasher] must be connected at least 10' downstream of any unvented fixture. By unvented I am referring to any fixture that is using the main as a wet vent.
[side note] if you have a 4" pipe then it is unlikely that the pump or motor will affect the toilet, but it still will not be code compliant.

[speedball1]

tom, the new code no longer allows this because of the shallow trap on the low flow toilets. any fixture discharging from a pump or motor [washing machine or disposer or dishwasher] must be connected at least 10' downstream of any unvented fixture. by unvented i am referring to any fixture that is using the main as a wet vent.
[side note] if you have a 4" pipe then it is unlikely that the pump or motor will affect the toilet, but it still will not be code compliant.

Thanks Doug,
I got to take my code book down to the building department and get it updated or just purchase a new one.