Odd plumbing problem

[Rookie]

Vent pipes used to be two inch PVC through the roof. In cold weather, condensation freezes and closes the vent pipe. Most newer homes run 3 inch PVC through the roof to help with this...

 

[ultra...good]

Yeah I always fought with the too much verses too little pitch. When I ran waste lines for my place I made a little wedge to go on the end of my level to help me stay accurate.

But then when you go from one floor to the next it is just a straight drop down. How do the solids and the water stay together then? It seems to work as I got the second potty going upstairs and had to field test it to be sure.

Just a guess, but assume that during a straight drop, solids and liquid fall at the same rate. Gravity being non-discriminatory and all.

 

[ultra...good]

Vent pipes used to be two inch PVC through the roof. In cold weather, condensation freezes and closes the vent pipe. Most newer homes run 3 inch PVC through the roof to help with this...

I have only seen a 2" vent pipe on one place, and that was a 2 season home, neither being a winter season. The pipe was cast iron and the place was built way before PVC was used. The majority of the properties I have are 3" cast iron. One 3 unit place I have is 4" cast. Heck, you cannot even buy a roof flashing for 2' pipe. At least not one that I have found.

 

[dudley0]

Just a guess, but assume that during a straight drop, solids and liquid fall at the same rate. Gravity being non-discriminatory and all.

Well that makes sense. *shakes head because I am a dummy*

I have only seen a 2" vent pipe on one place, and that was a 2 season home, neither being a winter season. The pipe was cast iron and the place was built way before PVC was used. The majority of the properties I have are 3" cast iron. One 3 unit place I have is 4" cast. Heck, you cannot even buy a roof flashing for 2' pipe. At least not one that I have found.

Lowes still has 2" boots. They even have a cap that slips over the old boot. I have used them on places that had checked boots. They work.

I have some duplexes built by the same guy back in 2000. He ran 2" up to about six inches from the roof then upped it to 3 inches. Still does what it is supposed to, but looks odd in the attic.

 

[jkaetz]

Well that makes sense. *shakes head because I am a dummy*



Lowes still has 2" boots. They even have a cap that slips over the old boot. I have used them on places that had checked boots. They work.

I have some duplexes built by the same guy back in 2000. He ran 2" up to about six inches from the roof then upped it to 3 inches. Still does what it is supposed to, but looks odd in the attic.

I imagine 2" is easier to work with inside 2x4 walls.

 

[ultra...good]

I imagine 2" is easier to work with inside 2x4 walls.

Anytime I build a wall that I know will have drain lines in it, I build with 2x6. 2x4 walls do not have much left even if it is only 2" drain lines in them.

 

[Rookie]

I have only seen a 2" vent pipe on one place, and that was a 2 season home, neither being a winter season. The pipe was cast iron and the place was built way before PVC was used. The majority of the properties I have are 3" cast iron. One 3 unit place I have is 4" cast. Heck, you cannot even buy a roof flashing for 2' pipe. At least not one that I have found.

https://www.homedepot.com/p/Oatey-No-Calk-1-5-in-to-3-in-Aluminum-Gray-Roof-Flashing-12942/205655574

20+ years ago, all they used on the new construction jobs I worked on, they used 2 inch PVC...

 

[ultra...good]

https://www.homedepot.com/p/Oatey-No-Calk-1-5-in-to-3-in-Aluminum-Gray-Roof-Flashing-12942/205655574

20+ years ago, all they used on the new construction jobs I worked on, they used 2 inch PVC...

Never really thought of that type of flashing, but sure, it would work. I have seen PVC vents for furnace through a roof on newer construction and just did not put the two together.
Whenever I have done a roof on my buildings, I use the lead flashing. Like these:

 

[dudley0]

Never really thought of that type of flashing, but sure, it would work. I have seen PVC vents for furnace through a roof on newer construction and just did not put the two together.
Whenever I have done a roof on my buildings, I use the lead flashing. Like these:

But those will last so much longer than the rubber boots.... wait.... ummm, nevermind

 

[CHCRandy]

I’m not sure which was better. This bit or the broken dishwasher one.

I loved them guys when I was younger. I listened to Bob and Tom every morning for years. They had some great ones over the years. Remember the Air bass guy? Jimmy Pardo.....lol. Those were the days.