My Industrial Cabin Build

[EddieWalker]

I'm sure it will be fine, but the one step blue glue usually gives a stronger bond. I've never fixed a one step joint, but have repaired lots of two step joints done by others over the years. Basically the timing between applying the primer and the glue is critical and lots of people don't pay attention to it.

Interesting observation. I've never heard of, or seen PVC come apart when purple primer and clear cement was used. From what I understand, the purple primer breaks down the PVC and softens it so that the clear cement can melt the fitting together. It's more like a chemical welding process then actual glue. I know that AC guys use the blue stuff all the time on drain lines, which is fine since it's not under any pressure and it's not buried in the ground. I have seen the blue stuff come apart and would never use it myself. To me, it's worth spending the couple extra dollars to get the very best product available.

 

[EddieWalker]

View attachment 527555

Is that a clean out coming off of your toilet vent line? I'm a huge fan of putting in as many as I can, but I never thought of putting one in behind the toilet. Are you doing your own framing too?

 

[WoodChuckDad]

Is that a clean out coming off of your toilet vent line? I'm a huge fan of putting in as many as I can, but I never thought of putting one in behind the toilet. Are you doing your own framing too?

The pipe on the left is toilet. The second one is a cleanout with a wet vent coming out behind it that will handle drain for the sink that will sit over the cleanout and the vent pipe that comes straight down to it. Yes we are doing our own framing. My sone-in-law is a carpenter with many years of framing experience , so he will be helping us.

 

[deezler]

Wait, what am I seeing here? Are you going to fill that entire foundation with 57a? Like, 3 feet deep worth? Why.... did you make the main 4" drain lines so low? Or the floor height so high? I'm confused as heck. Nice progress though! Keep rockin! Lucky to have such a good helper. My wife didn't want to get her boots dirty when we built our place....

edit: oh, crawl space? I was assuming slab floor. nevermind. duh, haha

 

[WoodChuckDad]

Wait, what am I seeing here? Are you going to fill that entire foundation with 57a? Like, 3 feet deep worth? Why.... did you make the main 4" drain lines so low? Or the floor height so high? I'm confused as heck. Nice progress though! Keep rockin! Lucky to have such a good helper. My wife didn't want to get her boots dirty when we built our place....

edit: oh, crawl space? I was assuming slab floor. nevermind. duh, haha

This is slab. I'm building in a hill about an 8-10% grade. The hill behind me is uneven. Slope increases from front left corner of house to rear right corner(SE to NW). I was already down 5 feet behind the house in the middle and quite frankly, I didn't dig as flat as I thought I had so when they came in to dig the footers they used a laser and I was off east to west. By a foot or so. I was using a string level.
It will be 100 tons of fill. The 4 inch pipe is dug in so low because the waste pipe exits the front of the house about 5 feet down. So I dug a trench that gave me a straight shot to the exit at 1/8 to 1/4 tick.

 

[hddnis]

Interesting observation. I've never heard of, or seen PVC come apart when purple primer and clear cement was used. From what I understand, the purple primer breaks down the PVC and softens it so that the clear cement can melt the fitting together. It's more like a chemical welding process then actual glue. I know that AC guys use the blue stuff all the time on drain lines, which is fine since it's not under any pressure and it's not buried in the ground. I have seen the blue stuff come apart and would never use it myself. To me, it's worth spending the couple extra dollars to get the very best product available.

The one step blue glue is the strongest joint you can make in PVC in my experience, although some tests say the gray cement (no primer) makes the strongest.

The primer is required by code in some areas, so if you have to use it then you can still make a fine joint.

Regardless of the type of cement you use primer will make the joint WEAKER. Primer does not make a joint stronger and does not reduce leaks.

This student did some in depth testing using Oatley products and found the same thing. We did a demonstration day at the pipe yard one year and found the same thing, but we pulled the joints apart with two forklifts which is a lot more fun. Do You Need PVC Primer?

Keep in mind that primer is the same solvent that is used in the cement, it just doesn't have the pvc added to it like the cement does.

Good prep, quick assembly after cement application, and turning the pipe seem to be the most critical for a good joint.

Hope that sheds some light on the whole topic. Like I said, I don't see anything the OP did that makes me think his joints are not good strong joints.

 

[EddieWalker]

The one step blue glue is the strongest joint you can make in PVC in my experience, although some tests say the gray cement (no primer) makes the strongest.

The primer is required by code in some areas, so if you have to use it then you can still make a fine joint.

Regardless of the type of cement you use primer will make the joint WEAKER. Primer does not make a joint stronger and does not reduce leaks.

This student did some in depth testing using Oatley products and found the same thing. We did a demonstration day at the pipe yard one year and found the same thing, but we pulled the joints apart with two forklifts which is a lot more fun. Do You Need PVC Primer?

Keep in mind that primer is the same solvent that is used in the cement, it just doesn't have the pvc added to it like the cement does.

Good prep, quick assembly after cement application, and turning the pipe seem to be the most critical for a good joint.

Hope that sheds some light on the whole topic. Like I said, I don't see anything the OP did that makes me think his joints are not good strong joints.

Interesting link. Thank you for posting it. I can see where he drew his conclusions, but I have a problem with his testing method. Not a single one of his tests where on properly seated connections, and there is no way to know if he applied the products as required from Oatly. My personal esperince is based on fixing pvc pipes that have fallen apart with blue glue on them in attics. Maybe it'st the heat, or maybe it wasn't installed properly. I don't know for sure. I've never had a failure, or know of any when purple primer is used and clear cement.

According to Oatly on there website.

"Primers are an important piece of the solvent cement process and are required by building codes for most applications. They help prepare the pipe and fitting for solvent cementing by cleaning and softening the pipe and fitting to maximize final joint integrity. For most cases, a cleaner should be used, followed by a primer and then the solvent cement. Additionally, after application of the primer, the solvent cement should be applied immediately before the primer dries. Note that primers should NOT be used for ABS pipe and that cleaner should be used in its place."

This is what my water departments requires, and it's how I'll continue to do it.

 

[pmsmechanic]

You are so fortunate your wife is involved!

 

[buckeyefarmer]

Did my own plumbing with purple primer and glue, and nothing has come apart in 20 yrs so far.

 

[Rustyiron]

I understand the purple color was added (after years) for the building inspectors visual verification that it was used.