Oh boy, I think I'm gonna blow my cannon apart!

[Technician1002]

Alright, I stopped by the local plumbing supply...

Do ya'll DWV freaks approve of this tee???

The T, OK. Now about the glue you used to join PVC and ABS... Um what did you use

Brownie points for the right answer.

[jmccalip]

Alright, I stopped by the local plumbing supply...

Do ya'll DWV freaks approve of this tee???

The T, OK. Now about the glue you used to join PVC and ABS... Um what did you use

Brownie points for the right answer.

Huh, I don't have any ABS? But I would say just use the multi purpose glue.

[Technician1002]

Alright, I stopped by the local plumbing supply...

Do ya'll DWV freaks approve of this tee???

The T, OK. Now about the glue you used to join PVC and ABS... Um what did you use

Brownie points for the right answer.

Huh, I don't have any ABS? But I would say just use the multi purpose glue.

I assumed the black part was ABS.. It's marked PVC in the photo.. my bad. Use primer and ABS cement.

[jmeyer1022]

The T, OK. Now about the glue you used to join PVC and ABS... Um what did you use

Brownie points for the right answer.

Huh, I don't have any ABS? But I would say just use the multi purpose glue.

I assumed the black part was ABS.. It's marked PVC in the photo.. my bad. Use primer and ABS cement.

It's SCH 80 PVC, use PVC primer and glue. No need for ABS anything.

[Technician1002]

It's SCH 80 PVC, use PVC primer and glue. No need for ABS anything.

Awesome Great answer.. Brownie points...

[psycix]

Hmmm 3" SCH 80 ASTM D2567 NSF-pw PVC-1 2

I approve!

[jmccalip]

Ok, I'm going to glue the cannon today, and have it ready to fire tomorrow. I plan on making a 6ft chamber, and a 6ft barrel.

One last question. The 4" PVC pipe says SCHEDULE 40 NSF-PW 220PSI DWV. It's pretty thick stuff and cost $18.99. But is it DWV or schedule 40?

Here is a picture of the pipe text:

http://smg.photobucket.com/albums/v61/s ... 0086-1.jpg

[dewey-1]

Ok, I'm going to glue the cannon today, and have it ready to fire tomorrow. I plan on making a 6ft chamber, and a 6ft barrel.

One last question. The 4" PVC pipe says SCHEDULE 40 NSF-PW 220PSI DWV. It's pretty thick stuff and cost $18.99. But is it DWV or schedule 40?

Here is a picture of the pipe text:

http://smg.photobucket.com/albums/v61/s ... 0086-1.jpg

The pipe is sch 40 PW at 220 psi. It can also be used in DWV applications.

It is a dual rating system.

You can use PW in DWV applications but not the other way around, such as sch 40 DWV in PW applications. (PW potable water signifies a pressure usage)

DWV is a zero pressure rating. Think of sewer pipe in your house verses
the water faucet pipe.

Hope that makes sense to you.

[SEAKING9006]

The Schedule is simply the thickness, it has naught to do with the pressure rating.

[psycix]

Though a SCH80 thickness will certainly hold a good amount of pressure at normal diameters.

[jmccalip]

Ok, I have most of the gun glued. Does it matter if I attach the tee directly to the chamber, or the elbow first? IE, the tee upside down or right side up.

[inonickname]

For clarification;

Schedule (Sch.) is a denotation of wall thickness, not pressure rating.

P.W. (Potable water) means water you can DRINK, by nature mains water is under pressure so this pipe is generally rated.

D.W.V. (drain waste vent) is for waste water. Is NOT normally pressure rated.

Henceforth, you should not find D.W.V. and P.W. on the same piece of pipe. NSF is national sanitary foundation.

[mark.f]

Actually, you can find both ratings on a piece of pipe. Like dewey said, it can be dual rating. The NSF ratings are SANITARY ratings, meaning it is based on how fit each piece of pipe is for delivery of materials for human consumption. PW stands for potable water, which is basically drinking water. DWV stands for drain, waste, and vent, which means it's for handling drain-off, sewer, and vent applications. You can use PW pipe in DWV applications, although most of the time larger diameters of cell or solid-core DWV pipe are cheaper, so there'd be no reason to.

The pipe jmccalip has is well-casing pipe, which is also safe for pressure, since it has a pressure rating stamped on it.

[inonickname]

Actually, you can find both ratings on a piece of pipe. Like dewey said, it can be dual rating. The NSF ratings are SANITARY ratings, meaning it is based on how fit each piece of pipe is for delivery of materials for human consumption. PW stands for potable water, which is basically drinking water. DWV stands for drain, waste, and vent, which means it's for handling drain-off, sewer, and vent applications. You can use PW pipe in DWV applications, although most of the time larger diameters of cell or solid-core DWV pipe are cheaper, so there'd be no reason to.

Basically as said

Of course PW pipe can be used for DWV, but the cost effectiveness is poor. I was basically stating that DWV was for non pressure applications.

Though yes, it can be dual rated but if it's PW it will pretty much take DWV duties as it is. Not the other way round though.

[jmccalip]

Thanks, but about the question on tee placement.

Is this layout OK?



I see a lot of people putting the tee on top, what is the reasoning behind that?