[walker426]

I think we can all agree that I am the recognized authority on crown vents

Does that have to be 3 inch at the base of the stack for the laundry in cleveland where I am that would be code

 

[Tommy plumber]

I read somewhere that a crown-vented trap also inhibits the self-scouring action of the drain line which in turn allows build-up to collect in the vent opening. This could, theoretically, eventually block off the vent opening. I'll post something if I can locate.

 

[billy_awesome]

I read somewhere that a crown-vented trap also inhibits the self-scouring action of the drain line which in turn allows build-up to collect in the vent opening. This could, theoretically, eventually block off the vent opening. I'll post something if I can locate.

I believe it has more to do with hydraulic gradient. Water will always find it's own level!

 

[seanny deep]

Lav crown vent? What? Dont you guys have vanity lights here their centered on the fixture so i dont understand.. im always in before electrions why would you run a vent right where a light fixture should be located. A washerbox sure.. i can see that happening kitchen sink is usually under a window? Atleast here so besides that how or why would a professional have ... Or run into this problem? As far as air admittance valves go, they are not a cheater vent for a cheater vent relies on a spring air admittance relies on atmospheri c pressure and differentials between it and the fixture its acting as a vent for hence in orxder for an air admittance valve to work their must be atleast one vent to outside air n the system for it to function correctly. A cheater vent will work, or not work regardless of outside air. Thanks seanny

 

[Tommy plumber]

I read somewhere that a crown-vented trap also inhibits the self-scouring action of the drain line which in turn allows build-up to collect in the vent opening. This could, theoretically, eventually block off the vent opening. I'll post something if I can locate.

Something like this: It states: "vent opening would clog resulting in an un-vented trap."

 

[NYC Plumber]

Lav crown vent? What? Dont you guys have vanity lights here their centered on the fixture so i dont understand.. im always in before electrions why would you run a vent right where a light fixture should be located. A washerbox sure.. i can see that happening kitchen sink is usually under a window? Atleast here so besides that how or why would a professional have ... Or run into this problem? As far as air admittance valves go, they are not a cheater vent for a cheater vent relies on a spring air admittance relies on atmospheri c pressure and differentials between it and the fixture its acting as a vent for hence in orxder for an air admittance valve to work their must be atleast one vent to outside air n the system for it to function correctly. A cheater vent will work, or not work regardless of outside air. Thanks seanny

Yeah your def not a plumber.

 

[rjbphd]

Hey fellow members... when did jnohs become a 'master plumber' on this site?

 

[love2surf927]

what if is as pedistal sink?
than the distance is set by the manufacture.

You do know that your vent doesnt have to center on the fixture.... right, in most cases its better if it does not. Thats what trap arms are for... a plumber should probably know this, just sayin.

 

[GREENPLUM]

It will never happen but if every plumber refused to sell and install crap then home owners and contractors would eventually get the point, so would the manufacturers and distributors.

still just as right as you were in 2009 :thumbup:

 

[422 plumber]

Does that have to be 3 inch at the base of the stack for the laundry in cleveland where I am that would be code

I am facetiously stating that, because I have been unknowingly crown venting for years.

 

[billy_awesome]

In your area, whats the minimum distance from trap to vent?

In Ontario (might be same all across Canada) minimum distance is two waste pipe diameters.

 

[seanny deep]

Same here max is 6' for 1.5" and 8' for 2" 10' for 3" except water closets are 12' emergency 3" floor drains do Not require à vent.. atleast here.

 

[billy_awesome]

Same here max is 6' for 1.5" and 8' for 2" 10' for 3" except water closets are 12' emergency 3" floor drains do Not require à vent.. atleast here.

Yeah so there are some differences, pretty much a foot more in the Canadian National Code. And here floor drains require a vent unless within the 6 feet of the building drain or stack. Ontario still sees floor drains as a non-emergency fixture which is total BS.

Ontario by law, must teach us Ontario code, but we get tested on the national red seal trade examination. No matter where you are in the world code is going to be different in small ways everywhere. By the time they fix problems with our testing I will already be licensed, seems a bit unfair but nothing we can really do about it.

 

[Tommy plumber]

In your area, whats the minimum distance from trap to vent?

In Ontario (might be same all across Canada) minimum distance is two waste pipe diameters.

Hack-tastically speaking, here in hack central, you can be a mile or two from the point of vent. Or in some cases, the vents are optional.

Now for licensed plumbers who follow the code, we are allowed:

 

[U666A]

I think you meant maximum distance......
Hack-tastically speaking, here in hack central, you can be a mile or two from the point of vent. Or in some cases, the vents are optional.

Now for licensed plumbers who follow the code, we are allowed:

No, i think he meant minimum, as per the thread title. Anything less than 2 WPØ's is considered to be crown vented.

The following user(s) wishes to thank U666A for this useful post: Mississippiplum, Plumber71, DesertOkie

 

[Tommy plumber]

My bad, I forgot what thread I was posting in......:laughing:

I jump around alot.

 

[walker426]

In your area, whats the minimum distance from trap to vent?

In Ontario (might be same all across Canada) minimum distance is two waste pipe diameters.

We don't have a minimum from trap to vent the maximum is 5 foot

 

[U666A]

My bad, I forgot what thread I was posting in......:laughing:

I get around alot.

T,IFIFY... :LAUGHING:

The following user(s) wishes to thank U666A for this useful post: Mississippiplum, Plumber71, DesertOkie

 

[suzie]

I have a bunch of brand new one of these darn things that were in a large auction bid I won. If anyone of yuse guys want these things let me know you can have em otherwise I will throw at the end of the month

 

[Tommy plumber]

I believe it has more to do with hydraulic gradient. Water will always find it's own level!

This is what I was referring to. The theory that a crown-vented trap could, in theory, allow debris and waste to settle up in the vent eventually closing the vent intake.