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Old 07-23-2015, 07:31 PM   #71
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I think hack is a little strong. Everything looks plumb a supported properly. BC is a Ma guy like me and he knows how stringent our code is. Your correct if it's legal there plumb on. It's just funky to look at that's all.
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Old 07-23-2015, 08:13 PM   #72
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Back to the original post.

The work looks okay,it's functional and will get the job done. As other stated I would have used strut rather than split rings. Personally not how I would have done it, it lacks planning. It looks more put it together as you go and make it work.
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Old 07-23-2015, 09:02 PM   #73
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Well now yer picking at a scab! If it meets minimum code, then it's ****ING code!!!! In your mind it's hack. It doesn't mean it's not legal. This is the **** that got me going about Cuda's post. You guys don't make the ****ing rules. Just shut up and work under yours!!!! Don't you question, for one second, the world I work in & the rules I adhere to. Hack This Cuz!!!!!
Little sensitive are we? I never called you a hack. What you did looks neat, but it wouldn't fly around here. Your code is different than mine. I think the code of over sizing a drain to get away without a vent is hack. I understand the science behind it but I don't agree with it being done in the long run.
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Old 07-23-2015, 09:11 PM   #74
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Where's the solder? Kids gots it waaaay too easy nowadays.
Don't worry in 30 years we will be replacing all the pro press fittings that are leaking.
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Old 07-23-2015, 09:15 PM   #75
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So what would your preferred install be? Combie's, or sanitary T's on their side, all on the horizontal plane?
Here in CT (ipc) I would have vertical San tees at each lav with independent vents going to a common vent. Yours looks funny to me, but hey we are all from different parts of the country and or world.
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Old 07-23-2015, 10:03 PM   #76
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Ok the definition would be when the vent is below the weir of the trap. You can do anything that meets code there but here it still wouldn't meet code the systems similar to that require 2 in riser because of buildup. We do something similar to this scotch bare with me I did it in ten seconds wile bidding a job.
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Old 07-23-2015, 10:18 PM   #77
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2 times the pipe diameter is the rule for the minimum distance of the trap arm to the vent to prevent from being a crown vent, as Wyrick stated. It has nothing to do with s-traps.

If the trap arm is too long it will become an s-trap because the centerline will be above the top of the inlet to a santee being you must have 1/4" per foot fall on the trap arm. Those lavatories all have s-traps which according to IPC and UPC are non compliant. Weird that philly would allow it.

The reason its non compliant is that the trap has the potential to siphon itself out like a toilet if the conditions are right. I've never seen a code allow S-traps in anything other than toilets and urinals where they're integral traps that are replenished with a fill valve after siphoning.
Technically the IPC allows for S-traps in the CDV systems for restrooms
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Old 07-23-2015, 10:24 PM   #78
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And I'll reiterate that the pipe is up sized one size. Please demonstrate to me where an 1 1/4 fixture discharge will ever be capable of filling that larger pipe, barring a blockage. Therefore, there will always be venting ability.
So what you installed would be considered a combination drain & vent system under the IPC and would be allowed in most cities in Texax.
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Old 07-23-2015, 10:27 PM   #79
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pic of a CDV system
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Old 07-24-2015, 04:57 PM   #80
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pic of a CDV system
I totally forgot about those. Yes, that concept makes sense. Upsizing the trap arm would help prevent from it siphoning. I've just only ever seen floor drains and kitchen drains using the CDV systems, not lavs. And typically on kitchen drains utilizing a CDV system the traps are sub slab.. I didn't think about lavs and using them above ground.
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