When I have the opportunity to improve upon something, I will do it every damn time. The home owner was only concerned about water pipe, not knowing he was looking at years worth of problem drainage down the road. An AAV on a new build?? There better be a damn good reason. If you can't get a vent up through the roof, island vent it. AAV is the lazy way out, this isn't a renovation!
I do not mean to offend anyone with my comments. But if I was talking to the plumber, I would have some questions for him
Hey Matt30,
At the risk of getting into the dreaded "Internet Argument" I would just like to say that getting the facts is always the better way before slamming other people and making the owner feel bad about their choice of trades or builder.
Yes, you are right, AAV is not normally the correct way of designing a plumbing system from new. However, that being said, in my trailer there are 3 AAV's as the walls are too thin to run any drainage in the walls, it all goes underneath so it has only one area in the back to run a roof vent. Roboj had mentioned that this is a park model RV, so to me it sounds like they might be facing the same issue. You cannot run 1-1/2" pipe through a 2x4" wall horizontally (Which by the picture I assume is the case) without compromising structural integrity. therefore it would need to go straight up creating unsightly bulkheads at the top plates. So unless you want 3-4 roof vents (depending on the number of fixtures) then an AAV is the only way it can be done.
Now I realize this is all speculation because, again I dont know all of the facts so please take my theory with a grain of salt.
But your statement of having the "Opportunity to improve upon something" is telling yourself that you are right and convincing the owner that you are right without even knowing the full scope or rational thought process behind it. I see guys like you come onto the job site every day of my life, slamming other painters, slamming other electricians, slamming other framers and so on without even looking at the full job, yet when they go to fix it, is done poorly in a different way.
I am not standing up for the workmanship here, like I said before, it is not the way I would have done it, but who knows why it was done this way.
To properly assess the problem, I would want to see multiple pictures, from far away and close up, and possibly even an ISO sketch of what was happening. Were there changes in the plan? or was it planned right from the start. I see a cold water T-off at the sink, what is that for? not a typical spot for a line like that, is there an icemaker or did they take the water off the cold for the dishwasher by mistake instead of from the hot?
Anyways, my point is Matt30, that I do appreciate that it sounds like you know what your talking about, but please simmer and ask the right questions first
As mentioned before, It cheapens our industry and makes it seem like we're all shady.
Thanks, and good luck Roboj
Let us know if you have any more questions
