Greeting! I need some advice on my basement wet bar plumbing. I'm working on the rough in now and will use 1 and 1/2 inch schedule 40 PVC as the web bar sink drain pipe. The sink is about 7ft away from my utility room where the 4 inch main drain pipe goes into ground sewage (see the red circle in photo). I plan to route the 1-1/2" sink drain horizontally to the utility room and tie in to the main drain (the black line). I will use an a[color=#222222]ir admittance [/color]valve at the sink to protect the p-trap from being syphoned. I went to homedepot and found two fittings (wyv vs a tee) that might work for me. Here are my questions: 1. Is it even allowed to tie the sink drain to the main line like this (I want a bar sink but definitely don't want all the "junks" leaving the house to possibly get in the sink since it is at the basement)? 2. If Q1 is yes, then should I use a wyv or a tee fitting to tie in my sink drain? If Q1 is a no no, then I'd have to use a drain pump. Thanks for your input! [b] [/b]

I got a weird one here, we moved into a house where we are now on well water. I would say I have water hammering that's occuring, maybe my pressure tank is set to high? Here are my issues One of the toilets near the front of the house and directly above the pressure tank, the copper lines do bang alot every time I flush the toilet, I think I need to install a 1/2 water hammer arrestor on the line. Dishwasher also bangs banging everytime when we use it. New reno bathroom seems to be fine Master bathroom is where is weird, toilet bangs multiple times but only happens once. For instance, it bangs on the first flush in the morning only, it is the longest run. I notice under our bathroom is the furnace room so I see all the plumbing, they ran a 3/8 to a reducer 1/2 and then it tees off, I thought I found the banging noise because the 1/2 copper line going to the toilet was hitting a 2x4, I put some foam and it seems to get better but it's still there. Im wondering if the water pressure is set to high in the house, they made their own water hammer arrestor coming from the pressure tank but I would assume it should be pointing up and not down?