MJBaldwin Posted June 22, 2016 Share Posted June 22, 2016 alright guys I put a new sink in and re did a little plumbing had some galvanized I removed back to the old main (old house = fun issues) so here's the deal I added a disposal and an air admittance device. Issue is when I drain stuff I feel like it fills up the disposal and drains slow if not backs up on the non disposal side? Any thoughts I checks and the waste from disposal pitches to the stack. Just can't pin point this! See pics any suggestions would be great Quote Link to comment Share on other sites More sharing options...
Surface Tension Posted June 22, 2016 Share Posted June 22, 2016 Lets assume your trap isn't full of large particles from the disposal. Slow drain and what appears as the other other basin filling. Your getting Positive Pressure. If the sink were vented to a stack there couldn't be any positive pressure. The AAV is a one way valve operated by gravity so there is not relief of positive pressure. Look for restrictions in the waste line and venting for the culprit. Rick 1 Quote Link to comment Share on other sites More sharing options...
Moon Lake Refuge Posted June 22, 2016 Share Posted June 22, 2016 Agree, sounds like venting, found out one side of my sink isn't vented. And yes I have two separate drain lines running to my kitchen sink for some reason... Quote Link to comment Share on other sites More sharing options...
MJBaldwin Posted June 22, 2016 Author Share Posted June 22, 2016 Before I didn't have a vent and no issues although no disposal. Now I add this AVV and seems to back up? Just not 100% I did check the trap the other day but nothing is in there like I said just installed it this weekend Quote Link to comment Share on other sites More sharing options...
Moon Lake Refuge Posted June 22, 2016 Share Posted June 22, 2016 These may seem like no brainers but cant see so have to ask, does your drain run vertical to at least 6 inches above your sink without a horizontal bend? How high does it go? How many 90's? Does it vent any other fittings before the main vent? Quote Link to comment Share on other sites More sharing options...
MJBaldwin Posted June 22, 2016 Author Share Posted June 22, 2016 It does the 90 other the sink cabinet where the escutcheon is then runs horizontal about 4-5' then does another 90 into an older cast iron main (no its not backed up as my wife uses the tub and shower and don't have any issues). That 22.5 degree angled pieces are for the AVV vent. It will drain eventually just not as quick as it should fills the disposal up then will slowly drain. So i know something is not right. But then the funny thing is then it worked for a little while no issues. Now back to the slow draining again while filling up disposal? I just cannot pin point this issue and driving me nuts! Really dont want to call a plumber if not needed. Quote Link to comment Share on other sites More sharing options...
Moon Lake Refuge Posted June 22, 2016 Share Posted June 22, 2016 May be an issue specific to the disposal. Have you call the manufacturer? I found out awhile back that a lot of time they have the answer or can get you close. May be an issue there. How long did it work for? Draining the sink one time? For a day or week? Just curious if someone else was showering or using a fixture at the same time altering the pressure somehow? Quote Link to comment Share on other sites More sharing options...
MJBaldwin Posted June 22, 2016 Author Share Posted June 22, 2016 i have not contacted them but maybe i will? conditions were the same. I have only had it installed since Saturday. Its not bad if i dont have water full blast and use for a short while. Quote Link to comment Share on other sites More sharing options...
Surface Tension Posted June 22, 2016 Share Posted June 22, 2016 Hmm,. Did you replace the basket or tailpiece? I've seem some that are junk and way too restrictive. Did you change the size drainpipe to a smaller diameter? Could be a larger drain pipe was used to in order to not sipon the trap being as there was no vent. Something that was done years ago, and it worked. Quote Link to comment Share on other sites More sharing options...
delcecchi Posted June 22, 2016 Share Posted June 22, 2016 What happens if you turn the disposal on? Quote Link to comment Share on other sites More sharing options...
MJBaldwin Posted June 22, 2016 Author Share Posted June 22, 2016 sink and piping back to the branch is all new. drain size went from 1-1/2" cast to 1-1/2" PVC there was a lot of build up on the existing cast being almost 100 years old. When i turn the disposal on will run but then will start to come back up the non disposal side, and once off will slowly drain down. Quote Link to comment Share on other sites More sharing options...
leech~~ Posted June 22, 2016 Share Posted June 22, 2016 I had a bathroom sink start to drain really slow then just about not drain at all. Took off the trap and it was clear? Snaked out the line and nothing? Went up on the roof and feed the garden hose as far as it would go down the vent pipe and turned the water on full blast. I could hear water backing up and coming back up the vent pipe and when it almost got to the top whoosh! 57 years of leafs sticks, bugs, dead birds and what ever else built up in there cleared up nicely! Bathroom drain works like a charm! RebelSS 1 Quote Link to comment Share on other sites More sharing options...
jmd1 Posted June 23, 2016 Share Posted June 23, 2016 So one thing that pops out is the old pipe was corroded so that would cause a restriction naturally. You replaced up to a certain point with new smooth plastic pipe. Is this new set up allowing more water to go to the corroded pipe that is draining at the same rate as before? You could be pushing more water to that spot and it is backing up into the disposal. I have issues with my sink as the original builder spec'd the house to have the sink in the counter along the wall. The owners wanted the sink in the island, which causes a vent issue. So my sink is an AVV like yours and occasionally will cause issues. I hope you get a solution, there is nothing worse than a slow sink. Jeff Quote Link to comment Share on other sites More sharing options...
MJBaldwin Posted June 23, 2016 Author Share Posted June 23, 2016 Leech, i would consider that although new piping and doesnt go outside vents through the AVV under the cabinet. JMD, It worked fine before i had this disposal and no AVV valve. I took back the original one due to i thought it was a faulty one. Now i am second guessing these things? I have never used one before but seems like it is causing a headache... I would agree might be letting more water down but it doesnt seem to take that long to start backing up turn water on wait a min or two and i can hear that it is going to start backing up. Quote Link to comment Share on other sites More sharing options...
Walleyehooker Posted June 28, 2016 Share Posted June 28, 2016 If the disposal is backing up you may want to check if there is a knock out to punch out. Ill see if I can find a video on this. Quote Link to comment Share on other sites More sharing options...
Walleyehooker Posted June 28, 2016 Share Posted June 28, 2016 Heres the video but after looking again you aren't using the dishwasher Might be more of a venting problem. Quote Link to comment Share on other sites More sharing options...
PurpleFloyd Posted July 2, 2016 Share Posted July 2, 2016 On 6/22/2016 at 5:35 PM, delcecchi said: What happens if you turn the disposal on? The kitchen lights come on. Quote Link to comment Share on other sites More sharing options...
Surface Tension Posted July 7, 2016 Share Posted July 7, 2016 Remove the AAV and see how its drains. leech~~ 1 Quote Link to comment Share on other sites More sharing options...
leech~~ Posted June 7, 2017 Share Posted June 7, 2017 On 6/7/2017 at 6:32 AM, RandyClary said: Plumbing work is a challenging task and it needs a thorough training and experience. Professional plumbers are trained in such a way that they can identify the problem area quickly and work in the right direction. RandyClary, Welcome to the forum. Oddly your Avatar says your from Spokane but your posting ad's for a plumbing company in New Jersey? Or is there a Spokane, New Jersey? Quote Link to comment Share on other sites More sharing options...
Moon Lake Refuge Posted June 9, 2017 Share Posted June 9, 2017 Randy!! Thanks for your timely answer! Quote Link to comment Share on other sites More sharing options...
PurpleFloyd Posted June 10, 2017 Share Posted June 10, 2017 On 6/7/2017 at 6:32 AM, RandyClary said: Plumbing work is a challenging task and it needs a thorough training and experience. Professional plumbers are trained in such a way that they can identify the problem area quickly and work in the right direction. You can take help from youtube videos. When we bought our first house the drain lines were all galvanized and cast iron. The supply lines were galvanized and leaking in many locations. I had never done any plumbing in my life but funds were short so I went to the local Menards and bought a torch , flux, solder, pvc glue and a bunch of pipe and fittings one Friday after work. I started to tear everything out right up to the service Saturday morning knowing I had the weekend to learn how to glue and solder or the Mrs would get pretty grouchy. It was one of the easiest things I ever did. Plumbing is not really much if a challenge at all to be honest for the most part. But you do a good job of making it seem more daunting than it is. Maybe New Yorkers are just a little more slow. cavalierowner 1 Quote Link to comment Share on other sites More sharing options...
DANR Posted June 27, 2017 Share Posted June 27, 2017 On 6/7/2017 at 6:32 AM, RandyClary said: Plumbing work is a challenging task and it needs a thorough training and experience. Professional plumbers are trained in such a way that they can identify the problem area quickly and work in the right direction. My Father-in-law (a master plumber) always used to say you only need to know 3 things to be a plumber: sh*t doesn't run uphill payday is on Friday the boss is an ahole fishingstar and Moon Lake Refuge 2 Quote Link to comment Share on other sites More sharing options...
swamptiger Posted June 27, 2017 Share Posted June 27, 2017 There's a lesson to be learned here.. NEVER, EVER, let your wife catch you at a weak moment, and talk you into installing a garbage disposal unit..... BoxMN 1 Quote Link to comment Share on other sites More sharing options...
leech~~ Posted December 17, 2019 Share Posted December 17, 2019 53 minutes ago, SharonCynthia said: This discussion on plumber is really weird, it really changed my opinion about plumbers. On 6/7/2017 at 6:32 AM, RandyClary said: Plumbing work is a challenging task and it needs a thorough training and experience. Professional plumbers are trained in such a way that they can identify the problem area quickly and work in the right direction. Quote Link to comment Share on other sites More sharing options...
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