Hello today I had a plumber out (through my home warranty company) because when I flush my master bathroom toilet it made a gurgling noise and drained the water from my guest bathroom (and vice versa). The plumber said my house was vented poorly when built so they installed Studor Vents, of course my Home Warranty said they dont cover that and the plumber wanted like $300+ to replace them, but he told me I could just go to homedepot or lowes and pick some up and replace them myself. I went over to Lowes and got 3 of these (http://www.lowes.com/pd_29145-143-82678K_4294820780_40?productId=1081741) Keeney Mfg. Co. Plastic Mini Air Admittance Vent I replaced all the upstairs ones and then got 1 of these (http://www.lowes.com/ProductDisplay?partNumber=24372-143-85539K&langId=-1&storeId=10151&productId=1069119&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1) Keeney Mfg. Co. Plastic Mechanical Plumbing Air Admittance Vent to replace the Kitchen one while I was at it.
My bathroom don't seem to be gurgling anymore and the water isn't lowering from the other toilet now.
My question is do these normally go bad? Is there really much difference between the $25 I got for the upstairs and the $5 I bought for the kitchen sink? I've owned this TH for about 2 years now, but I'm concerned this could be an issue if I'm constantly replacing them.
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