Latest Discussions : Plumbing


08:25PM | 04/05/05
Member Since: 04/05/05
1 lifetime posts
My wife and I have recently installed a brand new acrylic bathtub (it's a 3' x 6' whirlpool tub) in an old house we've been renovating. The bath tub is hooked up to a brand new ABS DWV system we installed to replace the old blackpipe and steel. When we emptied the first test fill of the bathtub, there were no leaks, but there was a tremendous racket. Truly horendous! (You could hear it all the way across the house.) The noise is the noise of water draining (a bit like a gurgle), and it starts about 5-10 seconds after the drain is opened. If we let the drain continue to drain, the sound is continuous. If we close the drain and re-open it, it runs silently for the first few seconds and then starts making this noise again. Anyone know what this phenomenon is? Any ideas on how to fix it?


12:12AM | 04/06/05
Member Since: 04/01/05
47 lifetime posts
You have a bad venting problem. This can be corrected by placing a Studor vent in the line as close to the tub as possible. Studor is a brand name and should not be confussed with an automatic plumbing vent or mini vent. The Studor vent can be placed in a tee cut into the line. That will allow enough air to be pulled into the line to improve the flow in the drain. Right now it is air starved and is pulling it through your waste and overflow instead of the vent system. Studor vents are available from any wholesale plumbing distributor and the cost is approx. $20. They are available in the size that you need for that drain. The Studor that you want fits 1-1/2-2". You shouldn't have a problem finding one of these in your local area, but if you do I can ship one to your home UPS. You can contact me at if you want the product or have any other questions. The bath drain for that volume of water should have been increased to 2" when you piped in the tub. That may not have corrected the problem if the venting was still not good enough. Best wishes.. Kerry Bonham Oh, I also can be reached at 410-760-2801 at the office. Above is the link to Studor information.


05:29PM | 02/01/09
Member Since: 01/31/09
2 lifetime posts
Wow.. The other two replies immediately assume you have a venting problem... I'm assuming you had your installation inspected (especially for DWV)

I'm not a plumber, but I am an experienced DIY'er.

I recently installed a 22" tall 30x60 acrylic tub, with a brass/copper drain/overflow combination. The first one I installed was a rear drain type - also referred to as an indirect drain. The tub drain feeds into a T horizontally, and the overflow feeds into the same T vertically.. Then down it goes into the P-trap.

The other type of drain (which I replaced it with, to make things a bit more quiet - which it didn't!) is a diret drain type. The overflow returns back to the drain, similar to many types of vanity sinks. I ended up changing it because my brand new cable drive indirect drain had a manufacturer's defect in it, and had to be replaced..

So anyhow, THE NOISE IS MOST LIKELY NORMAL!!! If you had no overflow, then you'd have no noise. The only thing that strikes me as odd is that there is a "delay" in when your noise starts. Mine starts making noise almost right away when the stopper is open (about 1 second, or less).

Go test a friend's tub.. I did, and I wasn't surprised that ALL tubs with an overflow make noise.

Solution? I've never seen one, but a P-trap on the overflow would probably stop it.. but most likely cause other problems! :)

Lastly, your tub doesn't hold 2,250 lbs of water based on the supplied info.

One US gallon of water weighs 8.35lbs. Assuming the exterior dimension of the tub (which will add up to way more volume than what the tub holds), 36*72*24/231*8.35=1873.8lbs (231ci=1gallon of water).

Your tub probably holds 1400 lbs of water to the overflow, not 2,250 plus the weight of the tub and people as was mentioned.


03:21PM | 02/02/09
Member Since: 01/31/09
2 lifetime posts
so an overflow should never make noise when draining a tub?


08:50AM | 12/20/15
Try this old trick. Go to a craft store and buy two feet of 100% copper chain. Get a Stainless steel toilet chain hook, and crimp small end over chain end. Pull the drain stopper, plug drain with a rag and fill tub. Pull the plug and let the water pull the chain down the drain, carefully place the toilet chain hook over the drain cross. This will not work on drains with an internal stopper.. I.E. You have a strainer over the drain opening, but these type rarely make noise. Size of the chain is close to a toilet chain, we used to use these when they were copper. Only use 100% copper as it won't foul.


11:26PM | 03/08/16
Sylvan....what a douche


09:31PM | 03/14/22
I just tried the chain method posted by BV009846. It really worked! I was very pleasantly surprised to find such a simple solution.

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