Design Con 2015
Breaking News
Comments
Oldest First | Newest First | Threaded View
Page 1 / 4   >   >>
Michael Dunn
User Rank
Manager
Toilet
Michael Dunn   5/29/2014 1:21:24 PM
NO RATINGS
Now if I could just figure out why one (and only one) of my toilets "sucks out" after flushing until there's an air gap in the bowl...

 

Michael Dunn
User Rank
Manager
Solderless breadboard
Michael Dunn   5/29/2014 1:24:18 PM
NO RATINGS
I have no issues soldering pipe (though yeah, it's gotta be dry)! But I now use other methods whenever feasible. Compression fittings are great. And there's a newish system called Sharkbite (I think) where fittings just press on. Sweet!

 

Crusty1
User Rank
CEO
Re: Toilet
Crusty1   5/29/2014 1:36:16 PM
NO RATINGS
Your problem is there should be an air bleed, if one toilet outflow is above another. Is there a breather pipe above the sewer pipe, it helps to stop the ball of water sucking.

Michael Dunn
User Rank
Manager
Re: Toilet
Michael Dunn   5/29/2014 1:54:45 PM
NO RATINGS
I've thought it might be related to venting, but could never figure out exactly what the problem was (or as Glen might say, the equivalent circuit). There are two vents on the roof...

Can you explain exactly where the breather needs to be, and what is causing the suction?

This toilet is on the main floor – there's one above and one below, which don't have this problem. Also, nothing affects the slow, steady suckout of the afflicted bowl (takes a couple minutes). I can flush other toilets and run other water – no impact on the current sink..., uh, current bowl.

 

zeeglen
User Rank
Blogger
Re: Toilet
zeeglen   5/29/2014 7:08:22 PM
NO RATINGS
@Michael There are two vents on the roof...

Maybe there should be a third vent that never got installed.  Or maybe one is clogged by a bird nest or dead squirrel.

Still remember seeing a schematic for a (Tek?) scope that showed a little cartoon image in the margin beside a BNC connector.  The image was a wash basin on the outside of a small shack.  The draftsperson had a sense of humour, the connector was labelled "external sync".

Crusty1
User Rank
CEO
Re: Toilet
Crusty1   5/30/2014 3:08:09 AM
NO RATINGS
It's an interesting problem especially if the upstream and down stream bowls do not cause the problem bowl to suck or rise and fall.

I do not sure there is the equivalent of a syphon, in an electronic circuit? I am sure there is someone out there that can say there is.

I had this problem once on a house I refurbished, turned out that the bowl was the problem the geometry of the the P or S outflow from the bowl was that the outfall side was slightly lower than the standing water height in the bowl should be, and thus it sucked.

If you have a cheap e-bay USB waterproof camera "enderscope" you might be able to see what the inside of the pipe is like on the affected bowl and outflow.

 

David Ashton
User Rank
Blogger
Re: Toilet
David Ashton   5/30/2014 4:36:03 AM
NO RATINGS
Hi Crusty.....  "I do not sure there is the equivalent of a syphon, in an electronic circuit? I am sure there is someone out there that can say there is."

Nice challenge!!  How about a diac or a thyristor in a Capacitor-Discharge Ignirion or photoflash circuit?  The cap represents the bucket of water, which will not be drained unitl the diac reaches its breakdown voltage (ie the level of the water is high enough, like an automatic toilet flush) or the thyristor is triggered (ie the syphon is primed) ??

Crusty1
User Rank
CEO
Re: Toilet
Crusty1   5/30/2014 5:21:53 AM
NO RATINGS
Hi David: Near but not quite I think.

The syphon automatically stops when both input and output are the same level in height, if we consider an S bend syphon, so to say.

I think we have to add the electrical equavilant of barometric pressure on both sides of the syphon in our wish to show this plumbing as a circuit.

Do you think Max might take up the challange and write an electronics stater manual for plubmbers?

Did you see Jacks new FPGA board on Kickstarter, I like it a lot.

tmiller11147
User Rank
Rookie
Plumbing problem
tmiller11147   5/30/2014 2:40:05 PM
NO RATINGS
Sure hate to tell you this but that pin hole may be due to acidic water. You might get it tested to see if the pH is below 7.2 or so. The acid etches away the inside of copper pipe. If that is so, I would expect you will have more leaks in the future.

 

zeeglen
User Rank
Blogger
Syphon
zeeglen   5/30/2014 3:07:30 PM
NO RATINGS
@David or the thyristor is triggered (ie the syphon is primed) ??

Good analogy, and if you include a resistor and discharged capacitor as the thyristor load, the charged capacitor will discharge into the other capacitor. When the levels (voltage) equalizes the current will stop flowing, just like a real syphon.

Page 1 / 4   >   >>


Most Recent Comments
Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
<b><a href=Betajet">

The Circle – The Future's Imperfect in the Present Tense
Betajet
5 comments
The Circle, a satirical, dystopian novel published in 2013 by San Francisco-based writer Dave Eggers, is about a large, very powerful technology company that combines aspects of Google, ...

Max Maxfield

Recommended Reads From the Engineer's Bookshelf
Max Maxfield
34 comments
I'm not sure if I read more than most folks or not, but I do I know that I spend quite a lot of time reading. I hate to be idle, so I always have a book or two somewhere about my person -- ...

Martin Rowe

Make This Engineering Museum a Reality
Martin Rowe
Post a comment
Vincent Valentine is a man on a mission. He wants to make the first house to ever have a telephone into a telephone museum. Without help, it may not happen.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...