United Airline
Topic Author
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Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 9:51 pm

Hi everyone.

As you may still remember, toilets onboard were flushed by blue chemical in the past. Eg: B 747-200s, B 747 SPs etc.

These toilets are not very strong and in many times, it is hard to flush aways things. Therefore, it is not very hygienic.

From what I have heard, aircraft that go through the 'D' Check will have their 'Chemical Flush' toilets being converted into Vacuum Flush ones. Right?

Does anyone know what airlines still use the old system for their toilets on B 747s?

The Vacuum system is A LOT better.

Also, where are the flushed stuffs being stored? It is not very sensible to store them in a tank under the passenger deck as the temperature there is too low.

Can anyone give me the answer? Thanks a lot!  Smile
 
tim
Posts: 672
Joined: Sun Jun 11, 2000 12:25 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 9:55 pm

Hmmmm.

Go outside for some fresh air.



 
United Airline
Topic Author
Posts: 8769
Joined: Wed Jan 10, 2001 5:24 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 10:01 pm

Hey I am asking in a serious way!  Smile
 
tim
Posts: 672
Joined: Sun Jun 11, 2000 12:25 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 10:04 pm

hehhehe sorry man  Smile/happy/getting dizzy

Also Post this in the Tech/ops forum. They might be able to help you in there aswell.

Regards
Tim
 
United Airline
Topic Author
Posts: 8769
Joined: Wed Jan 10, 2001 5:24 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 10:06 pm

Haahaahaa! Its ok!
 
johnnybgoode
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 11:25 pm

i once read about an incident aboard a SAA A-300 in which a little girl was sucked into the toilet bowl because of a malfunctioning vacuum system. fortunately, she wasn´t hurt but was stuck in the toilet for quite some time.
this is no joke!!! read about it once in a reliable aviation magazine!!!

regards
daniel
If only pure sweetness was offered, why's this bitter taste left in my mouth.
 
TurbineBeaver
Posts: 1511
Joined: Fri Jan 11, 2002 1:50 am

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Mon Mar 12, 2001 11:31 pm

My uncle is a 73G capt and they had to delay for like four hours cuz some guy in First C had his cell phone sucked dowwn adn they didn't wanna take chances and he wanted it back!!!!


TB
 
widebody
Posts: 1107
Joined: Wed Aug 02, 2000 5:08 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 12:28 am

JohnnyBGoode,

The SAA incident was caused by the fact that the girl did not use the toilet seat, and flushed while she was sitting on the toilet. As she was quite a large girl by nature, she formed a seal around the toilet bowl. The aircraft had to drop height in order for her to be released......
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 12:52 am

The SAA incident seems strange because it would require the girl to seal the toilet bowl AND the flush valve to fail open.
 
johnnybgoode
Posts: 2144
Joined: Wed Jan 03, 2001 8:47 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 3:24 am

thanks for the additional info, widebody.

best wishes
daniel
If only pure sweetness was offered, why's this bitter taste left in my mouth.
 
widebody
Posts: 1107
Joined: Wed Aug 02, 2000 5:08 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 5:23 am

VC-10,

Not too sure about your comment, I know it was because of the toilet seat that seal was formed, and that they had to descend to get her off.......isn't there something with the flush valve whereby it will stay open if there is no immediate flow, because it still thinks it hasn't opened........not too sure, just trying to remember back.......
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 6:26 am

The Flush Vlv on both the A340 & the -400 operate on a timer only. They open for 4 secs.
 
SInGAPORE_AIR
Posts: 11619
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 6:48 am

Definately a vacuum flush. It's more futuristic. Also it got rid of my diarrhoea on the SIA 744! I went twice!
Anyone can fly, only the best Soar.
 
widebody
Posts: 1107
Joined: Wed Aug 02, 2000 5:08 pm

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 7:30 am

Dunno is it the same for the A300, they don't even have a manual shut-off valve, do they?
 
SInGAPORE_AIR
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Joined: Mon Nov 13, 2000 4:06 am

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 7:34 am

By the way, it was he Megatop that had the vacuum. The A310 had the stnadard bog water type.
Anyone can fly, only the best Soar.
 
Guest

RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 7:47 am

Actually, there are no mandatory requirements for airlines to replace their 'wet' toilets with vaccuum ones. As each vaccuum toilet costs around US$50,000 - plus the time to remove the old one and install it - you're looking at a very substantial investment per aircraft; something like US$500,000 for a single DC10/L1011/A300.

As for the SAA incident - I remember it as I was living in SA at the time. The girl was indeed rather large and she pressed the flush button whilst still sitting on it. It created a vaccuum, and she was stuck there until the aircraft landed! Very embarassing - and painful - for her ... she was hospitalised as a result.
 
747buff
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 7:49 am

On the subject,I have been wondering this for some time:

Do MD-11s use the chemical or vacuum system for their toilets?
At Eastern, we earn our wings every day!
 
airbus380
Posts: 1575
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 7:58 am

The chemical flush makes your "dump" go sideways and get lodged sideways near the drain. This is no fun.
 
widebody
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 8:47 am

She was only 8 years old at the time, I remember reading the words 'severe internal bleeding'......
 
desertjets
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RE: Vacuum Pump Flush Toilets VS Chemical Flush Ones

Tue Mar 13, 2001 10:27 am

Just a quick question for y'all...

Now if you lost something down the toilet, say your cellphone like the story Turbinebeaver told... wouldn't you just say fuck-it and not make a big deal about going after it? Afterall these things are pretty cheap anyways and it would most likely be broke if not disgusting to use afterwards. Just think of it as a freegift for the next fellow who services the lavs.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia