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Vacuum Pump Flush Toilets VS Chemical Flush Ones  
User currently offlineUnited Airline From Hong Kong, joined Jan 2001, 9181 posts, RR: 15
Posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 1377 times:

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

19 replies: All unread, jump to last
 
User currently offlineTim From Australia, joined Jun 2000, 705 posts, RR: 3
Reply 1, posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 1336 times:

Hmmmm.

Go outside for some fresh air.





User currently offlineUnited Airline From Hong Kong, joined Jan 2001, 9181 posts, RR: 15
Reply 2, posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 1329 times:

Hey I am asking in a serious way!  Smile

User currently offlineTim From Australia, joined Jun 2000, 705 posts, RR: 3
Reply 3, posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 1324 times:

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


User currently offlineUnited Airline From Hong Kong, joined Jan 2001, 9181 posts, RR: 15
Reply 4, posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 1316 times:

Haahaahaa! Its ok!

User currently offlineJohnnybgoode From Germany, joined Jan 2001, 2187 posts, RR: 6
Reply 5, posted (13 years 6 months 3 weeks 3 days 19 hours ago) and read 1307 times:

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.
User currently offlineTurbineBeaver From United States of America, joined Jan 2002, 1199 posts, RR: 0
Reply 6, posted (13 years 6 months 3 weeks 3 days 19 hours ago) and read 1298 times:

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


User currently offlineWidebody From Ireland, joined Aug 2000, 1152 posts, RR: 8
Reply 7, posted (13 years 6 months 3 weeks 3 days 18 hours ago) and read 1290 times:

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......


User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 8, posted (13 years 6 months 3 weeks 3 days 17 hours ago) and read 1281 times:
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The SAA incident seems strange because it would require the girl to seal the toilet bowl AND the flush valve to fail open.

User currently offlineJohnnybgoode From Germany, joined Jan 2001, 2187 posts, RR: 6
Reply 9, posted (13 years 6 months 3 weeks 3 days 15 hours ago) and read 1254 times:

thanks for the additional info, widebody.

best wishes
daniel



If only pure sweetness was offered, why's this bitter taste left in my mouth.
User currently offlineWidebody From Ireland, joined Aug 2000, 1152 posts, RR: 8
Reply 10, posted (13 years 6 months 3 weeks 3 days 13 hours ago) and read 1227 times:

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.......


User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 11, posted (13 years 6 months 3 weeks 3 days 12 hours ago) and read 1215 times:
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The Flush Vlv on both the A340 & the -400 operate on a timer only. They open for 4 secs.

User currently offlineSingapore_Air From United Kingdom, joined Nov 2000, 13744 posts, RR: 19
Reply 12, posted (13 years 6 months 3 weeks 3 days 11 hours ago) and read 1207 times:

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.
User currently offlineWidebody From Ireland, joined Aug 2000, 1152 posts, RR: 8
Reply 13, posted (13 years 6 months 3 weeks 3 days 11 hours ago) and read 1195 times:

Dunno is it the same for the A300, they don't even have a manual shut-off valve, do they?

User currently offlineSingapore_Air From United Kingdom, joined Nov 2000, 13744 posts, RR: 19
Reply 14, posted (13 years 6 months 3 weeks 3 days 11 hours ago) and read 1192 times:

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.
User currently offlineCeilidh From , joined Dec 1969, posts, RR:
Reply 15, posted (13 years 6 months 3 weeks 3 days 10 hours ago) and read 1185 times:

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.


User currently offline747buff From United States of America, joined Jan 2001, 742 posts, RR: 0
Reply 16, posted (13 years 6 months 3 weeks 3 days 10 hours ago) and read 1185 times:

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!
User currently offlineAirbus380 From , joined Dec 1969, posts, RR:
Reply 17, posted (13 years 6 months 3 weeks 3 days 10 hours ago) and read 1179 times:

The chemical flush makes your "dump" go sideways and get lodged sideways near the drain. This is no fun.

User currently offlineWidebody From Ireland, joined Aug 2000, 1152 posts, RR: 8
Reply 18, posted (13 years 6 months 3 weeks 3 days 9 hours ago) and read 1160 times:

She was only 8 years old at the time, I remember reading the words 'severe internal bleeding'......

User currently offlineDesertJets From United States of America, joined Feb 2000, 7780 posts, RR: 16
Reply 19, posted (13 years 6 months 3 weeks 3 days 8 hours ago) and read 1146 times:

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
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