Hissing Pendolinos?

dogof2head · #1 6th January 2009, 11:38

Hi all,

Only my 2nd post - so i beg forgiveness if this has been covered many times (i couldn't see any reference to 'hissing pendolino' in the search), is in the wrong place or is just a plain silly question!

When travelling on the London - M'cr Pendolino, usually in the quiet coach, occasionally there's a weird hissing sound emanating from the corner where the WC is. It kind of goes 'Tsssstss tsssstss tssstss' pause, and then may or may repeat itself. It sounds like it could be some kind of air-freshener, but doesn't seem to correspondend to the WC being used, and i can't smell any 'pine freshness' in the air.

And it's really bugging me! Anyone know what it is?

Cheers all!
Dog.

Deathbyteacup · #2 6th January 2009, 18:01

I think it's probably the Air Conditioning unit, which I think has some of it's systems located near the bog's (much to people's dismay), but that's just a guess.

martin adamson · #3 6th January 2009, 20:12

Quote:

Originally Posted by dogof2head

Hi all,

It kind of goes 'Tsssstss tsssstss tssstss' pause, and then may or may repeat itself.

And it's really bugging me! Anyone know what it is?

Cheers all!
Dog.

I think that sound is when it is being flushed. I am usually in coach A when onboard a 390, and with the toilet not far away, that sound always happensjust before someone comes out of there. There is certinately a hissing noise that I think happens three times. Any other noise might have been the drier being used.

**G6 UXU** · #4 6th January 2009, 20:59

Spot on there David, it is the same system that is used on aircraft so I have been told. And I also travel in Coach A when I can. All the best.

Pesmo · #5 6th January 2009, 23:08

I don't think its just Pendo's. I was sitting near the Loo on a class 450 a few days ago and noticed something very similar.

dogof2head · #6 7th January 2009, 12:57

Hmmm i'm sure it happens when no-one's in there - and it doesn't happen everytime someone has flushed (assuming they've flushed :-) ), and you can't hear it inside when you flush.

I'll double check next time!

Mushroom · #7 7th January 2009, 17:43

Quote:

Originally Posted by Pesmo

I don't think its just Pendo's. I was sitting near the Loo on a class 450 a few days ago and noticed something very similar.

That would make sense, they're virtually the same toilets

Squeaky88 · #8 1st August 2009, 21:52

i am often on trains and i'm certain they all do that.

Squeaky88

steam for ever · #9 22nd August 2009, 19:02

Sounds like an air freshener!

You can never really be sure as there is so much to hiss.

There is the WC itself and there is of couse the airbrakes which may be adjusting and may it not be the toilet itself or the person on it!

ha ha

.

Eccles71B · #10 23rd August 2009, 09:46

Here's a possibilty, bearing in mind the loos sit above the bogies, might it be the air suspension adjusting?

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