My water company has offered me a free save a flush bag. You simply put it
in the cistern and it saves a litre of water per flush.
Has anyone had a go with this and does it really work ?
I'm a little wary of free stuff, but this sounds interesting.
Tim ( email@example.com) wibbled on Tuesday 25 January 2011 23:46:
I expect your ballcock has 1 litre of adjustment range :)
Of course, if you already have a 4-5l flush, you'll turn nearly useless into
totally useless for dealing with the Captain's Log...
All it does is occupy approximately 1 litre of space in the cistern thus
reducing the effective volume of the cistern and saving water.
It will work in that it will save you ~1 litre of water per flush,
However, it will make the flush less effective so you may end up having
to flush twice thus actually use more water. If you have a large, old
cistern it may be worth it but if you have a modern small cistern I
would not recommend it.
Lowering the float will significantly affect the flushing, far more than the
same amount of reduction via a brick etc.
In '76 all our flushes at work were 'adjusted' and the water useage
increased due to double flushing and clearing blockages. Some of the flushes
wouldn't. Later, the water was returned to the correct height and
displacement used and that did reduce water useage.
As with a lot of things, initial idea is good but in practice it's bad.
Modern toilets already use less water and so have a less effective flush as
we found out recently. New Year's Eve we woke up to discover a blocked
drain. Kitchen was flooded and human waste had made its way through the
dishwasher, sink etc.
We have no kids so no-one had flushed anything that shouldn't have been
flushed. When the drain guy used his high pressure jetting equipment to
release the blockage, it appeared to be a ball of toilet paper that was the
cause of the problem. Without going into too much detail, let's just say
that at the time I was suffering from something that necessitated the use of
quite a lot of loo roll in one go. A combination of loo roll that was a
little harder (and so didn't break down as easily) than our normal one,
increased quantity of it in the pan, and an 'eco-friendly' small amount of
water for the flush all combined to block the drain.
Your bag will work to save water - but do you really want to?
In article , firstname.lastname@example.org says...
Trouble with adjusting the float is that the top of the water is lower -
which makes it harder to get the syphon started, or if it's the more
recent drop-valve sort, lowers the initial flow rate which leads to
Decreasing the volume of the tank has neither of these drawbacks -
though as others have noted, the volume may be insufficient anyway.
Personal experience? I've used a Hippo bag for years in one of our
toilets and never had any problems, though it's gone now as the new
cistern had a lower volume anyway.
I have a 20-year old cistern, and a full flush uses quite a lot of
water. I did look at changing the cistern but it didn't remotely add up
on cost grounds e.g. to a dual flush. My water bill (metered) is only
about £200/yr and it's got make at least some sense in money terms to
change the cistern.
I do have a Bog Hog (plastic bag) and a plastic bottle filled with water
in the cistern. I feel they are very helpful. I also have a Variflush
which I reckon make a big saving.
The "if it's yellow, let it mellow..." is also popular here.
I haven't (happily/yet) had problems with blockages due to reduced
flushing; however, I periodically flush the toilet continuously with
three buckets of rainwater (via the cistern before it empties to make it
continuous) to ensure that any blockages that might be thinking about
developing are discouraged.
I happen to think it's a terrible waste of water & resources to use
water purified to drinking standards for flushing the toilet. I did
look into a rainwater harvesting system about 8 years ago, but the cost
of putting such a system into an existing house (as opposed to a new
build) was prohibitive.
In article ,
I concur with everything that Allan says above: we do exactly the same
(ours is called a Hippo or summat), and for the same reasons, and with
the same success.
We actually have two toilets: not only was it not really worth
installing a Hippo in the newer toilet, but I couldn't satisfactorily
fit it into the cistern; however it has worked very well (along with a
filled plastic bottle as well) inside the old toilet's cistern -- for
about 10 years now.
In article , geoff
Good point, offensively made, true to your sig.
The point about a brick, however, is that it's impossible to fit one in
your cistern (unless you smash it up first). These bags can be slid in
nicely. (And so, btw, can slim plastic drinks bottles, filled with