In article <6807dbb5-5534-433b...@googlegroups.com
> Just found this somewhere:
> The machine's flexible hose is for disposing of waste water. It must disc
> harge into a waste pipe or trap above the level of the top of the drum. The
That's not quite true - it must be looped up above the max fill level.
The discharge point can however be lower.
> option is to hook the hose into the top of an open standpipe with a P-trap
> and the bottom. The waste pipe should through the outside wall to a hopper
> head or gully. An air gap at the top of the standpipe is important to stop
> back-siphonage of dirty water into the machine.
True, and pushing the hose in too far so the end is under the u-trap
water level is not good.
> Manufacturers will recommend that you use a standpipe and insurers and wate
> r companies often insist on it being in place. But if you find it easier to
> position your washing machine next to a sink you can change the sink trap
> to a washing machine trap, saving space.
> 1. Whats this bit about insurance companies and manufacturers wanting a sta
> nd pipe ?
No idea. What makes you think that what you found has any validity?
> 2. The washing machine outlet must discharge at a level higher than the dru
> m ?
> My washing machine pipe is formed into a U to create a trap, then straight
> into a soil pipe via one of those 4-way waste manifolds. Much lower than th
> e drum all the way, and no problems.
The pipe must loop up higher than the highest water level in the drum
(plus a margin), or the machine won't be able to fill to that level,
as it will run out the waste pipe. The highest water level in the drum
is always below the drum centre (the drum bearing seal is not designed
to be submerged). The highest fill levels tend to be the rinses, and
on some machines, the wool wash program (since woollens mustn't be
repeatedly lifted out and dropped back into the water).
Washing machines don't close off the waste pipe, they rely on having
to pump over a raised section of the pipe when they need to empty out.
> Is this info rubbish, or is there something I should know about ?
There's some truth to the info, but it's not a good complete
Your setup cannot be as you describe, as the machine would never fill.
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