On Sun, 24 Apr 2016 08:55:20 +0100, Stephen
<re...@to.newsgroup.invalid> wrote:
>On Thu, 14 Apr 2016 11:08:27 +0100, T i m <
ne...@spaced.me.uk> wrote:
>
>>I would say that suggested there wasn't enough back-pressure (from the
>>patio head) and that might also explain why it doesn't spin (not
>>enough pressure at the head to get the thin moving)?
>>
>>As I think I understand you bought the head separately from the PW,
>>maybe it's just not suitable (designed for a more powerfully PW)?
>>
>
>I think it was one of their [Wickes'] best pressure washers so I don't
>think it is a case of it not being powerful enough.
The thing is I'm not sure if *any* domestic / electric pressure
washers would be considered good / powerful enough for some people
(professionals) or uses. I'm not saying there aren't any units that
are considered 'ok', just that they are often much more expensive than
anything you would find in one of the sheds.
So you get 'domestic' rating (pressure / flow rate) which are often
like 'peak music power' ratings for amplifiers (eg, vastly
overestimated or basically lies) and you generally get the 'real'
ratings on the more professional stuff.
A similar thing to pressure washers is air compressors and you would
be surprised how big (and expensive) you actually have to go before
you can do anything serious. I have a direct drive 50l twin cylinder
compressor that is marked as 8 bar and 15 cfm but it's pathetic
compared with my mates 3 phase jobby. Mine is 'ok' of course for some
things (like inflating tyres or dusting off small items) but try it on
a shot blasting cabinet or air chisel and it would struggle.
> I think it must be
>the nozzles are too big, which would then cause the loss of back
>pressure you describe?
If the patio head was one designed to go with basic / 'domestic'
pressure washers then there is no reason it shouldn't work with a
reasonable one. However, as mentioned above, I think they are one of
those things that may 'test' the abilities of PW's in general. If you
are using a lance to say clean a patio you can go as slow and stay as
close as you want to manage the actual cleaning power.
http://wiki.diyfaq.org.uk/index.php?title=Pressure_washer_FAQ#Pressure_.26_Flow
With a rotating head cleaner, if there isn't sufficient 'cleaning
power' it may not work very well or not work at all and you the user
don't have any impact over that. ;-(
Cheers, T i m