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Old 05-11-2018, 10:16 PM   #1
tomstephens89
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Hose Pipe / Flow Rate for Pressure Washers

Hi all, forgive me for this sad, and probably pointless post but when my minds pondering, I have to find the answer to these questions....

Anyway, I am awaiting delivery of a shiny new Kranzle K10/122TS pressure washer to replace my 2 year old Karcher K7 Compact.

Water consumption is 10L/min which is the same as my Karcher apparently, however for as long as ive owned the Karcher, it occasionally seems to 'stutter' somewhat. However this stuttering is usually only shortly after its been turned on and it eventually settles down.

I have no idea of the cause but it got me thinking about my water supply situation...

I have 1 outside tap at the rear of the house, so I run a 30m length of Hozelock 1/2" Ultimate Hose round the side of my house and leave the other end hanging on a hook by my garage door. Now reading online some panic set in about water supply pressure and loss over distance with hose pipes.

Could those hiccups with my Karcher be due to not enough water flow I thought? In which case I wasn't going to be able to use my Kranzle :-(

So.... A quick test soon put my mind at ease...

Get a big jug/container and fill with the outside tap full open for 6 seconds. Measure how much water I got and multiply that by 10 to get the flow rate in LPM.

In my case, at the tap im getting 25L/Min, beastly good pressure in my village

Now I measured at the end of my 30m hose, which is where the pressure washer will connect and..... 22L/min.

Kranzle requires 10 so I am all good until the cows come home, and back.

Anyway, I just thought i'd share this info as in area's with low pressure at the tap, a long hose could result in a sufficient drop in flow that end up with you causing damage to your expensive ass pressure washer.

Something to bear in mind, or am I just sad?
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