Putting hot water through pressure washer

E90Yaz · 01-03-2010, 03:48 PM

Hi guys, I tried this in my baby Karcher for the first time in the 4yrs i've owned it the other day. And it became quite lethargic and didnt like it. Has anyone tried this before? Are pressure washers not designed to use hot water??

M3-FAST · 01-03-2010, 03:58 PM

I think some are but it says in the spec if they can or can't - you will also pay £600+ for one!

The prob normally lies with the water pressure. Pressure washers need quite a high water pressure and a lot of hot water comes from immersion tanks, etc at lower pressure, hence why yours might have felt lethergic. With a modern pressurised hot water system it 'may' work better?

Mid_West · 01-03-2010, 04:02 PM

My Karcher specifically says not to use hot water. The ones that 'produce' hot water usually have a heater built in them that does the heating and yes, they are expensive.

I335 · 01-03-2010, 04:29 PM

I could be mistaken, but the water running through that machine also plays a role in keeping the pump cool. Running hot water through it will overheat the motor and seriously decrease its lifespan. I'm really guessing here as I'm not absolutely positive but it makes sense. Whoever knows for sure - feel free to correct me.

NFS · 01-03-2010, 05:23 PM

I thing they actually positively pump water through the system. So if you are using cold, then the water flow rate to your property is actually increased while the pump is running. Pumping against the hot water system is going to cause problems IMO.

E90Yaz · 01-03-2010, 08:35 PM

Thanks for all your info guys...I will try and find one that can accept hot water in future!

Dr Dave · 01-04-2010, 03:12 AM

My Stihl cold water washer says NOT to run hot water through it.

A machine to provide hot water will be big and expensive!

dxb335d · 01-04-2010, 04:23 AM

I rekon you have facked it mate

E90Yaz · 01-04-2010, 09:06 AM

Quote:

Originally Posted by dxb335d

I rekon you have facked it mate

NAh its still working fine....Its GERMAN afterall

badwolf340 · 01-05-2010, 02:28 PM

Better off getting HOT pressure washer .I have a King 120 Hot washer,£499 Ex vat,Machine mart do vat free day's.good unit ,use my Karcher fitting's with it ,snow foam gun etc.110 bar pump pressure,cold or up to 70 degree C.
water flow rate 6L/min.4 Ltr fuel tank,1.8 Ltr fuel consumption.

01-03-2010, 03:48 PM	#1
E90Yaz Torque Monster 17 Rep 256 Posts Drives: Porsche 911 Turbo Join Date: May 2009 Location: billericay, essex iTrader: (0)	Putting hot water through pressure washer Hi guys, I tried this in my baby Karcher for the first time in the 4yrs i've owned it the other day. And it became quite lethargic and didnt like it. Has anyone tried this before? Are pressure washers not designed to use hot water??
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01-03-2010, 03:58 PM	#2
M3-FAST Defected to the dark side..... 210 Rep 5,795 Posts Drives: BMW M5 LCi Join Date: May 2007 Location: Stafford, UK iTrader: (11) Garage List 2009 E90 M3 [10.00] 2007 325i M-sport C ... [9.00]	I think some are but it says in the spec if they can or can't - you will also pay £600+ for one! The prob normally lies with the water pressure. Pressure washers need quite a high water pressure and a lot of hot water comes from immersion tanks, etc at lower pressure, hence why yours might have felt lethergic. With a modern pressurised hot water system it 'may' work better?
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01-03-2010, 04:02 PM	#3
Mid_West Second Lieutenant 17 Rep 231 Posts Drives: 335i Join Date: Jun 2008 Location: USA iTrader: (1)	My Karcher specifically says not to use hot water. The ones that 'produce' hot water usually have a heater built in them that does the heating and yes, they are expensive.
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01-03-2010, 04:29 PM	#4
I335 Brigadier General 123 Rep 4,249 Posts Drives: '08 335i Coupe Join Date: Jan 2008 Location: New England iTrader: (11)	I could be mistaken, but the water running through that machine also plays a role in keeping the pump cool. Running hot water through it will overheat the motor and seriously decrease its lifespan. I'm really guessing here as I'm not absolutely positive but it makes sense. Whoever knows for sure - feel free to correct me.
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01-03-2010, 05:23 PM	#5
NFS Major General 275 Rep 9,218 Posts Drives: M340i Join Date: Jul 2006 Location: UK iTrader: (0)	I thing they actually positively pump water through the system. So if you are using cold, then the water flow rate to your property is actually increased while the pump is running. Pumping against the hot water system is going to cause problems IMO.
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01-03-2010, 08:35 PM	#6
E90Yaz Torque Monster 17 Rep 256 Posts Drives: Porsche 911 Turbo Join Date: May 2009 Location: billericay, essex iTrader: (0)	Thanks for all your info guys...I will try and find one that can accept hot water in future!
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01-04-2010, 03:12 AM	#7
Dr Dave Zummerzet Zyder Drinker! 112 Rep 5,541 Posts Drives: '06 330D Le Mans Blue Join Date: May 2009 Location: Somerset iTrader: (3) Garage List 2006 330d M Sport [0.00]	My Stihl cold water washer says NOT to run hot water through it. A machine to provide hot water will be big and expensive! __________________
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01-04-2010, 04:23 AM	#8
dxb335d The Tarmac Terrorist 949 Rep 29,345 Posts Drives: 997.2 GT3 Join Date: Mar 2007 Location: ''Fandango Towers'' iTrader: (3) Garage List 2010 Porsche 997.2 GT3 [9.50] 2003 BMW E46 M3 [6.00] 2007 BMW E92 335D [5.50]	I rekon you have facked it mate __________________ 997.2 GT3
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01-05-2010, 02:28 PM	#10
badwolf340 Private First Class 9 Rep 196 Posts Drives: M4 Join Date: May 2007 Location: SCOTLAND iTrader: (1)	Better off getting HOT pressure washer .I have a King 120 Hot washer,£499 Ex vat,Machine mart do vat free day's.good unit ,use my Karcher fitting's with it ,snow foam gun etc.110 bar pump pressure,cold or up to 70 degree C. water flow rate 6L/min.4 Ltr fuel tank,1.8 Ltr fuel consumption. __________________ harmon kardon ,performance steering wheel,rear spoiler,black grills ,viz pack,heated seats ,sun protection
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