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pressure washers
Posted by: (
Date: November 10, 2006 06:00PM

Has anyone had any experience of using the domestic pressure washer (for cleaning patios, muddy vehicles etc.) as a feed pump for a boiler? Perhaps I should say used the pump out of such a machine. I understand that they are usually 3 throw positive displacement type with pressure capability in excess of 1000psi.
Presumably they have a reduction gearbox drive from a standard 1400rpm induction motor and don't turn at that speed. But I wonder if they can take continuous service in a vehicle application since they are presumably designed for very intermitent use. If anyone has dismantled one or used one as a feed pump I would be interested to hear their comments.


Edited 1 times. Last edit at 11/10/06 06:02PM by Jack.

Re: pressure washers
Posted by: Jeff Theobald (Moderator)
Date: November 11, 2006 03:36AM

Hi Jack,

Yes they are very successful, as a feed pump, being originally designed to rotate at 1400 rpm, when adapted to a boiler feed pump they only need to rotate at about 1/3 of your steam engine speed, making them capable of years of use.

When I have used these pumps, I look for the better quality pumps made with a bronze body, stainless valves, and a good body shape, not the type that bolts to the nose of the driving motor.

Hope this helps, Jeff.

Re: pressure washers
Posted by: (
Date: November 11, 2006 04:51PM

Thanks Jeff,
I only needed a small nudge to go and buy one. I will take your advice and get a decent quality one.


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