Chuck Richard
New Member
what products have you had success with?
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i need to descale
- Thread starter Chuck Richard
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Clean County
New Member
What are the signs that let you know when it is time to descale??
In 3 yrs that I have owned a Hotwater Powerwasher I have never Descaled it so I don't know what chemicals to use.
In 3 yrs that I have owned a Hotwater Powerwasher I have never Descaled it so I don't know what chemicals to use.
Chuck Richard
New Member
well my signs are that when using hot water sometimes when i stop spraying for a few minutes the start again the water comes out black for a few minutes. nasty looking stuff.
Mark
Moderator / Sponsor
Richard,
Scalemaster is a good product for the do it yourselfer.
We typically use a special descaling acid, which we circulate through the heating coils using an acid pump driven by a 2 HP electric motor.
Usually black nasty looking stuf coming out of the heating coils is not a sign of scale build up, but of something else, check your inlet pressure between pump and coil, and then the outlet pressure between the coil outlet and hose / hose reel, if the pressure fifference between the 2 places exceeds 250 I would descale.
The black stuff coming out of the gun, could actually be several things, the first that comes to mind is that the inner tube of your hose is detiorating due to overheating?
Has the burner ever stayed on whil trigger was closed?
What other than water do you run through your heating coils?
Scalemaster is a good product for the do it yourselfer.
We typically use a special descaling acid, which we circulate through the heating coils using an acid pump driven by a 2 HP electric motor.
Usually black nasty looking stuf coming out of the heating coils is not a sign of scale build up, but of something else, check your inlet pressure between pump and coil, and then the outlet pressure between the coil outlet and hose / hose reel, if the pressure fifference between the 2 places exceeds 250 I would descale.
The black stuff coming out of the gun, could actually be several things, the first that comes to mind is that the inner tube of your hose is detiorating due to overheating?
Has the burner ever stayed on whil trigger was closed?
What other than water do you run through your heating coils?
oguard
New Member
Signs you need to descale are reduced flow and therefore hotter water, contantly plugged tips (water shooting in all directions), and/or a real pressure differential between the head of the pump and the outlet of the coil. If your water supply is from a hard rock well then odds are you will have high disolved mineral salts (hard water); sources from most lakes and rivers tend to be naturally softer. Check with your local water board to see what the aveerage 'grains' of hardness are for your area. Scale is nothing more than disolved lime precipitated out into the coil by reason of the heat.
Once scaled up you need to get the coil cleaned with an acid solution recirculated through the coil until it runs freely. This is best left to a local professional pressure washer dealer as the cost of aquiring and maintaining the acid in a safe manner will be prohibitive for most users. You can purchase descaler from any number of sources and the European macines often have a built in scale control system (chemical injector). You can also get the Scaltrol product that appears to work well. If you are not experiencing any of the symptoms above then using something like Scaltrol will most likely reverse the process or prevent it from even starting.
Hope this helps
? Cheers.
Once scaled up you need to get the coil cleaned with an acid solution recirculated through the coil until it runs freely. This is best left to a local professional pressure washer dealer as the cost of aquiring and maintaining the acid in a safe manner will be prohibitive for most users. You can purchase descaler from any number of sources and the European macines often have a built in scale control system (chemical injector). You can also get the Scaltrol product that appears to work well. If you are not experiencing any of the symptoms above then using something like Scaltrol will most likely reverse the process or prevent it from even starting.
Hope this helps
? Cheers.
Chuck Richard
New Member
nothing but water through coils, and burner always cuts off when trigger released. black really aggrivtes me at times but only does it occasionaly. i do downstream chems throuhg hose though.
doug mckenzie
New Member
chuck.............you know what? this has happened to me and i down stream .i have come to believe it's the different soaps i try. it's the soap cleaning /disolving the inner liner of the hose. for me, i don't think it's a problem. it has never become a problem. last's a few seconds/min.then it's over,but will come back again when i downstream. after a wile, i think it cleans the hose and dosen't do it any more. suds
Larry L.
PWN TEAM - Moderator Emeritus
I agree with Mark about the water over heating causing the black nasty stuff,when you are using hotwater and let off the trigger,the burner will turn off but the water inside the coil will get hotter as setting in hot tubes.If it does it while using coldwater then maybe you need to descale,you can take off the out going coupling at the burner to see how much scale build up you have,it'll be a whiteish,yellowish color inside the coupling or pipe.
Dave Olson
New Member
Shortly after we installed our new boiler we started having black water. We do not put anything thru our coil and of course it was brand new!
The manufacturer said that what we were experiencing was the interior of the coil rusting! “Once scale builds up the black will go away!†It continued to get worse.
We solved our black water problem by injecting detergent into the coil when we shut the unit down for the day. The detergent sat in the coil until the next time we would go out. Had to do this many, many times (did it hot too) and finally it coated the interior of the boiler coil and we no longer have black water!
Dave Olson
The manufacturer said that what we were experiencing was the interior of the coil rusting! “Once scale builds up the black will go away!†It continued to get worse.
We solved our black water problem by injecting detergent into the coil when we shut the unit down for the day. The detergent sat in the coil until the next time we would go out. Had to do this many, many times (did it hot too) and finally it coated the interior of the boiler coil and we no longer have black water!
Dave Olson
oguard
New Member
The black water is actually rust. The only reason it is not red is that there is limited Oxygen available to cause the reaction to complete. Eventually all coils will scale to some extent and reduce or even eliminate this. Sometimes the black water never disappears and putting a replacement coil (depending on manufacturer this would be warranty) will solve the problem.
Scale is not a bad thing and actually is desirable to an extent. Excess scale IS a problem though and the signs and symptoms are as I said above.
Causing hot soap to precipitate into the coil could be a real problem down the road. The soap will do essentially the same thing as the scale, the difference is that once a coil is plugged with soap it cannot be acid cleaned because elementary chemistry says that if you mix an acid and an alkali you get a neutral sum or in other words NO reaction. This is the reason why so many manufacturers are trying to get away from having high pressure soap and running the newer eco-friendly high solid soaps through the pumps and coils. Learn to down stream, deal with the black water on start up and let a little lime into your life and coil.
Hope this helps? Cheers.
Scale is not a bad thing and actually is desirable to an extent. Excess scale IS a problem though and the signs and symptoms are as I said above.
Causing hot soap to precipitate into the coil could be a real problem down the road. The soap will do essentially the same thing as the scale, the difference is that once a coil is plugged with soap it cannot be acid cleaned because elementary chemistry says that if you mix an acid and an alkali you get a neutral sum or in other words NO reaction. This is the reason why so many manufacturers are trying to get away from having high pressure soap and running the newer eco-friendly high solid soaps through the pumps and coils. Learn to down stream, deal with the black water on start up and let a little lime into your life and coil.
Hope this helps? Cheers.