What the most effective product

[Freebee]

Can someone please explain how a passive nozzle, spinning by the water flow from an average engine that produces ~100 bar (1450 psi) without any added energy can more than double the pressure?

I would not say I am an expert... but on my karcher the spinning nozzle has more power, it will cut grooves in wood and scour paving slabs etching the surface of concrete slabs.

a quick google says " Rotating nozzles use centrifugal force to produce a strong impact and a spray pattern. ... The nozzle rotates a powerful, zero degree spray pattern in a circular motion to break down tough dirt and grime. By spinning the discharge water, the spray adds additional scrubbing ability to the cleaning process" .

 

[bobtooke]

Can someone please explain how a passive nozzle, spinning by the water flow from an average engine that produces ~100 bar (1450 psi) without any added energy can more than double the pressure?

Bernoulli's principle

 

[Restoration man]

I use oxalic acid , buy it on eBay cheap as chips in granules mix with water have look on YouTube for amount to use and put in pump up sprayer , works great , recently did boat that hadn’t been cleaned in 10 years left under conifer trees, I pressure washed it even tried jif but nothing would get staining out of the none slip and the sides wasted so much time scrubbing then I remember that I still have some oxalic granules , I mixed up some oxalic acid and it melted the marks off before my eyes not even any need to scrub and quick hoze off , oxalic acaid is the main ingredient in lots of the expensive starbrite products

 

[ChromeDome]

Bernoulli's principle

Indeed, similar to air flow in a venturi: "Thus an increase in the speed of the fluid – implying an increase in its kinetic energy (dynamic pressure) " - still at a constant static pressure (from the pressure washer pump).

 

[paul salliss]

Would Cilit Bang or Brintons patio cleaner damage synthetic teak as I am worried that my relatively new aft deck could get stained by these products perhaps

 

[ashtead]

We use patio magic on Flexiteak (mindful other makes might be different though) and have done so for some years without obvious adverse effects. If you are worried maybe a call to the aft deck “teak” supplier or try on a sample ? You can lightly sand Flexiteak if black marks or scratches at say a boarding gate point

 

[longjohnsilver]

I use oxalic acid , buy it on eBay cheap as chips in granules mix with water have look on YouTube for amount to use and put in pump up sprayer , works great , recently did boat that hadn’t been cleaned in 10 years left under conifer trees, I pressure washed it even tried jif but nothing would get staining out of the none slip and the sides wasted so much time scrubbing then I remember that I still have some oxalic granules , I mixed up some oxalic acid and it melted the marks off before my eyes not even any need to scrub and quick hoze off , oxalic acaid is the main ingredient in lots of the expensive starbrite products

Oxalic acid is great for stains but pretty useless for general dirt.

 

[fred247]

we've been using "wet and forget" for years, (like patio cleaner) spray on leave! works by the atmosphere lasts all winter no algae or dirt.

 

[sailorman]

Traffic film remover is your friend.

Try cpc farnll for tfr

 

[longjohnsilver]

Try cpc farnll for tfr

I bought this and have been very pleased with the results