[mark_roberts]

Is there any noticable difference in the pressure power of these pumps when cleaning.  A supplier told me theres no difference between the 135 and 200 psi pumps.

thanks
Mark

[Len Gribble]

Mark

Haven’t got the foggiest, how ever thinking about upgrading pump on my Ninja any recommendations welcomed, also best place to buy.

Len

[nick.solution]

Hi Mark

I suggest you talk to a different supplier, the only way you wouldn't see a difference is if the nozzles on the higher pressure machine were bigger ie less back pressure, I think the pressure you are comfortable working at is down to the individual. personally I prefer between 250 and 350 psi, the cfr mchine can be used at between 50psi and 1000psi, however the other factor is the pump flow rate the cfr pump is low flow but high pressure, therefore fluid usage is relatively good, and combined with the wand you don't over wet.

I hope this helps

Best regards Nick

[Dynafoam]

Mark,

Have you ever washed a garden path with a hosepipe?

An 'open' hose will put down water but with a thumb partly covering the end to create a higher pressure jet, more dirt is dislodged.

When cleaning carpets, the amount of water put down has to be recovered but used properly and correctly jetted a higher pressure system can leave carpets cleaner AND dryer.

John.

[Ed Valentine]

Mark;

I would also suggest reling on another  supplier for answering your question whom demonstrates alittle more knowledge on this subject.

Basically stated, ---**and everything being equal**---( as Nick and John have explained) there is a terrific difference between 135 and 200 psi. And, I too prefer cleaning between 250-350 psi because of its "Surface Impact". However, the most important aspect is "flow" along with the pressure rating. Flow is related directly to the "Flushing" action.

For example, a pump showing a pressure of 1,000 psi using a .01 jet (to achieve this psi) w/ a pump flow rate of only .008 is barely a mist (There are pumps like this).

However, a 350 psi pump w/ a pump flow rate of 2 GPM with a .o6 jet will flush the carpet faster and the results will be much cleaner. Another example regarding psi are the spec's that most spotting machines have. Most , here in the States use an oscilating style pump. Yes, they may be rated at 60 psi and are no larger than half the size of ones' fist. But, the  flow rate is extremely low. However, compare a Shur-Flo Pump at 60 psi and it is like nite and day!!! No comparison.

BTW, John Bolton mentioned that one has to consider the "extraction performance" whenever considering increasing their PSI/Flow. Very important.

Good Fortune to our British friends;
Ed Valentine
cross-american corp.