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Ron Musgraves wrote:

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Apple Roof Cleaning Tampa FL (813) 655-8777 wrote:

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seauatthetop wrote:

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any 411 on the flow jet from pressure tek as compared to all flow , yamada thanx for the response

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Well, I sure don't want to be accused of bad mouthing anything Bob sells, so this places me in an uncomfortable position. But from a purely theoretical point of view, here is how I see it. The FloJet air diapraghm pump is very attractively priced! Basically, it is 2 pumps placed together, to acheive the desired flow. This mean 4 diapraghms are doing the work of 2 vs the Yamada and All Flow. Just as a bigger woofer makes more bass, a larger diapraghm makes more flow, all things being EQUAL. It is real simple Bore times Stroke equals Displacement. Air and Liquids are BOTH Fluids, so the same rules apply. Now, when we have a small bore(diapraghm), to make it displace as much as a larger one, we need to increase it's Stroke!

This means the diapraghm must travel more then a larger one, to displace the same amount of Fluid. So, in an absolute sense, a Larger air diapraghm pump is "better", since the larger diapraghm moves less.

This is the THEORY guys, but do not underestimate FloJet ! They are a huge company, and their pumps were computer modeled for long life. And remember, a small block Chevvy has a shorter stroke then a Big Block, yet lasts a longer time!

In the final analysis, I think it all depends on WHO you feel comfortable buying from. Bob has been known to have a few mistakes that were not his fault in the past, but has Always taken care of his customers. That has got to mean something. For years, in Seattle, I always bought Subaru's, just because of the great service from my local Subaru Dealer! I don't think you can go "wrong" with any of the 3 pumps, and what is better is a matter of opinion. I drive a new Ford F 150, so it is "the best"

My friend drives a new Silverado, so it is "the best".  I could be happy with any of the 3 pumps mentioned, as far as Poly Pumps goes. Now Kevlar, that is better, but bring your checkbook. The 1/2 inch Kevlar yamadas I use are 700 dollar pumps

 

 

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How many roofs did your pump last through

 

 

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WE are getting from 6 to 8 months of use average out of our unrinsed Pumps before it is rebuild time. But we really use our pumps a lot. Usually the diapraghms go out, and this is normal wear and tear for any diapraghm pump. Every now and then an air valve will get a little cranky, but a shot of WD 40 in the air line, and it is good to go.