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

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Here is my favorite post from Tim Aselton Softwashing from Tallahasee, FL.

I ran some tests last weekend on my pump with three different diameter hoses to see just what I could get at the end of 200'.

The tests were done to maximize my efficiency and not for starting up more "hose wars".

The pump pulled water from a supply tank and was attached to each line via a 3/4" x 4' supply hose coming directly out of the pump.

The pump open flowed 14 gpms and had a "static" pressure of 150psi.

Some hoses have different liners that flow with less resistance, but these hoses were all that I had.

The picture below shows what each hose "open flowed" (no nozzle) at 200'. I did test the flow/psi with different nozzles and the higher flowing lines produced more psi every time.

As you constrict the flow you generate the psi, more flow=more psi as long as you have good pressure output at the pump.

I made up a nice chart, but it got all messed up when I previewed it. Pumps are different, but the flow
capabilities of hoses are what they are. The longer you go the larger you need to get max out of it, the same is true with electricity.

I am in the fire service and this is all common to me since I drive and pump fire trucks (10yrs) when I'm not washing roofs and houses. When we need to go a good distance we lay the 5" lines.

Pressure Washing Pro
Greensboro, North Carolina
(336) 362-7659
www.pressurewashingpro.com
www.roofcleaningpro.com

-- Edited by Apple Roof Cleaning at 16:43, 2008-09-24

 

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I really appreciate this post too.

Because of the time and LEVEL detail Tim Asleton put into posting pics, testing and then posting the test results, therefore, helping other contract cleaners make sense of a difficult subject.

Even though you Tim, and I ,  as Operations Manager of Roof Clean USA are both in the same neck of the woods, and WE BOTH compete CONSTRUCTIVELY in the SAME market,  I RESPECT you, your business and marketing acumen and savvy and appreciate the dedication you have shown to the Contract Cleaning INDUSTRY and its contractors.

Hats off to you Tim Asleton, of Tim Asleton Softwashing.

 

-- Edited by Roof Clean USA Georgia 229-227-0000 on Friday 3rd of April 2009 07:14:42 AM

Hey everyone, every Easter Vinny has a big BASh at his house. All the food and booze you can handle. I will be there by 5pm call him or I for directions......see you there!

Roof Cleaning Long Island New York (631) 220 6985 wrote:

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I found a hose friction loss chart in the back of one of my catalogs ( Dultmeier Sales) and wow what a differance between 1/2" and 5/8" if your water flow is 5gal/min. (example: using a 5800 series delavan ) and your hose is 100' long your loss with 1/2" is 34psi and with 5/8" its 10psi  , 3/4 is 4psi., they have other charts showing water flow loss also . So al the newbies thats including me get 5/8" or larger.  Happy Easter, Vinny

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http://www.dultmeier.com/pdfs/tech-library/02Water8.pdf

I found the friction loss chart Vinny.  Excellent information.

Using the 12V Delavan 7870 FATBOY 7gpm pump the difference is almost as dramatic going from 5/8" hose (20psi loss) to 3/4" hose (7psi loss) per 100 feet.

I am dumbfounded some pros are using 1/2" hose on the FATBOY 7gpm pump, which kills it's flow and pressure with a 50psi loss per 100 feet. 

This will quickly fry your pump, relay switch or fuses very fast from excess amperage draw.  The poor pump has to work it's a$$ off to try to compensate for such a small inside diameter hose.

This is like going to the car dealership and asking to buy a Ferrari at full price, have the engine taken out, and replaced with a hamster & treadmill because you don't want to go that fast.

Makes about as much sense as a football bat!  LOL!

 

Roof Cleaning Pro Greensboro NC (336)362 7659 wrote:

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

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Roof Cleaning Long Island New York (631) 220 6985 wrote:

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I found a hose friction loss chart in the back of one of my catalogs ( Dultmeier Sales) and wow what a differance between 1/2" and 5/8" if your water flow is 5gal/min. (example: using a 5800 series delavan ) and your hose is 100' long your loss with 1/2" is 34psi and with 5/8" its 10psi  , 3/4 is 4psi., they have other charts showing water flow loss also . So al the newbies thats including me get 5/8" or larger.  Happy Easter, Vinny

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LOL it gets WORSE are the flow increases too !
A Delavan with 5/8 or better YET the 3/4 inch hose sprays really well.
Can you BELIEVE some people doubt this ?

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I know Chris, it's beyond me why they don't listen or don't understand.

Like Ron White says, "You can't fix stupid !!" LOL!

Some people will continue to choke their pumps to death with pathetic hoses, guns, and nozzles.  Never ceases to amaze me.

 

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Here is what I THINK Mike ?
Some people don't WANT folks to be FAST and save their Pumps.
So - they ridicule people like us who have experimented and KNOW the truth!
Belive ME Mike - many of them KNOW what we know about hose size - but want to DENY that knowledge to others !!


That is ONE reason I STARTED this  Roof Cleaning Forum.

To be able to TEACH the truth with my friends TO those who want to learn - FREE from the "Dark Side"

 

Satcahr wrote:

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I for one appreciate what you all are doing. If it weren't for you guys I would have gotten the bandit with the under-sized hose and added cost. Now I am building my unit just waiting to hear back from PWP on prices, shipping etc...

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Yep, gotta watch the Internet my friend.
LOTS of shills out there who will lead you to whatever their favorite suppplier SELLS, not to what is truly BEST for you.

Big Hose is kind of a hassle, you need a bigger hose reel, and most suppliers dont carry the bigger hose reels required, or are too freaking Lazy to look in a Titan Hose Reel Catalog.

Often, the supplier has to buy the big  diameter hose in bulk reels of 500 feet, or more!

You want 200 feet, and they dont want to "get stuck" with leftover big hose.

So, they compromise you, by selling what they HAVE, and getting all their Internet Shills to flat out attack anyone who DARES to disagree with them.

Some of these Supplier Mother Funkers have their own Internet "boards"  or so called Forums that read like one big Funking Informercial.

In fact, some of the "people" on these board are reputed to be the owner or employees of the supply house, posting from different computers .... ...

They ACT like fellow cleaners, and make suggestions to you on what you "should get"
But beware these deevious Mother Funkers my friend!

There are real live roof cleaners here at RCIA, men like me, who clean roofs for a living, and are passionate about advancing the roof cleaning art.

We wont allow you to make a mistake, because we have all made them in the past, and learned from our  own experiences.

Remember, the ONLY "stupid roof cleaning question" is the one you do not ask ?

Mike Sullivan and others here at RCIA have the Delavan Roof Cleaning Pumps down to a science.

They know what works, and what does not.

And Lori at PWP has all the right roof cleaning stuff at great prices, with fast service too.

You are in good hands my friend, and I wish you all the success in roof cleaning I have enjoyed for many years.

Chris

 

JONN_ That would, as the shorter distance you are pumping, the better flow/psi you have.   I amde the same mistake, thinking 1/2 inch hoses would be easiet to drag. I've shortened my 350' hose down to 200 and add too it with section wen I need to extented it.