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When you are cleaning the edge of a tile roof, if there was a minor loss of flow it would not matter.  The limiting point on flow would be the nozzle.  If anything it would loss of pressure, but not much enough to matter.

Andy    No not at all it is the same pressure and flow , its 1/2 in PVC  , its nice I dont have to go to the edge of the roof, I can get it from 4-5 tiles up and the ground man, keeps a close eye to see if everything is hit   Thanks  Steve   (Dabber)

Tom     You are right old guys make great groundsmen, now all I have to do is find a young spray man , then this old guy will be the ground man, you would think it would be easy with all the unemployment, but its not   

Thanks for the comment     Steve    (Dabber)

TomD wrote:

Old guys make good ground men.

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 I disagree.  I enjoy cleaning roofs and it is a lot easier than being the ground man.  It all depends on what shape you are in.

andy hinson wrote:

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Do the sharp turns affect flow?

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 Not all that much, same as a small diameter hose reel mainfold don't "hurt" as much as some thing it does.

This is because in 200 foot of hose, the small part the manifold of a hose reel represents is not all that great.

Same with a bend that is sharp, as long as it does not choke off flow like a kinked hose, you are cool.

But, 200 feet of hose coiled on a reel, is a different story 

dabber wrote:

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Marcus      you are right I dont mind spraying roofs to much except for the barroll tile roofs we have alot of here in se fl ,  its hard for me to walk on these roofs , and also with the air diaphram pump  I find myself not being able to move fast enough , and be safe at the same time , love spraying shingle roofs and flat tile roofs though Thanks   Steve (Dabber)

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 With an air pump, you can put even a super small mist type nozzle on it, when cleaning tile roofs. Do not be scared to go down in nozzle size, to reduce run off.

dabber wrote:

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Hey to everyone on the fourm ,  I made this wand so I can spray back up at the lips of  tile roofs, without going to the edge, I know its no big deal , but it sure helps me feel better,  us old guys should not go to the edge,  Thanks   Steve   (Dabber)

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 I made similar pvc wands to do the edges, years ago. Now, We just do the edge from the ground-one guy cleans, one comes behind with a garden hose. Or if a lone-i hose in each hand. When I used the "thingamajigs" I would misss here and there.