Confident Roof Cleaning Houston TX wrote:

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I actually know someone very popular in the roof & exterior cleaning world who uses a very similar pump and probably does more roofs than anyone here. (Except Dan :) ) Use what you like and let us know how well it works.

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 That actually made me laugh Scott ...
let us know how it holds up

swee****erfish wrote:

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to find out more about them look up "water pressure booster pumps", Teel, Myers, and Ghoulds are popular makers. Do not leave chemical in them, they must be rinsed out after each use. But this is not problem on our set-up, at we just hit the valve and use the same pump to rinse with when we're done with he roof.

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These have been around for years, and work better if you bypass them back to your tank.

This way the pump is not building pressure when the gun/ball valve is off. Of course, if you let the pump build a little pressure, that first shot will be nice I stayed away from them for 2 reasons. One - I don't want to be plugging into my customers electric, 2 - because I have known a few people who had problems with them, like they did not last very long doing tile roofs. Maybe for softwashing or shingle roofs they may be ok. But 1/2 of the roofs we do are tile, and I have my concerns about the effect on the  components.  Some Centrifugal pumps do not like to be run dry, so they must have flooded suction. This means a bulkhead, and the inevitable leaks. I was gonna buy one and hook it to a little gas powered generator, just for kicks one time long ago.

But the Yamada Air Diapraghm Pumps have worked very well for us. I wonder how big a generator it will take ?

swee****erfish wrote:

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Here's a quick run down on the water pressure booster pumps. For residential washing, the most popular size is 3/4 HP. The Myers I've been using for 6 months now will push about 8-10 GPM through 300 feet of hose, and I get 30-35 feet of distance on a windless day. As far as nozzles go, I use a $3.99 plain trigger style gun. You get a pretty heavy stream coming out, which makes it great for softwashing.

My buddy typically washes 3 jobs per day and he has a Ghoulds which which a little more expensive than a Myers. That pump has been going to 2.5 years, but I have never seen that type of life from a Myers. These type pumps are typically warranted for a year, so if something does go wrong, the replacement is instant at the dealer. I've never seen a head failure, its always been motor issues. The Ghoulds have interior fans which keep the motor cooler. Heat can kill these things.

I've never bypassed my pump, but that would be a good idea. They are not demand pumps and will keep pumping and backing up pressure. Too much back up is bad for the motor.

As far what size generator, i know a 2000 watt won't push them. I carry a 6000 watt on my rig and that works fine when needed. The amp draw is about 14-15, with a heavier pull at start-up. I prefer to plug into the customers electric. Its nice to be able to work and communicate with he crew and not have to yell over a gas engine. I''ve never had a problem with these pumps tripping breakers at customers houses.

They are not self priming, so you'll either need a pressurized tank, or flow the water though the pump to prime. One primed however, they'll hold that prime until the end of the day, even driving from house to house. These pumps can be wired for 220 if desired.

They always need rinsing, but since my set-up is plumbed to use this as a rinse pump too, thats not a problem.

If anyone has more questions about this style pump, feel free to ask Its the only kind of pump I've used in this business, and have always been happy with the results.

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