chris francis 15 Report post Posted April 15, 2009 has anyone tried adding a downstream injector to a dedicated pump and a water hose. Share this post Link to post Share on other sites
814jeffw 71 Report post Posted April 15, 2009 Started a thread on downstreaming the soap for roof mix over on RCIA. Will be working on ideas and real world results will be posted if I can ever get out of Winter here in Pa. Jeff Share this post Link to post Share on other sites
chris francis 15 Report post Posted April 15, 2009 Are you talking about pressure washer or dedicated pump like shurflo. I am talking about shurflo pump there has to be better way then mixing up the was ahead time put alot weare tear on your pump from bleach. Share this post Link to post Share on other sites
PressurePros 248 Report post Posted April 15, 2009 I'm not sure I am following you, Chris. I would think there would not be enough velocity of flow with a shurflo to create the venturi to draw chemical but I could be way off base. Dan T (plainpainter) is a physics and mechanics guy. PM him, he would know. Share this post Link to post Share on other sites
814jeffw 71 Report post Posted April 15, 2009 When you here people talking about roof cleaning, pressure washers are not the "pump" they are referring to. Dedicated pumps are the only way to clean a roof. So yes, I was talking about dedicated pump, just like your question stated. Jeff Share this post Link to post Share on other sites
814jeffw 71 Report post Posted April 15, 2009 I'm not sure I am following you, Chris. I would think there would not be enough velocity of flow with a shurflo to create the venturi to draw chemical but I could be way off base. Dan T (plainpainter) is a physics and mechanics guy. PM him, he would know. I think you're right about the Shurflo, but I want to rig a homemade check valve downstreamer into an air diaphragm pump. I think it may offer enough flow to draw. Just haven't really worked on it yet. I found a homemade one online that is used for some sort of water gun. Was made from 3/4 in. PVC and a rubber tire valve. Was interesting. Jeff Share this post Link to post Share on other sites
Apple Roof Cleaning 202 Report post Posted April 15, 2009 I was TOLD that lower GPM pressure washers have higher draw rates then high GPM ones do with an X Jet. Jeff LeCours told me this :) He actually told me he INTENTIONALLY bought a cheapo LOW Gpm machine JUST for an X Jet. Share this post Link to post Share on other sites
