Re: PTO Water Sprayer Info Needed

Posted by Mattlt on March 11, 2005 at 12:28:42 from (64.89.108.230):

In Reply to: Re: PTO Water Sprayer Info Needed posted by Scott Swanson on March 11, 2005 at 11:18:36:

I don't think you'll be able to mount a very big tank directly on the hitch, as it will be in the way of the PTO. I think a small two-wheeled trailer would be the ticket. You should be able to mount the pump itself somewhere on the hitch. Then, pump into the tank on the trailer. Remember that water weighs over 8# per gallon, so the weight will add up quickly.

Since you want to use the pump to both fill and empty the tank, you will need to do some fancy plumbing. Some sort of three-way valve on the suction side of the pump would be needed. When filling the tank, have the valve turned so you'd be drawing from the hose that goes to the pond, and the discharge hose from the pump going back into the top of the tank. When spraying water, turn that three way valve so it's drawing from the tank. Note: make sure you don't have any air leaks on the suction side of the pump. This will cause major headaches.

You shouldn't need an auto shutoff switch. Perhaps a pressure relief bypass valve. When the pressure becomes too great, this valve will open, causing water to go back into the tank (assuming you have a line running back into the tank?)

A really cheap way to do this is to run a 1/4" line from the output side of the pump, back to the input side, using T fittings. That way, if the output flow is stopped, there will still always be some water flowing through the pump. Note, this line will also need a shut off valve of some kind, or you may run into priming problems.

Clear as mud??? Maybe you could take a close look at someone's spray rig, or the local fire department's grass rig? Also, try an internet search on "fire skid unit", this should provide some info on how the plumbing would need to be done.

--Matt.

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