Lawn & pasture, all-purpose chemical sprayer advice?

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Those are nice sprayers. What size tank? What chemicals do you use?
100 gallon
I use everything from roundup to 2-4-D. When one of those sprayers is bought, it has a roller pump that is operated by the PTO shaft. Roundup is very corrosive to some metals, that pump being susceptible to damage from it. The guy at the COOP where I buy chemicals said to flush the tank with Ammonia after spraying to negate the corrosive effects. It worked for years, and finally thought I should update to the silver model of that pump that is immune to roundup corrosion. I did, and after installing it, opened up the old pump. The COOP guy was right. There was no corrosion on the internals of the old pump. Ammonia can be bought at Dollar General for a couple bucks a gallon.
So I have a spare now.
 

rawhide

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100 gallon
I use everything from roundup to 2-4-D. When one of those sprayers is bought, it has a roller pump that is operated by the PTO shaft. Roundup is very corrosive to some metals, that pump being susceptible to damage from it. The guy at the COOP where I buy chemicals said to flush the tank with Ammonia after spraying to negate the corrosive effects. It worked for years, and finally thought I should update to the silver model of that pump that is immune to roundup corrosion. I did, and after installing it, opened up the old pump. The COOP guy was right. There was no corrosion on the internals of the old pump. Ammonia can be bought at Dollar General for a couple bucks a gallon.
So I have a spare now.
Yes, I've read that the "blue" pump is not recommended for glyphosate or fertilizer. However a lot of online posts that say the same as you. Thorough cleaning after use and it will last many years. I may use the old small sprayer for glyphosate though. I don't see using it in large areas.
 

Snattlerake

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rawhide

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100 gallon
I use everything from roundup to 2-4-D. When one of those sprayers is bought, it has a roller pump that is operated by the PTO shaft. Roundup is very corrosive to some metals, that pump being susceptible to damage from it. The guy at the COOP where I buy chemicals said to flush the tank with Ammonia after spraying to negate the corrosive effects. It worked for years, and finally thought I should update to the silver model of that pump that is immune to roundup corrosion. I did, and after installing it, opened up the old pump. The COOP guy was right. There was no corrosion on the internals of the old pump. Ammonia can be bought at Dollar General for a couple bucks a gallon.
So I have a spare now.
How much ammonia do you use per gallon?
 
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How much ammonia do you use per gallon?
I did a triple rinse of the tank by spraying fresh water into it, and all around the sides until it started running out of water, then put in a gallon of ammonia along with about 10 gallons of water and let it recirculate for a bit, then let it spray out and did another rinse.
I may have went overboard on the rinses, but the pump sure didn't show any damage.
As stated above, wear PPE, removing everything and getting into the shower as soon as finished. Get the clothes into the wash as well by themselves.
 

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