It's always a good idea to rinse out your sprayer with water after using WB to help prolong the its life. But to answer your question, there is the spraymaster spray bottle which is a heavy duty chemical resistant sprayer that has a 5 year guarantee against failure. They are about $5 a pop and you can get them at AG or locally at homedepot in the gardening section.
Pressurized is the way to go. I use half gallon Spraymasters and have never had one issue. Viton seals are necessary for the triggers, but once you use a pump up, you will never go back.
I must be terribly lucky then. I have had it in a spray master for about 6 months. I never rinse it and never release the pressure. It works perfectly every time I use it. I also have the Meg's 32oz bottle from AGO with the Foaming sprayer head they sell. It only gets used a couple of times a month, but never gets rinsed and it still works fine as well. I wonder what the deal is for you guys.
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