I have an old two gallon sprayer made by the same manufacturer. It is about ten years old, and has worked beautifully until this month. To be fair, I have never released the pressure after spraying nor emptied the glyphosate mix, nor cleaned the sprayer by spraying water through it after use. I gave my old unit a complete cleaning and overhaul, except I have not replaced any washers or gaskets. It is leaking air pressure through the pump handle, so I think I need to replace the washer at the bottom of the pump. I bought this new one hoping that the pump mechanism would also fit into my old sprayer, but no such luck. This one is rather flimsy in manufacture, which is the only reason I give it less than five stars. However, it went together very well. It helps to lubricate every part that goes together, plus the gasket on the pump mechanism, with a very light coat of petroleum jelly. This thing really sprays well! At $ 5.00, it is an unbelievably good value. The pump mechanism handle is rather flimsy, so be sure to keep that top gasket lubricated with a little petroleum jelly, and don't tighten it more than necessary to prevent air leaks.
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