4900405-K Sprayer Pump Repair Kit for Models 454, 456, 457 and 457-Rollabout

This kit made the Solo whole again...5 stars.

Faster and easier than paying someone to rebuild yours or tossing it into a landfill and buying a new one. I've gotten more that 20-years from my sprayer because of these repair kits. Make your sprayer like new again for a few dollars!

This kit seemed to fit my old solo 457 OK but while it improved the air leak I was getting from around the shaft of the pump, it didn't completely resolve it. I may just buy a new pump, but this seems to have gotten the old one to at least what may be a usable pump for the time being.Solo isn't available by phone. I left a message but have no idea if they will actually return the call.I called them for two reasons. One is, in their sprayer disassembly and repair document, on line 7 they refer to replacing the o ring on "the plug (C)". I dont know what that refers to, the image, even on the web site is too small and becomes too blurry when you zoom in to make out exactly what it is. In addition, there is no part in the parts list called "plug".The second reason is the big main o ring/gasket has a flat spot on one side. Nowhere in the repair document does it refer to this flat spot and which way it should be oriented. The repair kit comes with zero instructions on the packaging.At first I put that gasket with the flat spot facing down against the top rim of the tank. I was still detecting an air leak. I flipped it, flat spot up, and that improved the leak.

Great price

Didn't fit the sprayer listed in listing

No instructions, could not use.

Worked perfectly for my Solo 456. Went from being unable to pressurize the tank to great pressure with minimal pumping. I went ahead and replaced all of the seals in the pump while I had it apart and they all fit perfectly. I'll save the wand seals for when they are needed. This appears to be a Solo branded product in original packaging, so buy with confidence.

Saved my heavy duty sprayer! Simple to install.