Keep your Solo sprayer operating like new. Genuine Solo replacement parts. Fits all Solo manual sprayers EXCEPT 400-1G, 405-B, 405-N, 405-US, 406-US, 453 and one-hand sprayers. This kit replaces all wear parts in Solo’s part number 4800170 shut-off valve. 4800170 is used on all Solo backpack and most Solo handheld sprayers.