I've just been given a roundup 2 gallon sprayer. It seems to me the top should be removable to add the liquids but I can't figure it out and don't want to experiment to the point that I damage something. Help!

Roundup Pro
And for tough-to-control, or dense, annuals mix a solution of 2 ounces (4 tablespoons) herbicide to 1 gallon of water. Woody vines and dense brush need 13ounces (26 tablespoons) diluted in 1 gallon of water to kill them; apply to leaves in late summer for best result

Release the pressure, push the handle down andturn it to the left.

Howdy g5483,Most reputable retailers' will either let you exchange the sprayer or get you the part. At The Home Depot we will gladly do either one to get you what you need.
Coach Dave

Howdy Mlavin55,It sounds like your trying to find the way for the handle to catch the threads. In this case you need to push down on the handle as you turn it counter clockwise. Within about a half turn the handle will sink just a little. Now you've got the threads and simply keep turning counterclockwise and you got it.Happy Gardening,Coach Davecommunity.homedepot

Check under the lid/cover for a rubber gasket. This may have gotten unseated when putting the sprayer top on. It must form a tight seal around the lip of the sprayer top in order to keep the pressure. Alternative: Put water in the sprayer leaving some air on top to build pressure. Put a few drops of dish soap inside and gently stir. Put the cover on, and tilt the sprayer to coat all areas at the top. Start pumping and see where the bubbles come out---there is your leak. If it is near where the sprayer hose enters, and it is a permanent mount, you may have a bad seal. If the sprayer hose unscrews, you may need a new rubber washer inside. If bubbles come out of the wand, or other plastic seams, you may have a crack in the plastic. Depending on the location, you could epoxy over the crack to seal it permanently. Good luck.

it should tell you on the induvidual bottles/cans of weed/grass what proportions of liquid/water to use.

Howdy chloebuckski,This is a question that I get quite often. Here is the answer; with some pressure push the handle inward while turning counterclockwise. When you feel the handle sink in, keep turning and you've got it.Hope this helps,
Coach Davecommunity.homedepot

To kill aphids,put 7-10 drops of liquid dish detergent in a spry bottle of water.Shake and spray.

Any Roundup Weed & Grass Killer RTU can be refilled with the new 1.25 gallon Roundup Weed & Grass RTU Refill bottle OR use Roundup Super Concentrate (purple cap).

Directions to Refill with Roundup Super Concentrate

• 24oz RTU: 1 oz of RoundUp Super Concentrate, fill with water very slowly to avoid foaming.
• 1/2 Gallon RTU: 2 1/2 fl. oz. of Roundup Super Concentrate and slowly add 1/2 gallon of water
• 1 or 1.1 Gallon RTU: 5 oz RoundUp Super Concentrate, fill slowly with 1 gallon of water
• 1.33 Gallon (PNS & PNG): Add 6.5 fl oz of the Super Concentrate to container and slowly fill with water

Hi,
There is a built in relief valve that is not keeping the pressure in...
these are very cheap plastic valves and so there probably is no fixing it...
I would buy another roundup with the sprayer and then dump the contents from the bad one into the new one ... the stuff does not go bad...

heatman101