The simple answer is, unfortunately, no. The hose-end sprayer that comes on a quart of Hydretain or The Hydretain and FOURPlay bottles have a different thread than the other quarts bottles, such as those produced by Greene County/N-Ext and our packages of empty hose-end bottles. Because of this thread difference, the sprayer tops will not fit and are not interchangeable.
You can, however, reuse the Hydretain or FOURPlay with the Greene County products. If you measure out the exact amount of product you need for the space you are covering, for example, 6 oz of RGS to cover 2,000 sq. ft, you can put that product in a rinsed-out empty Hydretain/FOURPlay quart bottle and fill the rest with water. We always recommend spraying liquid products in no more than 2,000 sq ft sections.
Keywords: Hydretain, Hydretain quarts, hose-end sprayer, fit, quart hose end sprayer, hose end, FOURPlay, four play