Why is this a problem to you? Is it filling too little or too much? First, you must make sure the refill tube is not more than 3/4" into the over -flow tube. If you have a float arm ,you must bend slightly the arm to change the level. Or if you have a fill valve float bobbin, you need to slide the adjustment up or down the appropriate amount. The water level should be at least 5/8" to 1" below the top of overflow tube. Goodluck, macgivor
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Why is this a problem to you? Is it filling too little or too much? First, you must make sure the refill tube is not more than 3/4" into the over -flow tube. If you have a float arm ,you must bend slightly the arm to change the level. Or if you have a fill valve float bobbin, you need to slide the adjustment up or down the appropriate amount. The water level should be at least 5/8" to 1" below the top of overflow tube. Goodluck, macgivor