Product review (4 stars): Do NOT buy this yet as it WON'T fix the ...
Do NOT buy this yet as it WON'T fix the dipping!!!! If it dipped less than a cup (2 oz) in 24 hours, it is NOT the valve issue!!! 8201815 Connector will fixed the dipping issue and will save a lot of  your time and frustration and wonder why replaced the valve and it is still dipping! 8201815  is a ball check valve will stop the flow right away, so any of water from water reservoir expansion couldn't get through the check valve any more so no more dipping.