Sap Puller Pump 200 E Electric. Can be used with car batteries or with small generator if no electrical access. For smaller producers. Does not need to be in a heated space. Good for up to 800 taps or more if the terrain is steep. No releaser needed. You need a very tight system for these to be effective as just a few leaks will effect it. Disconnect from mainline overnight when it will freeze and allow ice in lines to exit before re-connecting. Ice will slice the diaphragms. New valves are in that are not the duck bill type and are easier to change. The diaphragm has also been upgraded and should last longer. Both are Food Grade.