thereon they do not work at high vac will ice up.spent week end looking for vac tanks. due to releasers icing up.i thing you should find a 300 gallon vac tank for your lower woods with a well pump and pump the sap to the sugar house. did you sell your syrup? haven is not buying right now. was in coscos in burling ton quarts of canadian 9.95. vt qts. 17.95. so the syrup is out already and the prices are dropping like a rock