The WPM20 is an extremely rugged 2 door opening, energy free unit for cattle.  It has simple installation, attractive design & has animal friendly flaps – no ball or float closures to ice.  Nature’s ground water temperature does this job.  Polar Max Drinkers operate like thermos all year long.  Stainless steel bolts & removable top afford easy access to plumbing.  Optional wing bolts are available for Grade A inspections.  Unique baffles guard against icing & keep valve operating under severest conditions.  Notched flanges for easy anchoring.  Weather strip & an insulated sleeve for the supply line come with each unit.  no heat well needed; use an 8-12″ tile; can be fitted on most existing pads.  Sealed bottom keeps out moisture & rodents.  2-2″ drain holes for fast clean out.  Foam insulation between walls has an R-value of 7.14″.  Double wall DURAROCK construction contains hindered amine light stabilizer, the most effective ultraviolet inhibitor.  Seamless sidewall cannot leak.  Tolerance to water level – you don’t have to worry about summer & winter water levels.  Dependable, non siphoning valve – proven & trouble free.  Livestock can drink out of both flaps at the same time, not always so with a ball closure.  No pulleys & cable to foul & rust.  Serves 150 beef, 60 dairy, 100 cow/calf.