Water hatch has both a gravity water spout and cap for filling the fresh water tank and a city water fill for connecting to a water faucet. It has a replaceable plastic check valve. Factory tested for ZERO leakage. Comes with a Key Lock with a "Global Pro" interchangeable automotive type cylinder that can be changed to match your entry door lock or other compartments. Made in the USA!Direct OEM ReplacementLock is "key alike ready" to match your entry door or other compartment locksGuaranteed not to Yellow, UV stable/colorfastReplaceable DoorPlastic Check Valve w/1/2" Male Pipe ThreadSpout accepts either 1-1/4" or 1-3/8" water fill hoseIncludes 3/8" Tank Vent ConnectionIncludes installation kitIAPMO, NSF & CSA Certified