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 Replacement Lock is "key alike ready" to match your entry door or other compartment locks. Guaranteed not to Yellow, UV stable/colorfast Replaceable Door. Plastic Check Valve w/1/2" Male Pipe Thread Spout accepts either 1-1/4" or 1-3/8" water fill hose. Includes 3/8" Tank Vent Connection. Includes installation kit. IAPMO, NSF, CSA & TEI Certified.