Harvey Products 73 Wright Lane North Kingstown RI 02852 401 295 8382
Valves are made by Halkey Roberts, a major supplier to the inflatable boat industry. These valves are the same ones found on many of the major brands of inflatable boats and are made of the finest materials available.
The valve is held in place by the outside cover such that it remains in the correct position even when deflated.
To inflate, the (yellow) central stem must be in the UP (closed) position.
The pump adapter is the largest on on the ring and is a very tight fit for the valve and you might need to hold it in place as you pump. It can take several minutes to pump up until the tubes are very firm. Replace the cover and twist closed to prevent accidental deflation.
To deflate, remove the cover, push the stem in and twist 1/4 turn clockwise to keep it in the DOWN (open) position to allow for complete deflation.