How to Repair Leafield C7 & D7 Valves
NRS uses the Leafield D7 inflation/deflation valve in our drop-stitch inflatables, and the Leafield C7 valve in almost all other inflatable applications. They are simply the best valves on the market. They’re really durable, and easy to repair if necessary. All the working parts are in the outer portion of the valve, so replacing the plunger, spring and rubber seal is a snap. This video demonstrates the repair procedure with the Leafield C7; the same steps apply to repairing the D7.
The first step is to remove the outer portion of the valve. It’s easiest to do that with the boat inflated. Loosen the valve cap, place the Leafield C7, D7 & A6 Valve Wrench on the valve and turn counterclockwise. While removing the outer portion of the valve, keep track of the inner portion.
Now, with the inner valve portion in hand, push in the center pin and remove the rubber plunger seal. Remove the old center pin and spring and replace them with the new pin and spring from the repair kit. Pop on the new rubber plunger seal and the repair is complete. Test the mechanism to be sure it’s working properly; press in on the pin and turn it counterclockwise to the open position, then press in and turn clockwise to close it.
When reinstalling the valve outer portion, take care to put the black plastic gasket on the right way. On the C7 valve the ridged side goes against the boat material. The D7 gaskets has ridges on both sides, but you can tell from the shape that it only goes on one way.
Screw the outer portion into the inner valve portion. You can press on the inner portion through the boat material with one hand as you twist in the outer portion. Hand tighten, then inflate the boat. Now you can use the valve wrench to finish fully tightening. At this time, it’s a good idea to spray soapy water in and around the valve to ensure there are no leaks.