How To Guides
- How to undertake a professional quality repair of your PVC or Hypalon RIB, inflatable boat and SIB tubes
- How to clean inflatable boats, protect RIB collars, tubes and sponsons, clean Hypalon and PVC inflatable boat fabric
- How to find a leak in my inflatable boat, RIB, dinghy, life raft or inflatable kayak collar or tubes
- How to fit a replacement screw-in type inflatable boat, rigid inflatable boat (RIB) or dinghy inflation deflation valve
- How to fix or glue inflatable boat PVC fabric patches and accessories to Hypalon fabric RIB collars and tubes (and vice versa)
- How to identify the fabric of your RIB, inflatable boat, dinghy, life raft or inflatable kayak collar, tube or sponson. Hypalon or PVC?
- How to repair inflatable boat, RIB, RHIB, SIB and kayak collars, inflation tubes or sponsons
- How to replace a Leafield Marine A4 inflation/deflation valve older inflatable boats, RIBs, RHIBs and dinghies
- How to replace an inflatable boat valve
- How to service and/or fit a replacement diaphragm to the Alfons Haar type SF1 inflation valve
- How to service or repair the Leafield Marine A7 or B7 inflatable boat valve
- How to service or repair the Leafield Marine C7 inflatable boat valve
- How to clean your RIB with August Race products
- How to winterise and store inboard engines and outboard engines
- How to make an emergency repair using TEAR-AID® Type A to a Hypalon inflatable boat, RIB, raft and other Hypalon / rubber inflatable structures
- How to make an emergency repair using TEAR-AID® Type B to a PVC inflatable boat, RIB, raft and other PVC / vinyl structures
- How to check your lifejacket
- How to install a TRIB airCap HR
- How to install a TRIB airCap LF for Leafield Marine C7 & D7 valves
- How to store your inflatable boat over winter
- How to look after and maintain the ropes on your boat
RIBs & Inflatable Boats
Safety Data Sheets
How to service or repair the Leafield Marine A7 or B7 inflatable boat valve
After a few years of faithful service, the rubber diaphragm on a RIB/Inflatable Boat Leafield Marine A7 or B7 inflation valve can fail as either the rubber material becomes brittle and fails to ‘seat’ properly within the inflation valve, or the spring or plastic diaphragm spindle can fail. Replacing the Leafield Marine A7 or B7 inflation valve diaphragm is a straightforward job and the service kits are available from ribstore.
To service your Leafield Marine A7 or B7 valve, you will need:
- The ribstore A7/B7 service kit, which contains a new valve spindle, spring and rubber diaphragm (1 kit per valve) see: https://www.ribstore.co.uk/products/leafield-a7-b7-rib-inflation-valve-service-kit
- For A7 - a socket or large pair of grips + cloth to cover wrench jaws and clean components
- For B7 - a valve wrench spanner see: https://www.ribstore.co.uk/products/a6-b7-relief-valve-spanner
- Pair of long nosed pliers
- A small length of masking tape
Refer to diagram below of the valve assembly to familiarise yourself with the inflation valve and its components, before you start the job.
- Lock the valve spindle in the open position by pushing-in and twisting anti- clockwise the valve spindle to deflate the inflatable boat collar or tube.
- Keep the tube as flat as possible to avoid losing the valve part inside the tube from getting lost. It can be very difficult to retrieve if it falls inside the tube.
- Maintain a grip on the inner valve assembly through the inflatable collar or tube fabric to ensure that the inner assembly does not fall loose inside the tube. Unscrewing anti-clockwise remove the nut/outer valve assembly from the inner assembly (plus washer on the A7). For A7 - use a socket/spanner or a large pair of grips (use a cloth to cover the jaws of the grips to prevent damage to the plastic valve). For B7 - use a B7 spanner wrench. Tie some strong cotton thread or string around the screw thread of the inner valve assembly and secure the other end of the string whilst you dismantle the valve. Put a piece of masking tape over the depressed spindle to stop it falling into the tube later. Whilst continuing to grip the inner valve assembly through the inflatable tube fabric, push the inner part of the valve inside the tube and carefully rotate the inflation valve around so you now see the rear of the inner-valve assembly through the valve aperture in the inflatable collar or tube wall.
- You can now unscrew the black rubber cup diaphragm from the spindle by using a pair of long nosed pliers to grip the rubber diaphragm and unscrewing it anti-clockwise. Once the diaphragm has been unscrewed the inflation valve can be turned around again. Remove the masking tape and the old spindle and spring. Ensure all surfaces and valve components are clean and free from dirt or objects that could prevent the valve from sealing once re-assembled.
- Insert the new spindle and spring into the valve, push and turn to lock the spindle in the open position and put a second piece of masking tape over the valve opening to prevent the spindle from falling out. Once again carefully turn the inflatable boat valve around within the inflatable collar or tube so that you can see the rear of the valve assembly, screw the new black rubber diaphragm onto the spindle – finger tight only. Do not use any tools or you may break the spindle.
- Take care not to cross thread or damage the new cup diaphragm.
- Carefully turn the inner valve assembly back round once again and pull the thread of the inflation valve body back through the aperture in the tube wall. Remove the masking tape and screw back on the nut/outer-valve assembly.
- Inflate the tube and check the valve is airtight.
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