Ian

Take a minute and determine how the valves are leaking. If the H2O is
dripping around the edge of the plug then this is completely normal
and can be fixed easily. Buy a tube of lip balm (Chapstick in USA)
open the valves and put a good coating around inside the wing on the
lip were the metal plug seats in the opening. Then close the valves
with a snap and your leak is no more. Do not use grease as it washes
away and is a mess. If they still drip a little use the red tail pin
removal tool to seat the plugs by screwing it into the bottom of the
plugs and pulling a bit to seat them. After a few treatments you will
be leakless all summer.

If the valves are leaking past the root wing rib into the cockpit area
then it may be a corrosion problem with the water ballast control rod
that drives the valves - and that is a bigger, more expensive problem.

John Seaborn
Ventus 2b
USA



"tango4" wrote in message ...
The dump valve on my Nimbus 3 are leaking - one leaks about 10 litres
overnight, another 10 litres an minute, the others somewhere in between.
I'm looking for help on how to go about sealing them better.

I will get some new springs manufactured to push the valves closed but I
would appreciate help on how to renew / refurbish or repair the existing
seals themselves.

Tkx
Ian