Tight tap.

After reading HungryJOes' plight re the leaking Petcock ( we call them petrol or fuel taps ) I have some mild concern.
One of the taps on my fibre glass tank has a slow leak, but is so tight that I am afraid that I will do damage trying to undo it.
A... The tap has already been rounded off a little by P/O, and and can't get a good grip.
B... I 'm frightened that if I do get a good grip, that I'll crack the Tank.
I'm guessing they are pretty strong, but......
Are there any experienced Tap Removal Technicions with us here today.
AC.

Brute force is the way to go. The bung in the tank is pretty well set in the fiberglass. There is another part, like an adapter, that screws to the bung and that may be the source of your leak. You may find that removing the tap will take out that adapter also, after that you can clutch it in a vice and take the two appart. Clean all the parts and if possible chase the threads on the adapter, it is a British pipe thread (I think it's ½" X 19TPI *) and epoxy it to the bung in the tank.

Jean

* The Brits seem to have a fascination with prime numbers, why is that :?:

I knew someone was going to say that.
Thanks Jean.
AC.

1/4" BSP, 19 TPI, Major O/dia. .518", Minor dia. .4546"
When threads were threads & men were men.
Now, if you can't do it with a Laptop, it can't be done.

Why not warm that tap up a bit? For obvious reasons you don't want a torch on it, but a soldering iron on it until it is warm to the touch, or for that matter a clothes style iron borrowed from the linen closet. Too hot and you will be melting the fiberglass, but I wouldn't be afraid to get it up to just a bit to warm to leave your finger on it.

Russ