A problem with alkaline buld up in the thru hull inlet
Here's the problem. On the weekend the aft head was not filling on the inlet cycle of the Tecma.
Finally tracked the problem to a build up of a white hard scale on the inside of the copper pipe which is bonded to the Brass thru hull fitting. Five minutes soaking in some acid disolved the scale and all is well. However this is the second time in a year this has happened to that* loo.The forward loo ,same brand, is not affected.
The boat is on shore power at the dock in a salt water environment,earth *bonding seems in *good condition.
I'm a little concerned as to why this is happening,and wondering if I should have been paying more attention in Mr Jacobson's chemitry class all those years agp.