stuck fresh watertank drain valve

forgeron · 2026-05-13T21:53:05+0100

T6 california ocean. Our fresh watertank leaks through the drain, although I had it closed. I filled the fresh watertank and closed the drain several times. But the water keeps leaking and in half an hour the watertank is empty. I noticed that when I turn the valve anticlockwise it does not make the full 90 degree turn. Like something got stuck in the faucet at the bottom. The dealer could not easily reach it, but said it could be costly because they woud have to remove the whole tank! Tried again to open/close the valve several times, flushed and filled the tank several times, even tried to use a water vacuumcleaner with a hose through the filling pipe to suck the thing out. Is there a way to reach the drain from underneath and blow the valve clean? or any other suggestions?

edocali · 2026-05-14T00:32:54+0100

Perhaps if you follow the thread about replacing the pump - you may be able to stick your arm inside the tank and feel if there is something stuck in the waste ?

WelshGas · 2026-05-14T08:37:48+0100

forgeron said:
T6 california ocean. Our fresh watertank leaks through the drain, although I had it closed. I filled the fresh watertank and closed the drain several times. But the water keeps leaking and in half an hour the watertank is empty. I noticed that when I turn the valve anticlockwise it does not make the full 90 degree turn. Like something got stuck in the faucet at the bottom. The dealer could not easily reach it, but said it could be costly because they woud have to remove the whole tank! Tried again to open/close the valve several times, flushed and filled the tank several times, even tried to use a water vacuumcleaner with a hose through the filling pipe to suck the thing out. Is there a way to reach the drain from underneath and blow the valve clean? or any other suggestions?

If you look at the enclosed Diagram. Part 13 is the drain valve and Part 21 is the combined Gas Dropout and Water drain outlet .