Macerator Thru Hull

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12 years 10 months ago #917 by Dave Kuchenbecker
We have a thru hull fitting just below the waterline for the macerator out flow. Unfortunately there is a gate valve not a ball valve on the inside of the thru hull which has now corroded shut. SO I need to remove the valve, which after a breif insppection looks to be carroded to the thru hull fitting also. So I guess that I am left with removing the thru hull fitting and the gate valve. Any suggestions.

Dave

Dream Ketcher

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12 years 10 months ago #918 by Gerry O'Donoghue
Boat in or out of the water?

1. Out of the water; No problem. Grind off the outer flange of the valve (carefully, not to damage gel coat). Whack with mallet and large screwdriver and push in the remaining valve. fit new one.

2. In the water; Much more exciting. If just below the waterline try careening the boat or use the tides if you are in an area with decent tidal range. Then as per 1 above, just work quicker and have all the parts ready.

I removed 13 on TIH and by the last one I got pretty good.

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12 years 10 months ago #919 by Leon Bowles.
If in the water it is probably worth trying to get the valve off the thru hull first, as sometimes they will still come apart even if they look corroded.
Use a wooden bung or similar on the outside or do as Gerry suggested and try to list the boat to the other side, hang dinghy off boom or similar to get it above the water. If you can get a spanner on it or even pliers then hold the securing nut of the thru hull while you are trying to undo the valve so as to prevent any movement of the thru hull fitting.

Geryy, I'm amazed your boat had four thru hulls there up in the bow, or were some transducers?

Leon.

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