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Walters V-drive drain plug size.
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2001SAN View Drop Down
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    Posted: December-08-2012 at 3:16pm
Hi all,

When draining my v-drive the plug on the back 'pinged' off after half a turn. Looks like the hole is either threaded or the plug itself is at fault. The plug itself is pretty crusty at the bottom and i'm thinking this might be preventing it from catching.

Anyone know what size this plug is? This is the one on the rear of the unit and is slightly larger. I read 1/4" NPT but wanted to double check.

Hope this makes sense - typing in a hurry!

D.
A little knowledge is a dangerous thing...

2001 Super Air Nautique
1989 Fairline Corniche 31

www.bannrivercruises.co.uk
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2001SAN View Drop Down
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This is the drain plug for the water by the way - just in case there's any confusion!
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2001 Super Air Nautique
1989 Fairline Corniche 31

www.bannrivercruises.co.uk
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8122pbrainard View Drop Down
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1/4" NPT will be about a 1/2" hole. 3/8" will be about a 5/8" hole. Get a tap and chase the threads. I suggest using a brass plug as a replacement.


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2001SAN View Drop Down
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cool. looks like 3/8 actually.

thanks,

d.
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1989 Fairline Corniche 31

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2001SAN View Drop Down
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Originally posted by 8122pbrainard 8122pbrainard wrote:

1/4" NPT will be about a 1/2" hole. 3/8" will be about a 5/8" hole. Get a tap and chase the threads. I suggest using a brass plug as a replacement.


chase with a regular tap or a 'chaser'?

d.
A little knowledge is a dangerous thing...

2001 Super Air Nautique
1989 Fairline Corniche 31

www.bannrivercruises.co.uk
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8122pbrainard View Drop Down
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Regular tap.


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2001SAN View Drop Down
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Cool. Thanks.
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2001SAN View Drop Down
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one more question. any tips on using the tap asides from going in straight? will a cheapo tap do do? is one 1/4" npt tap the same as another.

never done this before so please forgive my ignorance :)

d.
A little knowledge is a dangerous thing...

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1989 Fairline Corniche 31

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2001SAN View Drop Down
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Like this one?

It says for repair of existing threads?
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1989 Fairline Corniche 31

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8122pbrainard View Drop Down
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Originally posted by 2001SAN 2001SAN wrote:

Like this one?

It says for repair of existing threads?

Yes, that will work. All you want to do is clean up the threads so when it gets tight, go about one more revolution. If you go too deep, the taper will make the female threads too large.

I suggest replacing the plug with a brass plug.


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2001SAN View Drop Down
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Brass plug is here based on your advice.

Thanks Peter.
A little knowledge is a dangerous thing...

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1989 Fairline Corniche 31

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