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 > Hot water tank drain plug

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Bionic Man

Colorado

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Posted: 08/26/21 07:17am Link  |  Quote  |  Print  |  Notify Moderator

Open the vent on the hot water heater and your low point water drains. The water will then drain from the heater. Or at least mine does.


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valhalla360

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Posted: 08/26/21 07:39am Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Drain plugs are easy to get out with proper sized socket on an extension.


This.

If you are trying to fit a crescent wrench or some other makeshift tool, it's a hassle.

Get a proper sized socket and extension and it's easy.

One issue is valves don't like sit for months on end without use. They corrode, freeze up and gunk up.


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Dick_B

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Posted: 08/26/21 08:06am Link  |  Quote  |  Print  |  Notify Moderator

Flush with something like a Tank Saver from CW or Camco Tank Rinser.


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Gdetrailer

PA

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Posted: 08/26/21 08:25am Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:


Drain plugs are easy to get out with proper sized socket on an extension.


Eazy peazy with correct tool.

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Granted, this works great on Attwoods, not sure about Suburbans.

The plug I have takes a 7/8" socket, I only have that in 1/2" wrench.

I use a shorty extension which almost enough to get outside of the water heater. It is just long enough to get ratchet on it.

Since I have that in 1/2" wrench, I do have to be very careful about not overtightening the plug.

For installing the plug, I hand start it to prevent cross threading, then use ratchet to lightly tighten.

I do not use any thread sealants or Teflon, those will change the torque characteristics and make it easy to over tighten and damage the plug.

I believe there is a purpose made tool you can buy for this which may be better than a 1/2" ratchet which would be less likely to strip the plug.

I kind of like the plug on the Attwood, I did have a Suburban which had a petcock valve. That valve was so difficult to get sealed and when it came time to drain, I was always scared that the top of the valve was going to break off. Had to use channel lock pliers to open and close the petcock valve.

BluegrassBill

Woodland, Wa. USA

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Posted: 08/26/21 08:44am Link  |  Quote  |  Print  |  Notify Moderator

FYI, After draining there is still a couple of inches of water in the bottom of the tank. I use a small siphon hose to get as much out as I can. X2 on socket, Extension and ratchet.


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enblethen

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Posted: 08/26/21 09:47am Link  |  Quote  |  Print  |  Notify Moderator

I use a six inch extension. Makes it easier getting plug started. Don't put it in too tight!


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ronharmless

The far side

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Posted: 08/26/21 10:39am Link  |  Quote  |  Print  |  Notify Moderator

I replaced my plastic drain plug with a plug made of the same material as the pressure relief valve at the top.

Gdetrailer

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Posted: 08/26/21 10:41am Link  |  Quote  |  Print  |  Notify Moderator

BluegrassBill wrote:

FYI, After draining there is still a couple of inches of water in the bottom of the tank. I use a small siphon hose to get as much out as I can. X2 on socket, Extension and ratchet.


Granted, there will be a small amount of water below the lip of the plug opening, but.. It isn't enough water there to warrant trying to figure out how to remove that water.

In a nutshell, the water level is sufficiently low enough that even if it freezes, the expansion of the ice is not confined and no harm will come of the tank.

It is all about giving the ice enough space to expand without causing damage.

When the ice is restricted and has no place to expand that is when damage happens.

Think of what happens when you freeze a water bottle. If you do not open the water bottle and remove a small amount of water before freezing the ice will expand enough to break through the weakest point of the bottle.

Now, if you open the bottle, remove as little as a 1/2" of water you can safely put the bottle in the freezer and freeze the water solid with no harm to the bottle.

enblethen

Moses Lake, WA

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Posted: 08/26/21 10:47am Link  |  Quote  |  Print  |  Notify Moderator

I would flush out the tank to remove debris in bottom of tank. Debris could be in the form of sand coming in through plumbing water system. Won't be much but can build up.

bob213

Fresno, CA

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Posted: 08/26/21 11:27am Link  |  Quote  |  Print  |  Notify Moderator

Bionic Man wrote:

Open the vent on the hot water heater and your low point water drains. The water will then drain from the heater. Or at least mine does.


Draining thru the low point drain is a good way to get all that sediment in the tank into your water lines. I would avoid that method.


You can avoid reality, but you cannot avoid the consequences of avoiding reality – Ayn Rand


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