WH pressure relief valve & wall thickness - R-pod Owners Forum

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furpod

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Joined: 25 Jul 2011
Location: Central KY
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Topic: WH pressure relief valve & wall thickness
Posted: 28 Jun 2013 at 10:16am

Just for fun..

Kaboom

TrinityTurret View Drop Down

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Posted: 13 Oct 2013 at 10:20pm

Anode rod shoots out like an arrow?

I'm investigating draining the water heater, but came across videos & posts about people who simply unscrewed the anode rod and WHOOSH, the rod shot out like an arrow. Do NOT want that to happen to me. So, to remove that built-up pressure, if I simply open the hot water knob on the sink, will that be enough to avoid this happening?

There's only one way...

Bill-GA

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Joined: 13 Jan 2012
Location: Cumming, GA
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Posted: 13 Oct 2013 at 10:31pm

Originally posted by TrinityTurret

Anode rod shoots out like an arrow?

I'm investigating draining the water heater, but came across videos & posts about people who simply unscrewed the anode rod and WHOOSH, the rod shot out like an arrow. Do NOT want that to happen to me. So, to remove that built-up pressure, if I simply open the hot water knob on the sink, will that be enough to avoid this happening?

Make sure the heater tank T-values are in the Heater position (normal) so the pressure will bleed out thru the sink faucet.

Bill & Bev
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Keith-N-Dar View Drop Down

podders Helping podders - pHp

Joined: 03 Apr 2011
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Posted: 14 Oct 2013 at 5:35am

Originally posted by Bill-GA

Originally posted by TrinityTurret

Anode rod shoots out like an arrow?I'm investigating draining the water heater, but came across videos & posts about people who simply unscrewed the anode rod and WHOOSH, the rod shot out like an arrow. Do NOT want that to happen to me. So, to remove that built-up pressure, if I simply open the hot water knob on the sink, will that be enough to avoid this happening?

Make sure the heater tank T-values are in the Heater position (normal) so the pressure will bleed out thru the sink faucet.

Yes, what he said. but you do need to open the tap to drain the pressure.

Mine didn't shoot out like an arrow, but I did get a face full of water the first couple of times I removed it. Now I open the tap and remove the pressure.

Keith-N-Dar
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kymooses

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Posted: 14 Oct 2013 at 10:46am

I always drain mine through the low point drains. No pressure and then very little water splashing me when I remove my anode rod.

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asreichler View Drop Down

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Joined: 30 Jul 2013
Location: austin tx
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Posts: 35

Posted: 14 Oct 2013 at 6:09pm

An interesting fact

The change in volume is not a constant. The density of water changes with temperature.

You should be able to calculate the change in volume using data on the specific volume of water at 60° F (0.01603 cubic feet per pound) and 90° F (0.01610 cubic feet per pound).

The percent increase is 0.01610/0.01603 = 1.0044.

This would be a 0.44 percent increase in volume.

Source:

http://www.engineeringtoolbox.com/water-...

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Allen

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Jdub

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Posted: 14 Oct 2013 at 7:02pm

How does the rod vanish? Is there a core that doesn't dissolve?

I took the rod out to empty the tank and it is very thin at the base but still fat in the middle and end. Is it going to just fall off, or it there a core that remains no matter what? This is after only one summer.