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Larry Weingarten

Larry Weingarten

Joined on August 26, 2003

Last Post on August 27, 2014

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@ July 3, 2013 1:39 AM in corrosion on hot water tank inlet

... a lot looks wrong here.  With melted insulation, drafting is a problem.  It is either negative air pressure in the building, pulling heater fumes back, or a partly blocked flue.  In either case the poorly sloped vent makes it worse. ~~ I didn't like the look of the vent pipe to draft hood connection.  The vent should not be crimped and should go over the draft hood. ~~ I'd rather see lined steel nipples or brass used in the tank, then to flex connectors, rather than copper pipe directly to the heater. This would help prevent galvanic corrosion. ~~ The water might be condensation or it could be a leak.  You might want to uncover the pipes and mop up any water to see if you can find where it comes from.

Yours,  Larry

Is there any way...

@ June 30, 2013 11:57 AM in asphalt laminated kraft paper and staple up radiant floor heat

... you can hook up an electric water heater to the tubing in a room and heat it up?  That would give you an answer pretty fast.

Yours,  Larry

cross connection

@ June 16, 2013 2:06 AM in Plumbing Forum?

Hello:  It sounds like water is leaking from hot to the cold side of the plumbing, but testing for it will give you some more info to work with and help in the fixing of it. 

To test for cross connection, turn off water to your water heater.  If it's electric, turn off power, if gas turn to pilot.  Open a hot tap somewhere other than the shower and see what it does.  If there is no cross connection, the water will run only a little, then stop.  Otherwise it'll keep running.  If it runs, go back to the shower and listen for a high pitched ssissing sound.  Let it run a few minutes.  Stop the test , put things back as they were and then run hot water at the shower.  If the valve is cold and runs cold for a while first, you know that cold water came from testing and that there is a cross connection at the shower valve.

From there it's valve seats and/or washers/seals that are leaking.

Yours,  Larry

ps.  100 psi is too much.  40-60 is considered normal and is easier on the plumbing.

Mark is spot on

@ May 8, 2013 12:21 AM in Copper pipe pitting

Hello:  Thr Copper Development Association has done loads of research on pitting corrosion.  Here is a link to over 600 papers on it.

Yours,  Larry$5bqueryType$3dbasic:copper$3b+sortType$3drelevance$3b+searchTerms$3d$5b$3cAND$7ccitationBodyTags:pitting$3e$5d$3b+searchParameters$3d$7bNAVIGATORS$3dsourcetypenav,pubtitlenav,objecttypenav,languagenav$28filter$3d200$2f0$2f*$29,decadenav$28filter$3d110$2f0$2f*,sort$3dname$2fascending$29,yearnav$28filter$3d1100$2f0$2f*,sort$3dname$2fascending$29,yearmonthnav$28filter$3d120$2f0$2f*,sort$3dname$2fascending$29,monthnav$28sort$3dname$2fascending$29,daynav$28sort$3dname$2fascending$29,+RS$3dOP,+chunkSize$3d20,+instance$3dprod.academic,+ftblock$3d3+670835+194145+660848+670832+194003+194000+660833+145+740834+740833+670826+660843,+removeDuplicates$3dtrue$7d$3b+metaData$3d$7bUsageSearchMode$3dBasic,+dbselections$3dallAvailable,+fdbok$3dN$7d$5d?accountid=26849

There is a heat pump...

@ April 6, 2013 11:05 PM in More efficient water heater.

... water heater from Australia that captures waste heat from grey water. Called Nexus,  it doesn't have the potential downside of chilling water that will need to go for bathing.  It's still a new idea, but has potential.  Here's a link.

Yours,  Larry


@ March 2, 2013 7:26 PM in Gas light parts

... is the last maker of gas lights I know of.  I'm pretty sure they are still in business.

Yours,  Larry

The things I'd check...

@ March 2, 2013 7:17 PM in John wood h20 heater leak

... are Water Pressure, (make sure there is no pressure spike caused by thermal expansion, or just plain high pressure)
Conductive Water usually caused by over-softening, (makes the anode rod get used up way too fast), 
Quick Closing Valves can cause damaging water hammer,
High Water Use can put the heater in condensing mode so much that it rusts out from the fire side (get bigger heater). 

I'm curious to know where the heater leaked.  Overhead plumbing leaks are tough on heaters too!

Yours,  Larry

Three things..

@ February 16, 2013 2:08 AM in What business lessons did you learn from the Great Recession?

1. History does repeat itself.  The stuff my grandparents learned in the Great Depression fits nicely now.
2.  Trust your community.  This is a community.  If you don't have much of a local one, think about how to make it happen, because there is more security there than in any gubermit program.
3.  Live below your means.  It's an interesting challenge to see how low you can go.

That's my three!

Yours,  Larry

Might be fun...

@ February 8, 2013 3:46 AM in Cloudy hot water

... to see if you get the cloudy water at the hose bibb on the incoming main line.  If so, installing an air separator could be useful.  It would need to take the line pressure and not be able to rust of course!

Yours,  Larry

Three things

@ January 26, 2013 8:46 PM in Sewer smell mystery...

Thing #1.  Make sure that any closets are true closets and not converted from showers.
Thing #2.  Hope nothing crawled into a wall and died.
Thing #3.  Pour bleach down any  nearby shower drains.  They can make you gag sometimes.

Yours,  Larry

Gas Pressure

@ January 25, 2013 1:12 AM in Rinnai tankless woes

Hmmm:  As gas pressure is so important for tankless heaters, I wonder how difficult it would be to have a "low gas pressure" error code?  It would make life easier for everyone but the installer who didn't pay attention to gas line sizing.

Yours,  Larry

here's a test

@ December 29, 2012 10:49 AM in Electric WH insufficient heat

Hello:  Try this.  Run hot at the shower till it gets as hot as it will. Shut it off and go run hot somewhere else and shut it off.  Now, go back to the shower and run hot.  Does it start out cold?  If so, you know cold filled the hot line and there is a cross connection.  I've met the problem with Moen and Grohe valves.  The polysulfone Moen cartridges replace the brass ones and get rid of the problem... which is nice!

Yours,  Larry

For years...

@ December 28, 2012 12:05 AM in Anode rod

... I measured conductivity between tank and anode that I'd installed with teflon and never found one that didn't conduct.  Went back on many of them years later to find the anode being consumed as it should be.  It seems it should be an issue, but it isn't.

Yours,  Larry

Just to be sure...

@ December 27, 2012 11:58 PM in Electric WH insufficient heat

... check hot water temperature as it leaves the tank to be certain the problem is in the tank.  A cross connection in the plumbing could cause your 106 degree reading.  If it is only 106 leaving the tank, check elements with an ohm meter to see if there is any leakage to ground.

Yours,  Larry

Wierd idea

@ December 18, 2012 1:26 PM in coyote vs road runner application

How about moving the boiler up towards the top of the building, so it runs at the pressure it should?  Piping lower down can take 90 psi without problems. This is a Henry Gifford idea. 

Yours,  Larry

You might want to...

@ December 18, 2012 1:14 PM in inefficient re-circulation line

...check out the commercial version of demand pumping at:  They use a combination of tenant demand and loop temperature to limit operation and reduce losses.  I'd still insulate everything I could get to!

Yours,  Larry

Sounds like crevice corrosion

@ November 26, 2012 11:39 PM in plumber-homeowner-contractor

Have a look here for a description.  Fixing it is a whole nuther  problem, though knowing what it is should help in finding an answer.

Yours,  Larry


@ November 19, 2012 11:43 PM in Congratulations Gramps!!!!!!!

Life can be a see-saw, from really bad to really good.  Monster storm to new grandchild. Trust everyone is in good health and great spirits!

Yours,  Larry

Part of advertising...

@ November 19, 2012 11:34 PM in Advertising methods

... seems to be to get your name out there every way possible.  When your prospective client sees it enough (in theory) they become more comfortable with and likely to buy from you.  A single ad on a car or a blimp isn't likely to make someone who has never heard of you buy your product.  When you surround them with your name, you are more likely to get a call when they need your service.

Just imagine the opposite.  Do nothing to get your name out there and see how dusty your phone gets.  Personally, I've found word of mouth is tops for getting good clients.

So, to answer your questions, no, an ad on a car wouldn't make me call.  But, even if a tractor pull is energy inefficient, if your prospective clients like tractors, that's the place to advertise.

Yours,  Larry

50 psi...

@ November 15, 2012 12:54 AM in Hot Water Pressure

... doesn't call for a pressure reducer.  Put a gauge on the tank drain valve and let the tank heat from cold.  If you get up to 80 psi or more, it's time for an expansion tank on the cold side.

Yours,  Larry

Starting at the beginning

@ November 12, 2012 5:27 PM in Hot Water Pressure

What's the cold water pressure?  From there, put your gauge on the drain of the tank and measure static pressure.  It should pretty much match the cold pressure.  Now run hot water.  Does the pressure at the tank fall off significantly?  How about if you open multiple taps?  This will help identify where the restriction is or isn't.  From there it's following on down the hot lines to find out where the pressure drops off.  Do let us know what you find.

Yours,  Larry

thanks Carl

@ November 8, 2012 9:09 PM in What Are the Causes of Water Heater Element Corrosion?

If the elements are failing repeatedly, it might be time to try a different type.  Most heaters come with a less expensive element. that has a copper sheath. They also are usually a "high watt density" style.  This forces more heat through a smaller element surface area, speeding corrosion in acidic or aggressive waters.  Elements also come with a stainless or nickle alloy sheath which holds up better. 

As Carl suggests, do check the anode/s in the heater to make sure "Demon Rust" isn't having a good time in your heater at your expense!

Yours,  Larry

ps.  If the elements you're replacing are covered with scale, understand that chemical reactions in general, double their speed with every 20 degree rise in temperature.  Scale on the element slows heat transfer, speeding up damage to that element.
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