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hot rod

hot rod

Joined on August 27, 2007

Last Post on September 1, 2014

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Doesn't AO Smith

@ August 3, 2014 9:39 PM in Emerson swan

own Lochinvar? I suspect you will see some really cutting edge tanks and boilers from them also. You already do, actually.

good reading here

@ August 3, 2014 3:56 PM in How would you....? (daycare mixing)

Any idea what the max GPM that will be required? On large flow buildings it may be best to use a Hi-Low mixer. It's hard to find a hi flow, large Cv valve that will regulate down to .5 gpm.

Your building official should be able to point you to the code they use. Day care centers sometimes limit to 100F for hand sinks, so a point of use 1070 valves may be needed at fixtures, with a point of distribution 1017 back at the water heater.

ASSE is a fairly complicated standard, and it changes every few years. Get the requirement from the AHJ. Manufacturers may not spec the valve as code requirements vary depending on codes used and AHJ moods :)

Typically a mix of ASSE 1070 and 1017 valves will work.

If there is a recirc loop in the building you need to be sure it is piped correctly with thermostatic mix valves.

Idronics 11 has some good info and piping schematics.

How often

@ August 2, 2014 4:40 PM in Micro-load Dilemma: Add Storage or Nuclear Option

does the small zone call by itself?

How often does the boiler fire, and how long does it run when that load calls.


@ August 2, 2014 12:04 PM in Condensing cast iron?

has been around for 6 years or so. No personal experience

wrong thread

@ August 2, 2014 12:01 PM in Utica


@ July 31, 2014 5:48 PM in Evenflow Ball valves brass 600psi WOG

external force

@ July 31, 2014 5:37 PM in Evenflow Ball valves brass 600psi WOG

could have pulled that apart. Looks like some sort of hose quick connect on the other valves.

Merely tripping on a hose could put enough force to pull that shallow, fin e, soft thread assembly joint apart.

A big difference between a 3 dollar and 12 dollar valve. looks like an industrial quality valve with proper support is called for? Along with suggestions from Ice regarding environmental conditions.

surface area

@ July 31, 2014 10:07 AM in Pool heating

is what heat transfer is all about. Look at the flat plate pool HX also, you get a lot of heat exchange surface in a small HX. They can be built and sized for close approach and low pressure drop.

Need to know what temperature you have on the A side, those tube and shell need pretty good delta T with small square footage surface area, to give you high output.

that is common

@ July 30, 2014 8:51 PM in Evenflow Ball valves brass 600psi WOG

to stamp the country of origin under the handle. Have you contacted Everflow, I suspect they will want the failed ones back for evaluation.

Send a new one out to a lab for testing, should be easy to find the fail point on a test bench.

What is the application? Is it possible the pressure exceeded 120? Any gauges on the system.

do you mean EverFlow?

@ July 30, 2014 4:31 PM in Evenflow Ball valves brass 600psi WOG

They are located in NJ, could be a China import, it should be labeled country of origin, but there are way around that,

"PRC" is one way I have seen around putting China on a valve, People's Republic of China.

You can still get domestic brass, if you request it. Most of the big name manufacturers offer import and domestic.

Or top quality Italian ball valves.

What was the failure?

I really like

@ July 29, 2014 2:57 PM in thread sealant

this 3- Wrap tape from Mill Rose. You really do not need to add any dope with it. Great for rough threads, and comes off the roll better, to the very end.

how much?

@ July 29, 2014 2:48 PM in Advice on adding zones

flow will you be trying to move.

Assume you boiler runs 80% efficient, you have around 125,000 BTU available to move.

A heat load calc would determine what the home actually needs for BTU/hr on design condition. Could be that boiler is oversized for the load to begin with.

Assume the main area needs 90,000, 9 gpm at 20° ∆T

Here is what the pressure drop with a 3.5, and a 7.5 Cv valve, looks like. The third box shows pressure drop with a known Cv and flow rate.

So you need to do some number crunching to get an exact answer to your question, a load calc to start. It's good info to have, an accurate load calc, everything sizes around that critical number.

Those old, large pipe conversions generally do not need a lot of flow, or present much pressure drop.

sensor well

@ July 29, 2014 9:28 AM in Boiler Room Layout Mock-up – reasonable, flawed or both?

is that brass plug at the top of the Sep 4 pictured.,

Best air & dirt removal is with a media inside the LLH. Also magnets can only be applied on the outside of brass or plastic components. You would not want to strap a magnet on a steel LLH.

how large

@ July 28, 2014 10:42 PM in Bathroom heating options

or a radiator do you want to build?

I believe 24- 30 wide with type M would be fine. No towel I know of could bend that, nor a small child.

The key would be solid mounting to the wall studs.

You can also make a nice towel rad with these base branch manifolds from Watts radiant.

The base branch model is 48" long and has 1/2 brass sockets to take 1/2" copper. either 3 or 4" on center.

They use to make an all brass version, brass tube, brass sockets

Cap two opposite legs, supply lower bottom, return from top, add a small hygroscopic vent at the top.

Here is a section of an old one I have kicking around for example.

DIY towel bar

@ July 28, 2014 2:50 PM in Bathroom heating options

I built this super-sized one several years ago. Square and round steel tubing, a holesaw and cordless drill. I had a professional welder do the MIG welding. Powder coated white by a neighbor with that equipment.

Easier still is copper tube and tees. If you use 95/5 you can powder coat copper also. I have a powder coated, copper coat rack that has been outside for 8 years or more.

They need to watch the oven temperature carefully the powder melts real close to the solder melting temperature :)

Better air and separation

@ July 28, 2014 2:33 PM in Boiler Room Layout Mock-up – reasonable, flawed or both?

agree with Chris, look into a multi purpose device to provide hydro separation, air, dirt, and magnetic separation.

Also the expansion tank connection needs to be were all pumps "see" the PONC.

More reading in this just released tech journal.

Also if you don't want to give up on the TRV at the rads, Anvil sells double threaded left hand nipples. Cut the threads off, weld in a 1-1/4 X 1/2" bushing. It's easy to build those LH conversion fittings.

An example, before welding.

Bio-Therm green house systems

@ July 26, 2014 7:35 PM in Radiant Heat Matrix Other Than Concrete.

I installed one of these systems in a hydroponic green house many years ago. Fired with a wood boiler, here in Missouri.

The tube was installed under the gravel floor, with an additional unit heater for extreme days. You might look around their site for sizing and load info.

The heated benches make a lot of sense, keeping the root zone area warn not the entire structure.

GEO grip

@ July 26, 2014 7:26 PM in How Long

is a fitting developed for PE tube that does not require heat fusion. Available as brass or plastic, many configurations. Most often these are CTS as ice mentioned.

into 5 gallon buckets

@ July 26, 2014 9:26 AM in Cut oil tank in half, now what?

and most auto parts stores take used oil, antifreeze and solvents, for free.

If you have a Safety Kleen nearby they will take it and give you documentation.

Check with State, City, or County websites they usually have recycling centers for all sorts of stuff listed.


@ July 25, 2014 4:29 PM in Radiant Heat Matrix Other Than Concrete.

Is the most powerful way to move the thermal energy from pex tube. If you are considering a base rock type gravel, which has "fines" or sand that would transfer better than washed gravel

Really base rock is concrete without the Portland cement in the blend, and water to activate the mix

I too would use a concrete slab, gravel over if needed.

Be sure the tank you put in the ground is rust resistant. If it is steel, it needs to be coated like the underground LP tanks Also anode protection.

Almost looks like

@ July 25, 2014 8:51 AM in How Long

Someone tried to glue an electrical PVC ell onto it. The tube exposed to sun or UV for that long may not be in good shape,

could be the hx

@ July 24, 2014 3:01 PM in Lochinvar sheild HIgh limit problem

is getting limed up, check the temperature drop across the HX, see if it matches factory specs.
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