Joined on August 27, 2007
Last Post on March 5, 2014
@ March 5, 2014 8:55 PM in straight thread connection?I don't think code allows for different types of threaded fittings to be assembled, without an approved transition fitting, regardless of the pipe dope method :)
If it's not leaking and you have enough "purchase" on the threads to sleep at night....
@ March 5, 2014 8:45 PM in solar loop balancingI doubt that you can dial in the flowrate with the meter in that pump station, that accurately, it's a pretty coarse scale.
Shoot for somewhere between 1 and 1.5 GPM for that 30 tube array and youwill be fine.
@ March 5, 2014 2:03 PM in Got my Sorbox today.we can take a BSP or G thread to just about any fitting or thread you want, NPT, FPT, Press, Sweat, include a add a check, temperature gauge, well, etc into the transtion.
The deal with BSP to NPT is one direction it will work, not so well the other :)
In other words a 1" BSP female will go onto a 1" NPT. But a 1" male BSP", not so well into a 1" NPT, it only catches a thread or two.
Best way to seal a BSP is with a Loctite nut and bolt 545 or 272, commonly used on hydraulic fittings. No need to hemp or floss.
The US is the only country that uses a NPT thread, so it is tough to bring a product from the rest of the planet into the US. Ask Viessmann and Buderus how that works :)
@ March 5, 2014 12:48 PM in Piping questionsSize the unit for the maximum flow rate, and the piping for a flow velocity of 4 fps or less. You can close couple to the tank style hydro separators, I have seen ells connected right to the separators.
The separator itself becomes the "wide spot" in the piping and will allow flow velocity to decrease as it enters.
Typically a hydro separator body will be three times the diameter of the piping connected to it, this provides the "low pressure" zone. which in turn provides hydrailuc, air, and dirt separation.
@ March 5, 2014 12:26 PM in solar loop balancingand what type of controller?
The collector manufacturer will tell you the required flow rate. It depends on the type and size of the collector and how many in the array.
Flat plate style collectors generally 1- 1.5 gpm per collector.
At www.solar-rating.org you can look up your collector, if it was certified. They show the flow rate that they were tested at, to get their output rating.
Most new controllers have a variable speed function, be sure the pump is running at 100% speed when you adjust the flowrate. Adjust it by first selecting the pump speed on the speed switch, use the balance valve to fine tune it to the appropriate flowrate
Read the top of the spinning float until it floats to the top, then read the bottom of the float on the opposite scale.
@ March 5, 2014 12:12 PM in Honeywell air ventpumping towards an expansion tank can cause low or negative pressure at an air vent location, seen in this drawing from "Modern Hydronic Heating" With a high head circ capable of enough delta P you can pull a negative pressure. both air and cavitation problems may occur.
Typically a float type air vent wants a +5 psi pressure to assure a tight shut off.
You can buy anti-siphon caps as a "fixer' or a means to confirm that air is being allowed in at the vent.
A hydroscopic cap is another nice addition for a second level of protection at the vent. If the needle valve shut off fails or gets dirt under it, the hydroscopic cal will serve as a second shut off. And they can be combined, the anti siphon (check valve) cap, and the hydroscopic.
Let me know if you need one to try, I believe the mip threads are common on vents?
@ March 3, 2014 6:33 PM in Caleffi hand pump questionone of the metric hose adapters to a male garden hose adapter. Or send my a mailing address and I'll send you a few.
The metric hose connection is the same pitch, just a shallow thread. Sometimes if you double up the washers and a regular hose will seal.
@ March 3, 2014 6:20 PM in Hot Rodmaybe check your junk file? or send me an e-mail, i sent it Feb. 28 at 2:32.22 PM :)
@ March 3, 2014 2:56 PM in Unequal circulators in seriesif in fact the job does require high head, two 15-58 @$150.00, one 26-99 @ $250.00 (online prices)
Double the 15-58 you get about 34', while a single 26-99 is 29'
But these days you should be able to find a single pump solution, and plenty of VS options.
@ March 3, 2014 9:28 AM in Unequal circulators in seriesare very common. determine the lift and required flow and series two identical pumps to give you the required flow and head.
Most solar controllers have variable speed functions and usually one high head circ will work as ir speeds up for fill and modulated after the siphon is established.
A Grundfos 15-100 covers a lot of DB applications.
@ March 2, 2014 4:55 PM in noisy slab sytemdoes it sound like water rushing thru a pipe/ if so it caused by excessive velocity. ideally you want 2-4 FPS feet per second, flow.
By increasing the pump to a high head type, you are probably increasing the velocity, and noise.
In addition to noise the excessive velocity will cause wear in components and worse case pin holes in fittings.
There are ways to make a tankless behave, but it would require addition components like a separator or buffer tank.
it's tough to get the rated output from most tankless with a pumped flow.
Connected to a potable water system you have somewhere around 60 psi to push through the tankless. with a small or medium circ, maybe 20 psi.
@ March 2, 2014 4:36 PM in New Home, Which heat source????top brand. I believe Marc sells the Windhager. Might be worth a trip to see him.
Lots of wood and pellet burners, and install pics at hearth.com, in the Boiler Room
@ March 2, 2014 3:06 PM in New Home, Which heat source????once you have a load calc number. The plus side of heat pumps is you can get heat, AC, and DHW. With rebates and incentives both the HP and PV to offset it pencils out nicely.
Solar thermal is one of my favorite energy choices. it does require a large array and some sizeable insulated storage to get high solar fractions. Less winter sun and cold ambient temperatures drive down the energy harvest.
Pellets and wood are great, but they do take some owner up keep. I clean my wood boiler every two weeks. A lot depends on the wood or pellets you burn.
I'd start with a tight passive design.
I like a wood fire, on my next home I would install a high efficiency gasification parlor stove in the great room, regardless of what HVAC system I use.
It's nice to have a non electric heating device, during power outages. also they are great for shoulder season or a quick warm up. Most can have a water loop added for DHW or small radiant loads.
A pellet or wood cook stove would be fun also.
Check out some of the cool wood and pellet products Marc sells at
@ March 2, 2014 2:39 PM in noisy slab sytemif you longest loop is 300 feet of 1/2" pex? that is a high head pump for high flow resistance applications, and drainback solar :)
What type of boiler are you trying to pump through? is it a tankless per chance?
@ March 2, 2014 2:30 PM in Fire Sprinkler Protectionlooks like some new regs since I last installed fire protection.
According to this Nobel sheet, only factory blended fluids, and limited %
@ March 1, 2014 10:11 PM in Fire Sprinkler Protectionpropylene glycol is what we used in steel or copper systems. Nobel and others glycol blenders have PG blends for fire protection systems.
The CPVC Blazemaster pipe required glycerine.
The biggest problem we had with glycerin was pumping it when it was cold. It would only pump with a gear pump which was a very slow process. Even when it is warm it's a thick syrup fluid, compared to 50% glycol blends.
Usually when you fill the system there is an air space trapped at every head so the glycerin doesn't always touch the only threaded connection in the CPVC system.
Until a head leaks or discharges :)
@ February 28, 2014 9:35 AM in Plumbing questionis what I use under my sinks, we have old galvie pipe also. Basically it just moves the problem upstream :)
But I get about 1 year out of the filters and spin on a new one.
All sorts of options for cartridges, and large capacity versions. Mine have some carbon to remove some iron odor.
www.filtersfast.com is a good place to look at a wide array of filter choices. And they don't forget to remind you when it's time to stock up1
@ February 26, 2014 9:48 AM in Underground Insulated Pexis another product I have used. Glue the sections together and slide whatever tube you like inside. Include wires and water fill lines also.
With InsulSeal you can remove and replace the tube if needed
@ February 25, 2014 6:34 PM in Has anyone ever heard of this?That heavy duty Advantech floor sheathing shrink about 1/2" in length and width when I cranked up a plate install for the sheetrockers one winter. They wanted it as warm as possible to tape and finish and the HVAC guys wisely did not want to run the furnaces, so I cranked the temperature to the underfloor.
Those I-joists are typically stored outdoors and could take on moisture and swell, with enough heat I'd guess they would shrink down like the other manufactured wafer, chip, or ply type materials.
Not sure where that 1/2'' dimension changed?
@ February 23, 2014 9:39 PM in Underground Insulated PexWatts Radiant and Rovanco
@ February 20, 2014 8:31 PM in Looking for book recommendations!Modern Hydronic Heating is a text book built to go along with the classes Siggy and others teach at MVCC. With some basic math skills it will take you from zero to a knowledgable designer. Be sure to do the exercises at every chapters end to assure the concepts stick.
As important are practical skills, these are not so easily learned from the pages. It you have good mechanical skills and proper tools, you can pipe a system.
We have seen plenty of top notch installations here on The Wall, installed by mechanics, welders, electricians, carpenters, and other trade skills.
Consider a pro for venting and fuel piping to assure it is correct, safe, and meets local codes
@ February 19, 2014 4:40 PM in Looking for book recommendations!Has some good training materials. Most radiant manufacturers have great design books. Uponor, Viega, Watts, mr Pex, Roth, Heatlink, etc. Caleffi I-dronics design journals cover many topics available as a free download www.caleffi.us