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[slosh250]

anyone have any experience with the armstrong E series pumps, was looking at the E9 as the primary and maybe E8 or E7 for my DHW. Any input would be great. I have about 80-90 ft between the HX and boiler. Also same for hot water heater.

[Scott7m]

Yea they are great pumps but why not just one set of lines and one pump and install a 20 plate exchanger, it's simpler and works much better

[RSI]

I never used them but they look like nice pumps. I use the B&G PL series because they are pretty much the same but cheaper.

[slosh250]

The only reason is the budget right now, as you know i purchesed a used hardy h2. I already have the lines that were new when i bought the h2. Second reason i have no knowledge of how the plate exchanger works, also why are these pump better than a taco but are cheaper? What would the recomended size's be for the run i have? Sorry for all the Q's i'm a newbie.

[RSI]

What size Taco are you comparing it to? An E9 will be at least $250. A B&G PL36 is closer to $200

The Armstrong E series, Bell and Gossett PL series and Taco 2400 series are all dry rotor pumps. They use 30 to 50% less power than equivalent size wet rotor pumps.

A dry rotor pump is pretty much just an ordinary motor with a shaft seal where it enters the pump housing. The only moving part of the pump that is in contact with the water is a little bit of the shaft and the impeller.

A wet rotor pump has the rotor pretty much floating on water. The magnetic field to turn the rotor goes through the water and there are no liquid tight seals on any rotating parts.
There isn't a lot of clearance so dirty water can freeze them up or wear the rotor. If run dry they die fast.  They also have a bushing at the end than gets chewed up from dirty water.

[slosh250]

Comparing it to a 009 which is common for the hardy h2 i guess? Seen one for sale (new) for 120 for the E9. Going to keep that a secret as there is only 1 left    We have a little lime but i dont think its that bad.

[RSI]

Is it new? If so, that is a steal.

[slosh250]

Yea just a opened box. Should i go for it? would it support the 80-90 ft in 3/4 pipe to a 18x20 HX ?

[RSI]

It should work much better than a Taco 009. If you don't buy it, let me know and I will.

[slosh250]

thing is he only has 1 and i want to run all the same pumps if possible so.

[Scott7m]

thing is he only has 1 and i want to run all the same pumps if possible so.

You def don't need that good of a pump for your applications...  A taco 007 would likely do it given your 3/4 set up..  They have a 3 year warranty and are usually like 70 bucks

[RSI]

The 3/4" might be a problem for something as small as a 007.

The pumps have universal flanges so not really any need to keep them all the same. They could have the flanges rotated 90 degrees though so you would need swivel flanges if you want to interchange them.

[Scott7m]

Maybe so rsi, I see the hardy dealer here puts them on his installs

[RSI]

They put a single 007 on a 90' run of 3/4" pex? They can be doing more than a couple GPM.

[slosh250]

Now i'm really confused. If the taco 007 are so cheap and would work why couldnt i go that route? What was on the unit was a 009 and it was ruined beyond repair. so i was figuring thats the equivilent that needed to go back on it. The house is the most important and would be used the most, shop would be set on 45 or so and turned up when i want to tinker. its the same pull and hx. hot water heater just used at night and dishwasher. I am all new to this and on a tight budget but also want to make things last. thanks for your input