Low pressure drop, hot water filter?

[damon_sisk]

My system (installation in progress) consists of an EKO 40 and two 500 gallon (old propane) tanks storage. I put the boiler in my garage so that I don't have to carry wood trough the house. I decided to use a plate heat exchanger between the boiler and tanks, mainly so that I would not need enough antifreeze to treat the 1000 gallons of storage, just enough for the boiler loop. BTW, the tanks are insulated and buried below the frost line, so no need for antifreeze in the storage tanks.
Since there was no good way to clean out the tanks before installation, I want to install a filter on the tank (storage) side of the heat exchanger.
What filter housings are available that can take the hot water temperature (~190F), but produce low pressure drop (obviously depends on the filter)? I'd like to stay away from stainless to minimize cost.

 

[Mid Michigan]

I am not sure about filters but here is a strainer that you can use. Pull the screen every now and then to clean. You can probably even find them cheaper.
(broken link removed to http://cgi.ebay.com/FNW-510-Bronze-Y-Strainer-400-WOG-wStrainer-Ends-1-NEW_W0QQitemZ290353259259QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item439a6722fb)

 

[Gooserider]

That type of Wye strainer will work, but not particularly well... They are prone to clogging if you have a really dirty system, and don't filter all that fine of a particle size. Up side is they are reasonably cheap... Note that you will want to put a shutoff valve on each side so that you don't drain the system when cleaning out the trap...

Caleffi (and other manufacturers I'm sure) make a line of dirt and air separators that are claimed to be more effective at removing fine particles, and have actual drain valves on them to allow cleaning out w/o as much difficulties...

(On the page linked, look for the DIRTCAL Dirt Separator Series 5462, 5465 and DISCALDIRT Air and Dirt Separator Series 546 links.)

Gooserider

 

[thecontrolguy]

Damon;

Hot water boiler systems regularly use a common type of side stream cartridge filtration that takes a small portion of the pumped heating water, filters it, and returns it to the pump suction. They are easy to change and can be gotten at most HVAC wholesalers.
They look like this;

(broken link removed to http://www.watergroup.com/cartridge-filters/cartridge-filters-misc-hot-water-side-stream.htm)

Cheers.

 

[snowman49820]

I have one from McMaster Carr. It's black fiberglass, 10"x 4.5" with 1" or 1 1/2" pipe thread. It's good for 250*. Works good, but they are very expensive.

 

[DenaliChuck]

I have this one (broken link removed to http://www.h2odistributors.com/fw8000ht34.asp) and it seems to be working fine.

 

[heaterman]

We use one made by Rusco from Brooksville Florida. Part number 1-1/2 - 100ht-f Comes with a 100 mesh (.006") stainless steel screen. Pressure loss listed at 30gpm is 3.1PSI