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Cleaning CV1800 Filters

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Forum topic by AlaskaJohn posted 01-17-2021 09:28 PM 465 views 1 time favorited 23 replies Add to Favorites Watch
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AlaskaJohn

15 posts in 5094 days


01-17-2021 09:28 PM

Can you share any techniques on how you clean your stacked Winn filters for your CV1800? I’d like to keep mine installed if possible and also have them installed on a small clean-out box at the bottom of the double-stacked filters.

Compressed air in a “backwash” technique has been my go-to in the past. What a pain.

Thanks!

John

-- John, North Carolina


23 replies so far

View tvrgeek's profile

tvrgeek

1388 posts in 2656 days


#1 posted 01-17-2021 09:49 PM

I think that is it. No flapper? Some high end reverse the flow. The Harvey is actually set up with a hose port so the intake is through the HEPA filters. so, reverse flow and spin the flapper.

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tvrgeek

1388 posts in 2656 days


#2 posted 01-17-2021 09:58 PM

Hmmm. Reading on the Wynn site. EU HEPA and US HEPA are different. They state there is no such thing as a cleanable US spec HEPA filer. Makes me wonder about some system claims.

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AlaskaJohn

15 posts in 5094 days


#3 posted 01-17-2021 10:03 PM

No, the CV1800 does not use a flapper. Double stack Wynn filter with a cleanout at the bottom.

-- John, North Carolina

View Fred Hargis's profile

Fred Hargis

6826 posts in 3500 days


#4 posted 01-18-2021 11:35 AM

What makes you think they need cleaning? (BTW, blowing them out from the outside seems to be your only choice.) I have a gauge on mine that indicates if the filters are clogging. There was a time when I emptied the dust bin (55 gallon drum) and didn’t seat the top back on correctly, allowing a leak. The lower filter was about half full of sawdust, I noticed it because my magnehelic went from a minus reading to 2”. I did have to disassemble the stack to clean it out. Point is, a gauge can tell you a lot….I bought mine for about $25 from ebay, but you can make a tube type manometer for next to nothing. Then you’ll know for sure whether you even have a problem. Here’s a of mine on the Oneida I used to have…I’s switched to a CV a few years back, and still use the same gauge. BTW, those flappers don’t help all that much, most of the fine dust stays in the folds of the filter.

-- Our village hasn't lost it's idiot, he was elected to congress.

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AlaskaJohn

15 posts in 5094 days


#5 posted 01-18-2021 11:44 AM

Thanks, Fred! I’d like to buy a gauge like yours – can you help with which one and then where/how to install it on my CV1800? It seems that the homemade tube systems would be evaporating like crazy in the winter.

Thanks!

-- John, North Carolina

View Redoak49's profile

Redoak49

5091 posts in 2995 days


#6 posted 01-18-2021 12:03 PM

+1 on Magnehelic gauge. I bought mine on ebay.

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AlaskaJohn

15 posts in 5094 days


#7 posted 01-18-2021 12:23 PM

@redoak49, how did you install it on your CV1800?

-- John, North Carolina

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Fred Hargis

6826 posts in 3500 days


#8 posted 01-18-2021 01:14 PM

Installing them couldn’t be easier. All you do is put a brass fitting (called a “tap”) into the discharge plenum somewhere. The tap is threaded on one end, and has a barbed fitting for a 1/8” hose on the other other. On my CV I screwed the tap into the MDF just ahead of the filters. Keep the inner surface of the tap flush with the surface of the MDF. The it’s just a hose connection to the Magnehelic, on the high pressure port. My Magnehelic is a 0-10” model. I tried a 0-4” one, but it had so much needle bounce I changed it to the higher reading. Oneida sells an arrange,ment something like this, but I think they actually use a pitot tube in the DC…and it’s a lot more expensive than what I paid. I bought the one I have off E bay, and I think they were in the $25 range (this was some years ago) and the ones I got came with all the fittings you need, but if yours doesn’t they are easily available at most home stores in the plumbing section. Please note, the waay I installed mine probably doesn’t give you dead accurate readings, but it does give you a starting point and an indication of which way the pressure is going. I know my Oneida DC had a label on the dust bin suggesting you clean the filters at 4” (as I recall). Anyway, that’s what i did with it, when the needle started approaching 4”, I took the filter off and cleaned it.

-- Our village hasn't lost it's idiot, he was elected to congress.

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AlaskaJohn

15 posts in 5094 days


#9 posted 01-18-2021 01:27 PM

Great help, Fred! Thanks. Yes, a pic would help. So, what about putting the tap into my wooden cleanout at the bottom of the filter tower? Also, there are 2 ports on the one I purchased at eBay:

https://www.ebay.com/itm/233840384801

I only have to install the high-pressure port?

Again, thanks for the help!

-- John, North Carolina

View Fred Hargis's profile

Fred Hargis

6826 posts in 3500 days


#10 posted 01-18-2021 01:35 PM

Here’s my setup on the CV. My fear of putting it on the cleanout would be it will clog with dust and read artificially low…but that’s a guess. I connected to the HP port.

-- Our village hasn't lost it's idiot, he was elected to congress.

View paulLumberJock's profile

paulLumberJock

60 posts in 205 days


#11 posted 01-22-2021 07:42 PM

I ran a piece of 6” sewer and drain pipe from the bottom of my collection box and ran it to the basement window.
There’s a valve keeping it closed most of the time.

When the weather is nice or I want to clean the filters, I open the valve so that the air can blow outside.
If it’s been a while, a huge “cloud of death” will appear outside. Cleans the filters pretty good. There was noticably more suction after the first time I Did it, so I continue to do it.

Note, I have it set up to add an extension to the pipe so all the dust blows out the window.

When it’s cold, the valve is shut and all the exhaust air goes through the filter.
Oh , I still have a way to open the dust collection box at the bottom for periodic cleaning of the dust that settles there.

If there’s interest, I can try to figure out how to post a picture.

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AlaskaJohn

15 posts in 5094 days


#12 posted 01-22-2021 07:57 PM

Fred, Thanks for the help! My new Magnehelic just came in today! So excited to get it installed. I’ll do a thorough cleaning of the filters before I install it and use that as a reference point.

Paul, that is a great idea! Better than trying to collect the “cloud of death” with a shop vac!

AGain, thanks to you both for your help!

-- John, North Carolina

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AlaskaJohn

15 posts in 5094 days


#13 posted 01-29-2021 09:13 PM

Fred, installed my new magnehelic and it just barely gets over zero and the filters have not been cleaned. So, I’m thinking that I need a 1-10” model at least. I’ll attach pics of the install.

Thanks for your help!

-- John, North Carolina

View Fred Hargis's profile

Fred Hargis

6826 posts in 3500 days


#14 posted 01-30-2021 12:12 PM

Glad you got it worked out, though I am puzzled by your comment about needing at least a 10” gauge. Yours is 15, what’s wrong with that?

-- Our village hasn't lost it's idiot, he was elected to congress.

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AlaskaJohn

15 posts in 5094 days


#15 posted 01-30-2021 12:20 PM

It is not even registering .01” when the DC is on and the filters are dirty. I think I need a more sensitive gauge with lower pressure.

You purchased the 0 – 4” version first, I think that is what I’m going to look for.

Here is a pic showing the gauge with the DC running. It is “just” above the zero peg. and not yet even to zero!

-- John, North Carolina

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