Clean Well Water Report: Filter Tank Backwash Flow Rate Required?

Hello Sirs,

Will a 7"x44" 0.5cf Chemsorb Tank backwash from a 3.5gpm flow? I have a dc shallow well pump in my cistern that I don't really want to replace but I would like to replace my sediment filter cartridges. (unrestricted flow is 3.9gpm)

Will your KDF Media Guard Cartridges work in a 7"x44" or 6”x35” backwashing Activated Carbon Tank?

You may not be able to answer this, but I have been considering purchasing a U440 Ultrafiltration System (Backflush Install). I know that kdf media gives off zinc oxide which has anti-bacterial effects increasing the life of Carbon but I’m wondering if it could be placed before an Ultrafiltration system to help keep the membrane from fouling?

Would you recommend placing a KDF/Carbon tank before or after a U440 system or sticking with 0.5m carbon blocks.

Sincerely,

Karl

Hi Karl,

Please view the answers below:

Will a 7"x44" 0.5cf Chemsorb Tank backwash from a 3.5gpm flow?

3.5 gpm would work fine for it, that is the appropriate amount of backwash flow.
Do you have a pressure tank? If so, that would help ensure that the backwash would be sufficient.

Will your KDF Media Guard Cartridges work in a 7"x44" or 6”x35” backwashing Activated Carbon Tank?

It would work fine in a 7” x 44” tank, but you wouldn’t want to put it in a 6” 35” tank- it’s about 33” long, and with the distributor basket at the bottom of the tank, there wouldn’t be any room.

Would you recommend placing a KDF/Carbon tank before or after a U440 system or sticking with 0.5m carbon blocks.

Placing the filter beforehand would work well for prefiltering. On a related note- would you like a quote on a decent U440 system? We have a few options, some of which are incredibly low-cost but superb quality. Let me know and I can work up a quote.

Sincerely,

Brett Hydeman

Sales and Customer Support

Clean Water Systems & Stores Inc.

Toll-Free: 888-600-5426

Fax: 831-515-5119

brett@cleanwaterstore.com

www.cleanwaterstore.com

The following is a quote based on your specifications-

7” x 44” 0.5 CF Sediment Manual Backwash Filter

· For this size of tank, chrome jackets aren’t available, though blue or almond jackets are available. Let me know if you would like a quote with one of these colors instead.

· If the chrome jacket is really important, we can do this size of system in an 8” x 44” tank, and that should still work for your flow rate. Let me know if you would like a quote with an 8” x 44” tank instead.

Like you said, the filter strainer is recommended in this case, in order to ensure the protection the venturi injector. We would recommend this model:

Filter Strainer 1" 60 mesh
http://www.cleanwaterstore.com/MS005270-p-filter-strainers.html

I hope this information helps with your questions if I may be of further assistance please give me a call or an email. I’m happy to help. Thanks again for the opportunity to be of assistance, I look forward to hearing from you.