AFWFilters vs DuraWater: Same Fleck Valve, Different Box

AFWFilters vs DuraWater is a choice between two sellers, not two softeners. For the 48,000-grain system with 10% crosslink resin, both ship a Pentair Fleck 5600SXT metered valve, 1.5 cubic feet of resin and a 10 x 54 inch mineral tank. What differs is the brine tank, the bypass options, and above all what each seller tells you in writing. AFWFilters publishes its prices, install guides, a parts store, warranty terms and a 120-day return policy on its own site. DuraWater's website gives specifications and a phone number, but no prices and no warranty terms. On that basis, AFWFilters is the easier one to buy from. Both sites also name some of the same Amazon listings, which changes how you should compare prices.

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AFWFilters vs DuraWater: The 48k 10% Resin Box, Side by Side

DuraWater's website has no page for the 48k 10% system. It has pages for its 32k and 64k 10% resin systems and for its standard 48k systems. The DuraWater column therefore combines the title of its 10% resin Amazon listing with DuraWater's own 48k pages. Confirm the brine tank, bypass and resin volume with DuraWater for that listing before you order.

How This Comparison Was Built

Method. No unit was physically tested. AFWFilters' specifications and policies come from its store's product pages and FAQ. DuraWater's come from its own product pages and the Amazon listing titles. Valve facts come from Pentair's Fleck 5600SXT downflow service manual. Each Amazon listing was opened to confirm the product page exists and to read its title.

Prices are not listed here because they change often. Use the buttons to see the current price on Amazon.

The Valve Is the Same; Everything Around It Is the Seller's

The Fleck 5600SXT is a Pentair valve. Pentair publishes its manual, its regeneration settings and its operating limits: at least 20 psi to regenerate, no more than 125 psi, and water no hotter than 110°F. Neither seller changes any of that. The parts that wear, the piston, seals and spacers, are the same Pentair parts whichever box the valve came in.

So the comparison is about what each seller bolts on and stands behind. That is the same logic set out in how to compare water softener spec sheets: resin volume, resin grade, valve maker and a stated salt dose tell you more than the grain number on the box.

Capacity at a stated salt dose

Both systems hold 1.5 cubic feet of resin. At an efficient 6 lb of salt per cubic foot, that is about 31,500 grains between regenerations, not 48,000, and 9 lb of salt per cycle. The two are identical on this measure. Why the box figure overstates usable capacity is explained in advertised vs usable softener capacity.

Resin grade

Both listings name 10% crosslink resin. That is the right choice on chlorinated city water, because it resists chlorine damage longer than standard 8% resin. The trade-off is set out in standard vs chlorine-resistant softener resin. On a well with no chlorine, both sellers' standard-resin 48k systems do the same job for a little less.

One caution on AFWFilters' pages. Its standard 48k page says the system has "high capacity 8% crosslink resin". Further down, the same page carries a paragraph saying "inside every unit is upgraded 10% crosslink resin". That paragraph appears on several AFW product pages, including the fine-mesh Iron Pro. If the grade matters to you, ask AFWFilters to confirm it in writing. On the 10% listing compared here, the title and the paragraph agree.

Brine tank and bypass

These are the real hardware differences:

• Brine tank. AFW's default is a 14-inch square tank with a safety float and air check, with 18-inch round tanks as paid options. A larger round tank means fewer bags carried and refills spaced further apart on hard water. DuraWater's 48k pages list a 14 x 14 x 34 inch tank holding about 250 lb of salt, with a safety float and an overflow drain as a backup.
• Bypass. AFW lets you choose 3/4 or 1 inch, in plastic or stainless steel. One buyer's review on AFW's own page notes that the stainless bypass also needed two copper nipples to connect, which AFW did not mention at checkout. DuraWater lists a 1-inch Noryl plastic bypass on a 1-inch male threaded yoke.

What Each Seller Publishes on Its Own Site

This is where the two sellers differ most. A softener bought online is a 10-year ownership decision. Somewhere in those years you will need a setting, a seal kit or a warranty claim.

None of this says DuraWater's hardware is worse. The specifications it does publish match AFW's closely. It means that with DuraWater, the warranty terms, return terms and parts supply are things you have to ask for, and get in writing, rather than read before you buy. The Fleck valve itself softens that risk. Its seal kits, pistons and boards are sold by many independent suppliers, so you are not tied to either seller for valve parts.

Both Sites Name Some of the Same Amazon Listings

Each AFWFilters product page has an "Additional Information" tab listing the Amazon listings it applies to. Several DuraWater product pages list Amazon listings too. Set side by side, they overlap.

• Shared listing A is listed on AFWFilters' standard 48k page and on DuraWater's "Pentair Fleck 48,000 grain" page.
• Shared listing B is listed on AFWFilters' standard 48k page and on DuraWater's 48,000-grain Iron Blaster page. One describes standard resin and the other fine mesh.
• A DuraWater Iron Blaster listing carries the DuraWater name in its Amazon title, "DuraWater Fleck 5600 SXT 48K Water Softener/Iron Filter … with Fine Mesh Resin". It is listed on AFWFilters' Iron Pro 48k page.

We could not find a statement from either company explaining this, and we do not assume a corporate relationship. Amazon listings can carry several sellers, and either company may simply be pointing at a listing it also sells on. The practical point is narrower:

1. The brand name on a listing does not tell you who ships it. Read the "Ships from" and "Sold by" lines.
2. Compare the listing with the seller's own price. AFW's store price is public, so it is the reference point for any listing that AFW sells through.
3. Match the resin to the listing, not the brand. The same listing described as standard resin on one site and fine mesh on the other is a reason to ask the seller which resin ships, before you order.

The Iron Versions: Iron Pro 2 48k vs Iron Blaster 48k

For well water with dissolved iron, each seller has a fine-mesh 48k on the same valve.

AFW states its iron limit; DuraWater's page does not. That matters, because the iron rating, the form of the iron and the regeneration override decide whether either unit works on your well at all. Before choosing either, check that the iron is dissolved rather than already rusted. Then size the bed on compensated hardness, adding about 4 gpg for each ppm of iron and manganese. And remember the DuraWater Iron Blaster listing sits on AFW's Iron Pro page as well, so compare its price with AFW's own store price before ordering.

Comparing Prices on the Day You Buy

Prices are not listed here because they change often. AFWFilters publishes current prices for its 10% resin, standard 8% resin and Iron Pro 48k systems on its own store. DuraWater's website shows no prices, so its Amazon listings are the only place to see one. Check both on the day you buy, and compare like with like: the same resin grade, brine tank and bypass.

Check the Box When It Arrives

Whichever seller you choose, check the delivery against the listing before you cut a pipe. AFW's 120-day return policy requires the items to be unused and in their original packaging, so the check has to happen first.

1. Valve label. Confirm it reads Fleck 5600SXT and that a meter cable is fitted.
2. Resin. The mineral tank should arrive with resin already loaded. Note any paperwork naming the resin grade, and keep it.
3. Brine tank. Match the size to the one you ordered, and confirm the safety float is in the brine well.
4. Bypass and connectors. Check the size, 3/4 or 1 inch, and the material against your order. Plan any extra fittings, such as nipples for a stainless bypass, before install day.
5. Paperwork. Keep the invoice, the install booklet and the warranty terms together. A warranty claim in year four starts with them.

If anything differs from the listing, contact the seller before installing. Return terms usually end once a system has been plumbed in.

AFWFilters vs DuraWater: Which to Buy

For most buyers, AFWFilters. The hardware is a tie. The written terms are not.

DuraWater makes sense when its listing is meaningfully cheaper and DuraWater confirms, in writing, the warranty on the valve and tanks and how returns work. The Fleck valve's open parts supply means the seller matters less after year five than it does in the first month.

Who Should Buy Neither

• Homes with more than about 10 gpm of real demand. The 5600SXT is a 3/4-inch valve. Large houses with several bathrooms in use at once are better served by a larger valve.
• Wells with rusty water at the tap, iron bacteria or more than about 5 ppm of iron. Put an iron filter first. A fine-mesh softener is not a filter for oxidized iron.
• Anyone who will not program the valve. Both ship with factory settings. Capacity, hardness, reserve and refill time need setting to your water, or the salt dose and capacity will not match.
• Buyers still deciding between salt-based and salt-free. Both of these are salt-based ion-exchange softeners. Start with salt-based vs salt-free water treatment if you have not settled that question.

The valve is the same in both boxes. Choose the seller whose terms you can read before you pay. Then compare the actual listing in front of you, resin line, ships-from line and price, against that seller's own store.