Quick Answer: A brine tank with plenty of salt that never draws down after regeneration almost always traces back to a clogged or worn injector (venturi), not the tank or float. The Fleck 10913/10914 nozzle and throat set — the part that actually fouls with sediment — runs about $19 at AFW Filters and is the right first fix for most Fleck-based systems (5600, 5600SXT, 2510, 9000, 9500). If the injector housing itself is cracked rather than just clogged, the full injector body assembly runs roughly $98 on sale (list price $195.70, per Aquascience’s own listing). GE, Kenmore, and Whirlpool clip-style tanks use a different part entirely — their venturi is built into the 7310202 brine valve assembly (~$34.95-$40.62).
The injector is the least glamorous part of a water softener and the one most owners never learn exists — until the brine tank stops drawing down and salt sits there untouched, run after run. It works on the same principle as a carburetor: water forced through a narrowed nozzle speeds up and drops in pressure, and that pressure drop is what pulls brine out of the tank and into the resin bed. It’s a passive part with no motor or seal to fail in the usual sense — it just fouls with the fine sediment and iron that well water and older plumbing carry, or occasionally cracks from age.
Injector options at a glance
| Product | Best for | Fits | Price | Rating |
|---|---|---|---|---|
| Fleck 10913/10914 Nozzle & Throat Set | Best overall — most Fleck-controlled softeners | Fleck 1500/2510/2750/2850/2900/5600/9000/9500 | ~$19 | ★★★★★ |
| Fleck 5600 Injector Body Complete | Best for cracked/damaged housing | Fleck 5600 and 5600SXT valves | ~$98 (list $195.70) | ★★★★☆ |
| Kenmore/GE/Whirlpool 7310202 Brine Valve w/ Venturi | Best for clip-style big-box brands | Kenmore, GE, Whirlpool, Morton | ~$34.95-$40.62 | ★★★★☆ |
| Water Softener Resin & System Cleaner | Best free-first-try before ordering parts | Any brand, run through a manual regen cycle | ~$15-25 | ★★★★☆ |
1. Fleck 10913/10914 Nozzle & Throat Set — Best Overall
Fleck Brine Injector Nozzle (10913) & Throat (10914) Set
- The exact pair that actually fouls — the nozzle and throat form the narrow venturi bore where sediment and iron scale accumulate, the same mechanism our water softener not working guide flags as the #4 most common no-regeneration cause.
- Sized by tank diameter (roughly #0 through #2 for 6"-13" tanks), not by valve model alone — confirm your resin tank's diameter before ordering.
- Covers the same Fleck platform used across the Fleck 5600SXT and the majority of softeners reviewed on this site.
A softener that’s quietly stopped drawing brine doesn’t look broken from the outside — the display still runs its cycle, the tank still has salt, and the only clue is water that’s slowly creeping back to hard. Amazon Prime gets a replacement nozzle and throat set to your door free in two days so you’re not running hard water any longer than it takes to notice, and you can try it free for 30 days.
This is the default first part to order for any Fleck-controlled system. It’s a five-minute swap once the injector cap is off — no tools beyond a screwdriver in most cases — and it resolves the large majority of “tank has salt but won’t draw down” complaints without touching the rest of the valve.
2. Fleck 5600 Injector Body Complete — Best for Cracked or Damaged Housing
Fleck 5600/5600SXT Injector Body Complete (Cap, Housing & O-Rings)
- The full injector cap and housing assembly, not just the nozzle and throat — worth the step up only when the plastic body itself is cracked, the cap won't thread down and seal, or a fresh nozzle/throat swap didn't restore suction.
- Includes the O-rings that seal the injector cap against the valve body, a common secondary leak point once the housing has been opened a few times over the years.
- Pairs with the rebuild-kit logic in our best water softener control valve guide — cheap part swaps first, full valve-head replacement only once rebuild parts stop being worth chasing.
Ordering the full body when only the nozzle and throat had fouled is the most common overspend on this repair — at roughly five times the price of the nozzle/throat set, it’s worth confirming the housing is actually cracked (not just scaled) before stepping up here.
3. Kenmore/GE/Whirlpool 7310202 Brine Valve Assembly with Venturi — Best for Clip-Style Brands
7310202 Brine Valve Assembly with Venturi
- Big-box-brand softeners don't use Fleck's separate nozzle-and-throat design — the venturi is built into this single clip-style brine valve assembly, the same part covered in our best water softener float valve guide.
- Cross-references to GE part WS15X10077 and Kenmore/Whirlpool 7310197 — confirm the exact number against your tank's model plate before ordering.
- Matches the brand family in our Morton water softener review and Whirlpool water softener review.
If your softener came from Lowe’s, Menards, or Walmart rather than a dedicated water-treatment dealer, this — not the Fleck nozzle/throat set — is almost certainly the part you need.
4. Water Softener Resin & System Cleaner — Best Free-First-Try
Water Softener Resin & System Cleaner
- Worth running before ordering any part — a cleaner cycle clears minor sediment and iron fouling from the injector bore in many cases, especially on well water, without opening the valve at all.
- Full brand-by-water-type comparison in our best water softener cleaner guide.
- Doesn't fix a cracked housing or a physically worn nozzle bore — if a cleaner cycle doesn't restore suction, move to the nozzle/throat set above.
The cheapest and fastest thing to try first, and the reason we list it even though it’s not a replacement part — it costs less than a fifth of a nozzle/throat set and takes one regeneration cycle to test.
Injector vs. everything else that can stop brine draw
- Tank has salt but the water level never drops after regeneration — this is the injector, not the tank or float. Start with a cleaner cycle, then the nozzle/throat set.
- Tank overflows, or water dribbles from the low overflow port — that’s the float valve, the opposite failure mode. See best water softener float valve.
- Salt is visibly bridged (a hard crust with an air gap underneath, water below it) — break the bridge by hand first; that alone resolves a large share of no-draw complaints without touching the injector at all.
- Injector is clear and the tank still won’t draw — check the brine line for a kink or a clogged pickup-tube screen before assuming the injector itself is bad.
For the full diagnostic path from symptom to part, see our water softener not working guide, and for the maintenance schedule that prevents injector fouling in the first place, see water softener maintenance guide.
The bottom line
A brine tank that holds salt but never draws down is, in most cases, a clogged injector, not a bad tank or float — and the fix is cheap. Try a resin and system cleaner first (under $25, one regeneration cycle), then the Fleck 10913/10914 nozzle and throat set ($19) if cleaning doesn’t restore suction. Only step up to the full injector body ($98) if the housing itself is cracked, and confirm your brand first — GE, Kenmore, and Whirlpool tanks need the clip-style 7310202 assembly (~$35-40) instead of Fleck’s separate nozzle-and-throat parts.