108-912AR LEGEND 12” T-550 ORIGINAL / RETROFIT CARTRIDGE & STEM ASSEMBLY
Fits Original 12” Frost-Free T-550 Sillcock
Restore performance to your Legend T-550 Frost-Free Sillcock with the 108-912AR Replacement Cartridge & Stem Assembly. Designed for the Original / Retrofit T-550, this cartridge ensures a precise fit, smooth operation, and long-term leak prevention.
✅ Key Features
✅ Fits 12” Legend T-550 Original / Retrofit Frost-Free Sillcock
✅ Cartridge length: 15-5/8" (without handle) / 16-1/2" (with handle)
✅ Sillcock length: 12"
✅ Tapered inlet connection with six wrench flats for secure installation
✅ Dual O-ring seal for watertight reliability (no end tabs)
✅ Silver handle disc with black LEGEND lettering, marked Pat. Pend.
✅ Retro-fit design replaces older detachable cartridge models
✅ Compatible with Legend T-550 Original Series frost-free sillcocks
⚠️ Note: The 108-912A fits the Improved Flow T-550A model (black disc, Pat. 5.392.805 D527.797, straight knurled pad, single O-ring + 2 tabs).
🧩 Cross Reference
| Model | Fits | Disc Color / Marking | Cartridge Without Handle | With Handle | Sillcock Length |
|---|
| 108-912A |
T-550A Improved Flow |
Black / Silver LEGEND |
15-3/4" |
16-1/2" |
12" |
| 108-912AR |
T-550 Original / Retrofit |
Silver / Black LEGEND |
15-5/8" |
16-1/2" |
12" |
📊 Specifications Table
| Specification | Detail |
|---|
| Model |
108-912AR |
| Fits |
Legend T-550 Original / Retrofit 12” Frost-Free Sillcock |
| Sillcock Length |
12" |
| Cartridge Length Without Handle |
15-5/8" |
| Cartridge Length With Handle |
16-1/2" |
| Disc Color / ID |
Silver disc with black LEGEND lettering |
| Patent Marking |
Pat. Pend. |
| Inlet Connection |
Tapered with six wrench flats |
| Design Type |
Retrofit / Original Flow |
| O-Rings / Tabs |
Dual O-rings, no tabs |
🔍 Identification Guide
Step 1: Check the Handle Identification Disc
| Feature | 108-912A (T-550A Improved Flow) | 108-912AR (T-550 Original / Retrofit) |
|---|
| Disc Color |
Black |
Silver |
| Lettering Color |
Silver LEGEND |
Black LEGEND |
| Patent Marking |
Pat. 5.392.805 D527.797 |
Pat. Pend. |
✅ Quick Tip:
Silver disc with black letters → T-550 Original / Retrofit
Black disc with silver letters → T-550A Improved Flow
Step 2: Check Handle Inlet Style
| Feature | 108-912A | 108-912AR |
|---|
| Inlet Style |
Straight, round knurled pad |
Tapered, six wrench flats |
Step 3: Measure the Cartridge
| Model | Without Handle | With Handle | Sillcock Length |
|---|
| 108-912A |
15-3/4" |
16-1/2" |
12" |
| 108-912AR |
15-5/8" |
16-1/2" |
12" |
⚠️ Final Check Before Ordering
✅ Order 108-912AR (T-550 Original / Retrofit) if:
-
Handle disc is silver with black LEGEND lettering
-
Inlet connection is tapered with six wrench flats
-
Cartridge measures 15-5/8" without handle / 16-1/2" with handle
-
Sillcock length is 12”
-
Patent marking: Pat. Pend.
✅ Order 108-912A (T-550A Improved Flow) if:
-
Handle disc is black with silver LEGEND lettering
-
Inlet connection is straight with round knurled pad
-
Cartridge measures 15-3/4" without handle / 16-1/2" with handle
-
Patent marking: Pat. 5.392.805 D527.797
🔧 Common Problems This Fixes
-
Leaking or dripping frost-free sillcocks
-
Handle becomes stiff or hard to turn
-
Poor or inconsistent water flow
-
Corroded or damaged cartridge assembly
🛠️ Installation Overview
-
Shut off water supply.
-
Remove handle and existing stem assembly.
-
Identify your sillcock using disc color and inlet shape.
-
Apply plumber’s grease to O-rings before installing.
-
Reinstall handle and test operation.
❓ FAQ
Q: What’s the difference between the 108-912AR and 108-912A?
A: The 108-912AR fits the Original / Retrofit T-550 with a tapered inlet and silver handle disc (Pat. Pend.), while the 108-912A fits the Improved Flow T-550A with a straight inlet and black handle disc (Pat. 5.392.805 D527.797).
Q: Are the cartridges interchangeable?
A: No. Each fits its specific sillcock type — always verify using disc color, patent marking, and inlet style.
Q: Can I install this myself?
A: Yes, replacement is simple using standard household tools.
