108-912A LEGEND 12” T-550A IMPROVED FLOW CARTRIDGE & STEM ASSEMBLY
Fits Improved Flow 12” Frost-Free T-550A Sillcock
Repair your Legend T-550A frost-free sillcock with the 108-912A Replacement Cartridge & Stem Assembly. Engineered for the Improved Flow T-550A design, this cartridge restores smooth performance and eliminates leaks for dependable year-round operation.
✅ Key Features
✅ Fits 12” Legend T-550A Improved Flow Frost-Free Sillcock
✅ Cartridge length: 15-3/4" (without handle) / 16-1/2" (with handle)
✅ Sillcock length: 12"
✅ Straight inlet connection with round knurled pad (smooth style)
✅ One O-ring design with two alignment tabs for proper seating
✅ Black handle disc with silver LEGEND lettering
✅ Patent marking: Pat. 5.392.805 D527.797
✅ Improved Flow design enhances water output and reliability
⚠️ Note: The 108-912AR fits the Original / Retrofit T-550 model (silver disc, Pat. Pend., two O-rings, tapered inlet). Always verify identification before ordering.
🧩 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 |
108-912A |
| Fits |
Legend T-550A Improved Flow 12” Frost-Free Sillcock |
| Sillcock Length |
12" |
| Cartridge Length Without Handle |
15-3/4" |
| Cartridge Length With Handle |
16-1/2" |
| Disc Color / ID |
Black disc with silver LEGEND lettering |
| Patent Marking |
Pat. 5.392.805 D527.797 |
| Inlet Connection |
Straight with round knurled pad |
| Design Type |
Improved Flow (T-550A) |
| O-Rings / Tabs |
Single O-ring, two 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 |
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 108-912A (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
-
Sillcock is 12”
-
Patent marking: Pat. 5.392.805 D527.797
✅ 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
-
Patent marking: Pat. Pend.
🔧 Common Problems This Fixes
-
Leaking or dripping sillcocks
-
Hard-to-turn handles or poor flow
-
Worn or damaged cartridge seals
-
Loss of frost-free protection due to failed stem seal
🛠️ Installation Overview
-
Turn off water supply.
-
Remove handle and existing stem assembly.
-
Verify your sillcock model and disc color.
-
Apply plumber’s grease to O-ring before installing new cartridge.
-
Tighten, reinstall handle, and check for smooth operation.
❓ FAQ
Q: How can I tell if my sillcock is T-550A or T-550 Original?
A: Look at the handle disc and inlet shape. Black disc with silver lettering and straight knurled inlet = T-550A. Silver disc with black lettering and tapered inlet = T-550 Original.
Q: Will 108-912A fit older T-550 sillcocks?
A: No. Use 108-912AR for the Original / Retrofit version.
Q: Do I need special tools to replace it?
A: Only standard tools — typically a wrench or pliers for stem removal.
