Step by Step Instructions for Repairing the T-550 Frost-free Sillcock
The T-550 is certified to ASSE 1019 Type A. In accordance with Sections 1.2.3 and 1.2.4 of this standard, the T-550's operating pressure shall not exceed 125 psi and the operating temperature range is 33 degrees F to 140 degrees F.
DIAGRAM.
Step 1: Determine Model
Determine which T-550 model you have to ensure you order the correct replacement parts. Look at the identification disc located on the handle as shown. If a size appears on your handle, note the handle color (Brown or Black) and determine your part number using the chart below. There are TWO ways to do this.
| Handle Color | ||
| Size | Brown | Black |
| 4" | 108-904RVTV | 108-904A |
| 6" | 108-906RVTV | 108-906A |
| 8" | 108-908RVTV | 108-908A |
| 10" | 108-910RVTV | 108-910A |
| 12" | 108-912RVTV | 108-912A |
| 14" | 108-914RVTV | 108-914A |
If a size / part was found:
You can order your replacement part from a selection of the online retailers below and once your replacement part arrives, proceed to Step 2.
If a size / part was NOT found:
If a size does NOT appear on your handle, you will have to remove the stem assembly and measure it to ensure you get the proper replacement stem. Follow the steps below.
STEP 2: Turn Off Water
Turn off the water supply. If you do not know how, please contact a licensed plumber.
STEP 3: Remove the Stem Assembly
Remove the stem assembly from the body of the T-550:
Black Handle
Brown Handle
STEP 4: Measure
(skip this step if you already have your replacement stem assembly)
Measure the FULL LENGTH of the assembly as shown and note the number of o-rings on the cartridge at the end of the stem, opposite the handle.
Visually identify the cartridge you have and use the corresponding chart to determine the replacement part number.
(1) O-ring, (2) Tabs
| Measurement | Part Number |
| 8-1/2" | 108-904A |
| 10-1/2" | 108-906A |
| 12-1/2" | 108-908A |
| 14-1/2" | 108-910A |
| 16-1/2" | 108-912A |
| 18-1/2" | 108-914A |
| Measurement | Part Number |
| 8" | 108-904RVL |
| 10" | 108-906RVL |
| 12" | 108-908RVL |
| 14" | 108-910RVL |
| 16" | 108-912RVL |
| 18" | 108-914RVL |
(2) O-rings, No Tabs
| Measurement | Part Number |
| 8-1/2" | 108-904AR |
| 10-1/2" | 108-906AR |
| 12-1/2" | 108-908AR |
| 14-1/2" | 108-910AR |
| 16-1/2" | 108-912AR |
| 18-1/2" | 108-914AR |
You can now order your part from a selection of online retailers below:
Step 5: Remove the Handle
Remove the handle from the old stem and place it onto the replacement stem.
Step 6: Insert the Stem
Insert the stem assembly into the body.
Step 7: Turn on the Water
Turn on the water to check for leaks.
