FAQ

HOME-FLEX
TM
Underground Frequently Asked Questions
1. Can I use HOME-FLEX
TM
Underground pipe inside my home?
a. No. Polyethylene gas pipe, no matter who manufactures it, is not to be used in a building or
under a foundation with a structure on it. Not only is it against all codes, it is potentially
dangerous.
2. Can underground PE gas pipe be used for propane applications?
a. Yes. It is certified for use with Propane as well as Natural Gas.
3. When installing PE underground gas pipe, is it alright to sweep it to the surface to make my
final connections?
a. No, all yellow gas pipe needs to be at or below code-mandated burial levels (12” - 24”
depending on your local codes). The yellow poly pipe should never be above grade.
4. Can I use the Transition Fitting in a vertical format to make my own riser?
a. No. The transition fitting is made to be used in a horizontal format to connect D2513 yellow
poly gas pipe to black pipe. It must be at or below code mandated burial levels.
5. Why does the ½” meter riser have ¾” threads?
a. Half-inch underground products aren’t in high demand. We use the same metal part on both
the ½” and ¾” meter risers due to this low demand and to keep its retail price as low as
possible. Further, most above-ground installation have ¾” fittings to the meter.
6. I want to transition from black pipe to yellow underground poly pipe. Can I do that with your
underground products?
a. Absolutely. We have all sizes of transition fittings and meter risers (1/2” through 2”) that will
enable you to make that metal-to-poly transition. Further, we recently introduced a new
conversion fitting in ½”, ¾” and 1” sizes. Check out part numbers 221076, 221077, 221078 at
homeflexunderground.com or at homedepot.com.
7. What is your “Conversion Fitting” for and how is it different than your “Transition Fitting?”
a. The conversion fitting is a relatively new part we introduced to Home Depot in 2020 via
homedepot.com. It is a combination of a HOME-FLEX
TM
coupler and a transition fitting
designed to transition between steel pipe and D2513 poly pipe. It is currently only available in
½”, ¾”, and 1” sizes and only on homedepot.com.
8. Can I take apart HOME-FLEX
TM
Underground fittings if I need to make adjustments or
changes to my system?
a. Yes. Unlike some push-to-connect fitting manufacturers, our underground fittings can be
easily disassembled and reused.
9. Can I use your CSST brass fittings with your Underground pipe?
a. No, they are completely different product lines and are not compatible.
10. After my system is complete and before final burial, how long must the system be pressure-
checked and at what psi?
a. We recommend you check the entire system for 30 minutes at 15psi. Overnight testing is not
recommended due to “false positives” that may result from temperature and barometric
changes.
11. Do I need to wrap HOME-FLEX
TM
Underground parts prior to burial?
a. No, the product line is purpose made for direct burial and does not need to be wrapped nor put
in a conduit.